GacUI/Import/VlppParser.cpp

/***********************************************************************
THIS FILE IS AUTOMATICALLY GENERATED. DO NOT MODIFY
DEVELOPER: Zihan Chen(vczh)
***********************************************************************/
#include "VlppParser.h"

/***********************************************************************
.\PARSING.CPP
***********************************************************************/
/***********************************************************************
Author: Zihan Chen (vczh)
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	namespace parsing
	{
		namespace tabling
		{
			using namespace definitions;
			using namespace analyzing;
			using namespace collections;
			using namespace regex;

/***********************************************************************
ParsingGeneralParser
***********************************************************************/

			ParsingGeneralParser::ParsingGeneralParser(Ptr<ParsingTable> _table)
				:table(_table)
			{
			}

			ParsingGeneralParser::~ParsingGeneralParser()
			{
			}

			Ptr<ParsingTable> ParsingGeneralParser::GetTable()
			{
				return table;
			}

			void ParsingGeneralParser::BeginParse()
			{
			}

			bool ParsingGeneralParser::Parse(ParsingState& state, ParsingTransitionProcessor& processor, collections::List<Ptr<ParsingError>>& errors)
			{
				BeginParse();
				processor.Reset();

				for(vint i=0;i<state.GetTokens().Count();i++)
				{
					const RegexToken* token=&state.GetTokens().Get(i);
					if(token->token==-1 || !token->completeToken)
					{
						errors.Add(Ptr(new ParsingError(token, L"Unrecognizable token: \""+WString::CopyFrom(token->reading, token->length)+L"\".")));
					}
				}

				while(true)
				{
					ParsingState::TransitionResult result=ParseStep(state, errors);
					if(!result)
					{
						const RegexToken* token=state.GetToken(state.GetCurrentToken());
						errors.Add(Ptr(new ParsingError(token, L"Internal error when parsing.")));
						return false;
					}
					else if(result.transitionType==ParsingState::TransitionResult::SkipToken)
					{
						if(state.GetCurrentTableTokenIndex()==ParsingTable::TokenFinish)
						{
							const RegexToken* token=state.GetToken(state.GetCurrentToken());
							errors.Add(Ptr(new ParsingError(token, L"Failed to recover error when reaching the end of the input.")));
							return false;
						}
						else
						{
							state.SkipCurrentToken();
							continue;
						}
					}
					else if(!processor.Run(result))
					{
						const RegexToken* token=state.GetToken(state.GetCurrentToken());
						errors.Add(Ptr(new ParsingError(token, L"Internal error when building the parsing tree.")));
						return false;
					}
					if(result.tableTokenIndex==ParsingTable::TokenFinish && !processor.GetProcessingAmbiguityBranch())
					{
						break;
					}
				}

				return true;
			}

			Ptr<ParsingTreeNode> ParsingGeneralParser::Parse(ParsingState& state, collections::List<Ptr<ParsingError>>& errors)
			{
				ParsingTreeBuilder builder;
				Parse(state, builder, errors);

				Ptr<ParsingTreeNode> node=builder.GetNode();
				if(!node)
				{
					errors.Add(Ptr(new ParsingError(L"Internal error when building the parsing tree after a succeeded parsing process.")));
					return 0;
				}
				return node;
			}

			Ptr<ParsingTreeNode> ParsingGeneralParser::Parse(const WString& input, const WString& rule, collections::List<Ptr<ParsingError>>& errors, vint codeIndex)
			{
				ParsingState state(input, table, codeIndex);
				if(state.Reset(rule)==-1)
				{
					errors.Add(Ptr(new ParsingError(L"Rule \""+rule+L"\" does not exist.")));
					return 0;
				}
				return Parse(state, errors);
			}

/***********************************************************************
ParsingStrictParser
***********************************************************************/

			bool ParsingStrictParser::OnTestErrorRecoverExists()
			{
				return false;
			}

			void ParsingStrictParser::OnClearErrorRecover()
			{
			}

			ParsingState::TransitionResult ParsingStrictParser::OnErrorRecover(ParsingState& state, vint currentTokenIndex, collections::List<Ptr<ParsingError>>& errors)
			{
				const RegexToken* token=state.GetToken(state.GetCurrentToken());
				errors.Add(Ptr(new ParsingError(token, (token==0?L"Error happened during parsing when reaching the end of the input.":L"Error happened during parsing."))));
				return ParsingState::TransitionResult();
			}

			ParsingStrictParser::ParsingStrictParser(Ptr<ParsingTable> _table)
				:ParsingGeneralParser(_table)
			{
			}

			ParsingStrictParser::~ParsingStrictParser()
			{
			}
			
			ParsingState::TransitionResult ParsingStrictParser::ParseStep(ParsingState& state, collections::List<Ptr<ParsingError>>& errors)
			{
				ParsingState::TransitionResult result;
				if (OnTestErrorRecoverExists())
				{
					result = OnErrorRecover(state, -1, errors);
				}
				else
				{
					result = state.ReadToken();
					if (result)
					{
						OnClearErrorRecover();
					}
					else
					{
						vint currentTokenIndex = state.GetCurrentTableTokenIndex();
						if (currentTokenIndex != -1)
						{
							result = OnErrorRecover(state, currentTokenIndex, errors);
						}
					}
				}
				return result;
			}

/***********************************************************************
ParsingAutoRecoverParser
***********************************************************************/

			ParsingAutoRecoverParser::RecoverFuture& ParsingAutoRecoverParser::GetRecoverFuture(vint index)
			{
				return recoverFutures[index];
			}

			ParsingAutoRecoverParser::RecoverFuture& ParsingAutoRecoverParser::CreateRecoverFuture(vint index, vint previousIndex)
			{
				RecoverFuture* rf = 0;
				if (index >= recoverFutures.Count())
				{
					CHECK_ERROR(index == recoverFutures.Count(), L"ParsingAutoRecoverParser::CreateRecoverFuture(vint, vint)#Wrong argument: index.");
					RecoverFuture recoverFuture;
					recoverFuture.future = new ParsingState::Future;
					index = recoverFutures.Add(recoverFuture);
				}
				rf = &GetRecoverFuture(index);
				rf->index = index;
				rf->previousIndex = previousIndex;
				return *rf;
			}

			bool ParsingAutoRecoverParser::OnTestErrorRecoverExists()
			{
				return recoveringFutureIndex != -1;
			}

			void ParsingAutoRecoverParser::OnClearErrorRecover()
			{
				recoveringFutureIndex = -1;
			}

			ParsingState::TransitionResult ParsingAutoRecoverParser::OnErrorRecover(ParsingState& state, vint currentTokenIndex, collections::List<Ptr<ParsingError>>& errors)
			{
				if(recoveringFutureIndex==-1)
				{
					List<vint> prioritizedTokens;
					prioritizedTokens.Add(ParsingTable::TokenFinish);
					CopyFrom(
						prioritizedTokens,
						Range<vint>(ParsingTable::UserTokenStart, table->GetTokenCount() - ParsingTable::UserTokenStart)
						);
					prioritizedTokens.Add(ParsingTable::LeftRecursiveReduce);
					prioritizedTokens.Add(ParsingTable::NormalReduce);
					prioritizedTokens.Remove(currentTokenIndex);
					prioritizedTokens.Insert(0, currentTokenIndex);

					vint processingFutureIndex=-1;
					vint usedFutureCount=0;
					while(processingFutureIndex<usedFutureCount)
					{
						RecoverFuture previous;
						if(processingFutureIndex!=-1)
						{
							previous = GetRecoverFuture(processingFutureIndex);
						}
						processingFutureIndex++;
						if(previous.future && previous.future->currentState==-1) continue;

						for (auto currentTableTokenIndex : prioritizedTokens)
						{
							vint newInsertedTokenCount = previous.insertedTokenCount;
							if (currentTableTokenIndex != ParsingTable::NormalReduce && currentTableTokenIndex != ParsingTable::LeftRecursiveReduce)
							{
								newInsertedTokenCount++;
							}
							if (currentTableTokenIndex != currentTokenIndex && newInsertedTokenCount > maxInsertedTokenCount)
							{
								continue;
							}

							RecoverFuture& now = CreateRecoverFuture(usedFutureCount, previous.index);
							now.insertedTokenCount = newInsertedTokenCount;

							if(state.ReadTokenInFuture(currentTableTokenIndex, previous.future, now.future, 0))
							{
								if(currentTableTokenIndex==currentTokenIndex)
								{
									if(previous.future)
									{
										recoveringFutureIndex = previous.index;
										RecoverFuture* rf = &GetRecoverFuture(previous.index);
										while(rf->future->previous)
										{
											RecoverFuture* prf = &GetRecoverFuture(rf->previousIndex);
											prf->nextIndex = rf->index;
											prf->future->next = rf->future;
											rf = prf;
										}
										recoveringFutureIndex = rf->index;
									}
									else
									{
										recoveringFutureIndex = 0;
									}
									goto FOUND_ERROR_RECOVER_SOLUTION;
								}
								else
								{
									usedFutureCount++;
								}
							}
						}
					}
				}
			FOUND_ERROR_RECOVER_SOLUTION:

				RecoverFuture* rf = 0;
				if (recoveringFutureIndex != -1)
				{
					rf = &GetRecoverFuture(recoveringFutureIndex);
					if(rf->future->next)
					{
						recoveringFutureIndex = rf->nextIndex;
					}
					else
					{
						recoveringFutureIndex = -1;
					}
				}

				if(rf)
				{
					return state.RunTransition(rf->future->selectedItem, 0);
				}
				else
				{
					return ParsingState::TransitionResult(ParsingState::TransitionResult::SkipToken);
				}
			}

			ParsingAutoRecoverParser::ParsingAutoRecoverParser(Ptr<ParsingTable> _table, vint _maxInsertedTokenCount)
				:ParsingStrictParser(_table)
				, recoveringFutureIndex(-1)
				, maxInsertedTokenCount(_maxInsertedTokenCount == -1 ? 4 : _maxInsertedTokenCount)
			{
			}

			ParsingAutoRecoverParser::~ParsingAutoRecoverParser()
			{
				for (auto future : recoverFutures)
				{
					delete future.future;
				}
			}

			void ParsingAutoRecoverParser::BeginParse()
			{
				recoveringFutureIndex = -1;
				ParsingStrictParser::BeginParse();
			}

/***********************************************************************
ParsingAmbiguousParser
***********************************************************************/

			ParsingAmbiguousParser::ParsingAmbiguousParser(Ptr<ParsingTable> _table)
				:ParsingGeneralParser(_table)
				,consumedDecisionCount(0)
			{
			}

			ParsingAmbiguousParser::~ParsingAmbiguousParser()
			{
			}

			void ParsingAmbiguousParser::OnErrorRecover(ParsingState& state, vint currentTokenIndex, collections::List<ParsingState::Future*>& futures, vint& begin, vint& end, collections::List<Ptr<ParsingError>>& errors)
			{
				begin=end;
			}

			vint ParsingAmbiguousParser::GetResolvableFutureLevels(collections::List<ParsingState::Future*>& futures, vint begin, vint end)
			{
				if(end-begin<2)
				{
					return 1;
				}
				List<ParsingState::Future*> resolvingFutures;
				for(vint i=begin;i<end;i++)
				{
					resolvingFutures.Add(futures[i]);
				}

				vint level=0;
				while(true)
				{
					for(vint i=0;i<resolvingFutures.Count()-1;i++)
					{
						ParsingState::Future* first=resolvingFutures[i];
						ParsingState::Future* second=resolvingFutures[i+1];

						if(first->currentState!=second->currentState
							|| first->reduceStateCount!=second->reduceStateCount
							|| first->shiftStates.Count()!=second->shiftStates.Count()
							)
						{
							return level;
						}
						else
						{
							for(vint j=0;j<first->shiftStates.Count();j++)
							{
								if(first->shiftStates[j]!=second->shiftStates[j])
								{
									return level;
								}
							}
						}
					}
					level++;

					for(vint i=0;i<resolvingFutures.Count();i++)
					{
						if(!(resolvingFutures[i]=resolvingFutures[i]->previous))
						{
							return level;
						}
					}
				}
			}

			vint ParsingAmbiguousParser::SearchPathForOneStep(ParsingState& state, collections::List<ParsingState::Future*>& futures, vint& begin, vint& end, collections::List<Ptr<ParsingError>>& errors)
			{
				futures.Add(state.ExploreCreateRootFuture());
				vint previousBegin = 0;
				vint previousEnd = 1;
				vint resolvableFutureLevels = 0;
				bool errorRecovered = false;

				while(true)
				{
					// keep all futures that consumed a token in a list
					List<ParsingState::Future*> consumedTokenFutures;
					vint processBegin = previousBegin;
					vint processEnd = previousEnd;
					while (processEnd > processBegin)
					{
						// explore the current token
						if (state.ExploreStep(futures, processBegin, processEnd - processBegin, futures))
						{
							CopyFrom(
								consumedTokenFutures,
								From(futures)
									.Skip(processEnd)
									.Take(futures.Count() - processEnd),
								true
								);
							futures.RemoveRange(processEnd, futures.Count() - processEnd);
						}

						// explore left recursive reduce and normal reduce
						state.ExploreLeftRecursiveReduce(futures, processBegin, processEnd - processBegin, futures);
						state.ExploreNormalReduce(futures, processBegin, processEnd - processBegin, futures);

						// if a token is consumed, then for those reduce futures, explore them until a token is consumed, and discard all failed futures
						processBegin = processEnd;
						processEnd = futures.Count();
					}

					if (consumedTokenFutures.Count() == 0)
					{
						// failed to get any future that consumed a token, do error recovering
						vint tokenIndex = state.GetCurrentTableTokenIndex();
						OnErrorRecover(state, tokenIndex, futures, previousBegin, previousEnd, errors);
						if (previousBegin == previousEnd)
						{
							break;
						}
					}
					else
					{
						state.SkipCurrentToken();
						// put all futures that consumed a token from consumedTokenFutures back to future list
						previousBegin = futures.Count();
						CopyFrom(futures, consumedTokenFutures, true);
						previousEnd = futures.Count();

						// resolve all futures and see if all futures collapsed into a equivalent single future
						resolvableFutureLevels = GetResolvableFutureLevels(futures, previousBegin, previousEnd);
						if (resolvableFutureLevels != 0)
						{
							break;
						}
					}
				}

				begin = previousBegin;
				end = previousEnd;
				return resolvableFutureLevels;
			}

			vint ParsingAmbiguousParser::GetConflictReduceCount(collections::List<ParsingState::Future*>& futures)
			{
				vint conflictReduceCount=-1;
				for(vint i=0;i<futures.Count()-1;i++)
				{
					vint count=0;
					ParsingState::Future* first=futures[i];
					ParsingState::Future* second=futures[i+1];
					vint firstIndex=first->selectedItem->instructions.Count();
					vint secondIndex=second->selectedItem->instructions.Count();
					while(--firstIndex>=0 && --secondIndex>=0)
					{
						ParsingTable::Instruction* firstIns=&first->selectedItem->instructions[firstIndex];
						ParsingTable::Instruction* secondIns=&second->selectedItem->instructions[secondIndex];
						if(firstIns && secondIns)
						{
							if(firstIns->instructionType==secondIns->instructionType
								&& firstIns->nameParameter==secondIns->nameParameter
								&& firstIns->stateParameter==secondIns->stateParameter
								&& firstIns->value==secondIns->value
								)
							{
								if(firstIns->instructionType==ParsingTable::Instruction::Reduce || firstIns->instructionType==ParsingTable::Instruction::LeftRecursiveReduce)
								{
									count++;
								}
								continue;
							}
						}
						break;
					}
					if(conflictReduceCount==-1 || conflictReduceCount>count)
					{
						conflictReduceCount=count;
					}
				}
				if(conflictReduceCount==-1)
				{
					conflictReduceCount=0;
				}
				return conflictReduceCount;
			}

			void ParsingAmbiguousParser::GetConflictReduceIndices(collections::List<ParsingState::Future*>& futures, vint conflictReduceCount, collections::Array<vint>& conflictReduceIndices)
			{
				conflictReduceIndices.Resize(futures.Count());
				for(vint i=0;i<futures.Count();i++)
				{
					ParsingState::Future* future=futures[i];
					vint index=future->selectedItem->instructions.Count();
					vint count=0;
					while(count<conflictReduceCount && index>0)
					{
						switch(future->selectedItem->instructions[--index].instructionType)
						{
						case ParsingTable::Instruction::Reduce:
						case ParsingTable::Instruction::LeftRecursiveReduce:
							count++;
							break;
						default:;
						}
					}
					conflictReduceIndices[i]=index;
				}
			}
			vint ParsingAmbiguousParser::GetAffectedStackNodeCount(collections::List<ParsingState::Future*>& futures, collections::Array<vint>& conflictReduceIndices)
			{
				vint affectedStackNodeCount=-1;
				for(vint i=0;i<futures.Count();i++)
				{
					ParsingState::Future* future=futures[i];
					vint count=1;
					while(future && future->selectedItem)
					{
						vint start=(future==futures[i]?conflictReduceIndices[i]:future->selectedItem->instructions.Count())-1;
						for(vint j=start;j>=0;j--)
						{
							switch(future->selectedItem->instructions[j].instructionType)
							{
							case ParsingTable::Instruction::Reduce:
								count++;
								break;
							case ParsingTable::Instruction::Shift:
								count--;
								break;
							default:;
							}
						}
						future=future->previous;
					}

					if(affectedStackNodeCount==-1)
					{
						affectedStackNodeCount=count;
					}
					else if(affectedStackNodeCount!=count)
					{
						return -1;
					}
				}
				return affectedStackNodeCount;
			}

			void ParsingAmbiguousParser::BuildSingleDecisionPath(ParsingState& state, ParsingState::Future* future, vint lastAvailableInstructionCount)
			{
				List<Pair<ParsingTable::TransitionItem*, regex::RegexToken*>> path;
				while(future && future->selectedToken!=-1)
				{
					path.Add(Pair<ParsingTable::TransitionItem*, regex::RegexToken*>(future->selectedItem, future->selectedRegexToken));
					future = future->previous;
				}

				for (vint j = path.Count() - 1; j >= 0; j--)
				{
					if(j==0 && lastAvailableInstructionCount!=-1)
					{
						decisions.Add(state.RunTransition(path[j].key, path[j].value, 0, lastAvailableInstructionCount, false));
					}
					else
					{
						decisions.Add(state.RunTransition(path[j].key, path[j].value));
					}
				}
			}

			void ParsingAmbiguousParser::BuildAmbiguousDecisions(ParsingState& state, collections::List<ParsingState::Future*>& futures, vint begin, vint end, vint resolvableFutureLevels, collections::List<Ptr<ParsingError>>& errors)
			{
				List<ParsingState::Future*> resolvingFutures;
				CopyFrom(
					resolvingFutures,
					From(futures)
						.Skip(begin)
						.Take(end - begin)
					);
				for (vint i = 1; i < resolvableFutureLevels; i++)
				{
					for(vint j=0;j<resolvingFutures.Count();j++)
					{
						resolvingFutures[j] = resolvingFutures[j]->previous;
					}
				}

				Array<vint> conflictReduceIndices;
				vint conflictReduceCount=GetConflictReduceCount(resolvingFutures);
				GetConflictReduceIndices(resolvingFutures, conflictReduceCount, conflictReduceIndices);

				WString ambiguityNodeType, ambiguityRuleName;
				if(resolvingFutures[0]->selectedItem->instructions.Count()==conflictReduceIndices[0])
				{
					vint rootStartState=state.GetParsingRuleStartState();
					ambiguityNodeType=state.GetTable()->GetStateInfo(rootStartState).ruleAmbiguousType;
					ambiguityRuleName=state.GetParsingRule();
				}
				else
				{
					ParsingTable::Instruction& ins=resolvingFutures[0]->selectedItem->instructions[conflictReduceIndices[0]];
					ambiguityNodeType=state.GetTable()->GetStateInfo(ins.stateParameter).ruleAmbiguousType;
					ambiguityRuleName=state.GetTable()->GetStateInfo(ins.stateParameter).ruleName;
				}
				if(ambiguityNodeType==L"")
				{
					const RegexToken* token=state.GetToken(state.GetCurrentToken());
					errors.Add(Ptr(new ParsingError(token, L"Ambiguity happens when reducing rule \""+ambiguityRuleName+L"\" but this rule does not have an associated ambiguous node type.")));
					return;
				}

				vint affectedStackNodeCount=GetAffectedStackNodeCount(resolvingFutures, conflictReduceIndices);
				if(affectedStackNodeCount==-1)
				{
					const RegexToken* token=state.GetToken(state.GetCurrentToken());
					errors.Add(Ptr(new ParsingError(token, (token==0?L"Failed to pass ambiguity checking during parsing when reaching to the end of the input.":L"Failed to pass ambiguity checking during parsing."))));
					return;
				}

				Ptr<ParsingState::StateGroup> stateGroup;
				for(vint i=0;i<resolvingFutures.Count();i++)
				{
					if(stateGroup)
					{
						state.RestoreSnapshot(stateGroup);
					}
					else
					{
						stateGroup=state.TakeSnapshot();
					}
					{
						ParsingState::TransitionResult result(
							i==0
							?ParsingState::TransitionResult::AmbiguityBegin
							:ParsingState::TransitionResult::AmbiguityBranch
							);
						if(i==0)
						{
							result.ambiguityAffectedStackNodeCount=affectedStackNodeCount;
						}
						decisions.Add(result);
					}
					{
						BuildSingleDecisionPath(state, resolvingFutures[i], conflictReduceIndices[i]);

						if(i==resolvingFutures.Count()-1)
						{
							ParsingState::TransitionResult result(ParsingState::TransitionResult::AmbiguityEnd);
							result.ambiguityNodeType=ambiguityNodeType;
							decisions.Add(result);

							vint start=conflictReduceIndices[i];
							ParsingState::TransitionResult lastDecision=decisions[decisions.Count()-2];
							decisions.Add(state.RunTransition(lastDecision.transition, lastDecision.token, start, lastDecision.transition->instructions.Count()-start, true));
						}
					}
				}

				ParsingState::Future* lastFuture=futures[end-1];
				ParsingState::Future** futureCleaner=&lastFuture;
				for(int i=1;i<resolvableFutureLevels;i++)
				{
					futureCleaner=&(*futureCleaner)->previous;
				}
				*futureCleaner=0;

				if(lastFuture)
				{
					BuildSingleDecisionPath(state, lastFuture, -1);
				}
			}

			void ParsingAmbiguousParser::BuildDecisions(ParsingState& state, collections::List<ParsingState::Future*>& futures, vint begin, vint end, vint resolvableFutureLevels, collections::List<Ptr<ParsingError>>& errors)
			{
				if(end-begin==0)
				{
					const RegexToken* token=state.GetToken(state.GetCurrentToken());
					errors.Add(Ptr(new ParsingError(token, (token==0?L"Error happened during parsing when reaching to the end of the input.":L"Error happened during parsing."))));
				}
				else if(end-begin==1)
				{
					BuildSingleDecisionPath(state, futures[begin], -1);
				}
				else
				{
					BuildAmbiguousDecisions(state, futures, begin, end, resolvableFutureLevels, errors);
				}
			}
			
			ParsingState::TransitionResult ParsingAmbiguousParser::ParseStep(ParsingState& state, collections::List<Ptr<ParsingError>>& errors)
			{
				if(decisions.Count()==consumedDecisionCount)
				{
					List<ParsingState::Future*> futures;
					vint resultBegin=0;
					vint resultEnd=0;

					vint resolvableFutureLevels=SearchPathForOneStep(state, futures, resultBegin, resultEnd, errors);
					BuildDecisions(state, futures, resultBegin, resultEnd, resolvableFutureLevels, errors);

					for (auto future : futures)
					{
						delete future;
					}
				}

				if(decisions.Count()>consumedDecisionCount)
				{
					ParsingState::TransitionResult result=decisions[consumedDecisionCount++];
					if(consumedDecisionCount==decisions.Count())
					{
						decisions.Clear();
						consumedDecisionCount=0;
					}
					return result;
				}
				else
				{
					return ParsingState::TransitionResult();
				}
			}

			void ParsingAmbiguousParser::BeginParse()
			{
				decisions.Clear();
				consumedDecisionCount=0;
				ParsingGeneralParser::BeginParse();
			}

/***********************************************************************
ParsingAutoRecoverAmbiguousParser
***********************************************************************/

			void ParsingAutoRecoverAmbiguousParser::OnErrorRecover(ParsingState& state, vint currentTokenIndex, collections::List<ParsingState::Future*>& futures, vint& begin, vint& end, collections::List<Ptr<ParsingError>>& errors)
			{
				vint insertedTokenCount = 0;
				while (insertedTokenCount++ < maxInsertedTokenCount)
				{
					// keep all futures that consumed a token in a list
					List<ParsingState::Future*> consumedTokenFutures;
					vint processBegin = begin;
					vint processEnd = end;
					while (processEnd > processBegin)
					{
						// explore all tokens
						for (vint i = processBegin; i < processEnd; i++)
						{
							state.Explore(ParsingTable::TokenFinish, futures[i], futures);
							for (vint token = ParsingTable::UserTokenStart; token < state.GetTable()->GetTokenCount(); token++)
							{
								state.Explore(token, futures[i], futures);
							}
						}
						// copy all futures that consumed a token to consumedTokenFutures
						if (futures.Count() > processEnd)
						{
							CopyFrom(
								consumedTokenFutures,
								From(futures)
									.Skip(processEnd)
									.Take(futures.Count() - processEnd),
								true
								);
							futures.RemoveRange(processEnd, futures.Count() - processEnd);
						}

						// explore left recursive reduce and normal reduce
						state.ExploreLeftRecursiveReduce(futures, processBegin, processEnd - processBegin, futures);
						state.ExploreNormalReduce(futures, processBegin, processEnd - processBegin, futures);

						// if a token is consumed, then for those reduce futures, explore them until a token is consumed, and discard all failed futures
						processBegin = processEnd;
						processEnd = futures.Count();
					}

					if (consumedTokenFutures.Count() == 0)
					{
						// failed to get any future that consumed a token
						goto ERROR_RECOVERY_FAILED;
					}
					else
					{
						// try to see if the target token is reached
						List<ParsingState::Future*> recoveryFutures;
						for (auto future : consumedTokenFutures)
						{
							if (future->selectedToken == currentTokenIndex)
							{
								// because this is reached by error recoverying, so all futures in availableFutures should have previous futures
								recoveryFutures.Add(future->previous);
							}
						}

						if (recoveryFutures.Count()>0)
						{
							// finally reached the expected currentTokenIndex
							// move these previous futures to the end
							// then the original parser algorith, will use these previous futures to reach the currentTokenIndex in the next step
							for (auto future : recoveryFutures)
							{
								futures.Remove(future);
								futures.Add(future);
							}
							begin = futures.Count() - recoveryFutures.Count();
							end = futures.Count();

							// delete all futures in consumedTokenFutures
							for (auto future : consumedTokenFutures)
							{
								delete future;
							}
							goto ERROR_RECOVERY_SUCCEEDED;
						}
						else
						{
							// put all futures that consumed a token from consumedTokenFutures back to future list
							begin = futures.Count();
							CopyFrom(futures, consumedTokenFutures, true);
							end = futures.Count();
						}
					}
				}
				// if the maxInsertedTokenCount is exceeded, then we get here
			ERROR_RECOVERY_FAILED:
				begin = end = futures.Count();
				return;
			ERROR_RECOVERY_SUCCEEDED:
				return;
			}

			ParsingAutoRecoverAmbiguousParser::ParsingAutoRecoverAmbiguousParser(Ptr<ParsingTable> _table, vint _maxInsertedTokenCount)
				:ParsingAmbiguousParser(_table)
				, maxInsertedTokenCount(_maxInsertedTokenCount == -1 ? 4 : _maxInsertedTokenCount)
			{
			}

			ParsingAutoRecoverAmbiguousParser::~ParsingAutoRecoverAmbiguousParser()
			{
			}

/***********************************************************************
Helper Functions
***********************************************************************/

			Ptr<ParsingGeneralParser> CreateStrictParser(Ptr<ParsingTable> table)
			{
				if(table)
				{
					if(table->GetAmbiguity())
					{
						return Ptr(new ParsingAmbiguousParser(table));
					}
					else
					{
						return Ptr(new ParsingStrictParser(table));
					}
				}
				else
				{
					return 0;
				}
			}

			Ptr<ParsingGeneralParser> CreateAutoRecoverParser(Ptr<ParsingTable> table)
			{
				if(table)
				{
					if(table->GetAmbiguity())
					{
						return Ptr(new ParsingAutoRecoverAmbiguousParser(table));
					}
					else
					{
						return Ptr(new ParsingAutoRecoverParser(table));
					}
				}
				else
				{
					return 0;
				}
			}

			Ptr<ParsingGeneralParser> CreateBootstrapStrictParser()
			{
				List<Ptr<ParsingError>> errors;
				Ptr<ParsingDefinition> definition=CreateParserDefinition();
				Ptr<ParsingTable> table=GenerateTable(definition, false, errors);
				return CreateStrictParser(table);
			}

			Ptr<ParsingGeneralParser> CreateBootstrapAutoRecoverParser()
			{
				List<Ptr<ParsingError>> errors;
				Ptr<ParsingDefinition> definition=CreateParserDefinition();
				Ptr<ParsingTable> table=GenerateTable(definition, false, errors);
				return CreateAutoRecoverParser(table);
			}
		}
	}
}

/***********************************************************************
Reflection
***********************************************************************/

#ifndef VCZH_DEBUG_NO_REFLECTION

namespace vl
{
	namespace reflection
	{
		namespace description
		{
			using namespace parsing;

			PARSINGREFLECTION_TYPELIST(IMPL_VL_TYPE_INFO)

/***********************************************************************
Type Declaration
***********************************************************************/

#ifdef VCZH_DESCRIPTABLEOBJECT_WITH_METADATA
#define _ ,

			BEGIN_STRUCT_MEMBER(ParsingTextPos)
				STRUCT_MEMBER(index)
				STRUCT_MEMBER(row)
				STRUCT_MEMBER(column)
			END_STRUCT_MEMBER(ParsingTextPos)

			BEGIN_STRUCT_MEMBER(ParsingTextRange)
				STRUCT_MEMBER(start)
				STRUCT_MEMBER(end)
			END_STRUCT_MEMBER(ParsingTextRange)

			BEGIN_CLASS_MEMBER(ParsingTreeNode)
				CLASS_MEMBER_PROPERTY_FAST(CodeRange)
				CLASS_MEMBER_PROPERTY_READONLY_FAST(Parent)
				CLASS_MEMBER_PROPERTY_READONLY_FAST(SubNodes)

				CLASS_MEMBER_METHOD(Clone, NO_PARAMETER)
				CLASS_MEMBER_METHOD(InitializeQueryCache, NO_PARAMETER)
				CLASS_MEMBER_METHOD(ClearQueryCache, NO_PARAMETER)
				CLASS_MEMBER_METHOD_OVERLOAD(FindSubNode, {L"position"}, ParsingTreeNode*(ParsingTreeNode::*)(const ParsingTextPos&))
				CLASS_MEMBER_METHOD_OVERLOAD(FindSubNode, {L"range"}, ParsingTreeNode*(ParsingTreeNode::*)(const ParsingTextRange&))
				CLASS_MEMBER_METHOD_OVERLOAD(FindDeepestNode, {L"position"}, ParsingTreeNode*(ParsingTreeNode::*)(const ParsingTextPos&))
				CLASS_MEMBER_METHOD_OVERLOAD(FindDeepestNode, {L"range"}, ParsingTreeNode*(ParsingTreeNode::*)(const ParsingTextRange&))
			END_CLASS_MEMBER(ParsingTreeNode)

			BEGIN_CLASS_MEMBER(ParsingTreeToken)
				CLASS_MEMBER_CONSTRUCTOR(Ptr<ParsingTreeToken>(const WString&, vint), {L"value" _ L"tokenIndex"})

				CLASS_MEMBER_PROPERTY_FAST(TokenIndex)
				CLASS_MEMBER_PROPERTY_FAST(Value)
			END_CLASS_MEMBER(ParsingTreeToken)

			BEGIN_CLASS_MEMBER(ParsingTreeObject)
				CLASS_MEMBER_CONSTRUCTOR(Ptr<ParsingTreeObject>(const WString&), {L"type"})

				CLASS_MEMBER_PROPERTY_FAST(Type)
				CLASS_MEMBER_PROPERTY_READONLY_FAST(Members)
				CLASS_MEMBER_PROPERTY_READONLY_FAST(MemberNames)
				CLASS_MEMBER_PROPERTY_READONLY_FAST(CreatorRules)

				CLASS_MEMBER_METHOD(GetMember, {L"name"})
				CLASS_MEMBER_METHOD(SetMember, {L"name" _ L"node"})
			END_CLASS_MEMBER(ParsingTreeObject)

			BEGIN_CLASS_MEMBER(ParsingTreeArray)
				CLASS_MEMBER_CONSTRUCTOR(Ptr<ParsingTreeObject>(const WString&), {L"elementType"})

				CLASS_MEMBER_PROPERTY_FAST(ElementType)
				CLASS_MEMBER_PROPERTY_READONLY_FAST(Items)

				CLASS_MEMBER_METHOD(GetItem, {L"index"})
				CLASS_MEMBER_METHOD(SetItem, {L"index" _ L"node"})
				CLASS_MEMBER_METHOD(AddItem, {L"node"})
				CLASS_MEMBER_METHOD(InsertItem, {L"index" _ L"node"})
				CLASS_MEMBER_METHOD_OVERLOAD(RemoveItem, {L"index"}, bool(ParsingTreeArray::*)(vint))
				CLASS_MEMBER_METHOD_OVERLOAD(RemoveItem, {L"node"}, bool(ParsingTreeArray::*)(ParsingTreeNode*))
				CLASS_MEMBER_METHOD(IndexOfItem, {L"node"})
				CLASS_MEMBER_METHOD(ContainsItem, {L"node"})
				CLASS_MEMBER_METHOD(Clone, NO_PARAMETER)

				CLASS_MEMBER_METHOD_RENAME(GetCount, Count, NO_PARAMETER)
				CLASS_MEMBER_PROPERTY_READONLY(Count, GetCount)
			END_CLASS_MEMBER(ParsingTreeArray)

			BEGIN_CLASS_MEMBER(ParsingTreeCustomBase)
				CLASS_MEMBER_FIELD(codeRange)
				CLASS_MEMBER_FIELD(creatorRules)
			END_CLASS_MEMBER(ParsingTreeCustomBase)

			BEGIN_CLASS_MEMBER(ParsingToken)
				CLASS_MEMBER_BASE(ParsingTreeCustomBase)

				CLASS_MEMBER_FIELD(tokenIndex)
				CLASS_MEMBER_FIELD(value)
			END_CLASS_MEMBER(ParsingToken)

			BEGIN_CLASS_MEMBER(ParsingError)
				CLASS_MEMBER_CONSTRUCTOR(Ptr<ParsingError>(), NO_PARAMETER)
				CLASS_MEMBER_CONSTRUCTOR(Ptr<ParsingError>(const WString&), {L"errorMessage"})
				CLASS_MEMBER_CONSTRUCTOR(Ptr<ParsingError>(ParsingTreeCustomBase*, const WString&), {L"parsingTree" _ L"errorMessage"})

				CLASS_MEMBER_FIELD(codeRange)
				CLASS_MEMBER_FIELD(parsingTree)
				CLASS_MEMBER_FIELD(errorMessage)
			END_CLASS_MEMBER(ParsingError)
#undef _
#endif
		}
	}
}

#endif

namespace vl
{
	namespace reflection
	{
		namespace description
		{

/***********************************************************************
Type Loader
***********************************************************************/
			
#ifdef VCZH_DESCRIPTABLEOBJECT_WITH_METADATA
			class ParsingTypeLoader : public Object, public ITypeLoader
			{
			public:
				void Load(ITypeManager* manager)
				{
					PARSINGREFLECTION_TYPELIST(ADD_TYPE_INFO)
				}

				void Unload(ITypeManager* manager)
				{
				}
			};
#endif

			bool LoadParsingTypes()
			{
#ifdef VCZH_DESCRIPTABLEOBJECT_WITH_METADATA
				ITypeManager* manager=GetGlobalTypeManager();
				if(manager)
				{
					auto loader = Ptr(new ParsingTypeLoader);
					return manager->AddTypeLoader(loader);
				}
#endif
				return false;
			}
		}
	}
}

/***********************************************************************
.\PARSINGANALYZER.CPP
***********************************************************************/
/***********************************************************************
Author: Zihan Chen (vczh)
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	namespace parsing
	{
		using namespace collections;
		using namespace definitions;

		namespace analyzing
		{

/***********************************************************************
ParsingSymbol
***********************************************************************/

			bool ParsingSymbol::AddSubSymbol(ParsingSymbol* subSymbol)
			{
				if(subSymbol->GetParentSymbol()) return false;
				if(subSymbolMap.Keys().IndexOf(subSymbol->GetName())!=-1) return false;
				switch(type)
				{
				case Global:
					switch(subSymbol->GetType())
					{
					case EnumType:		break;
					case ClassType:		break;
					case TokenDef:		break;
					case RuleDef:		break;
					default:			return false;
					}
					break;
				case EnumType:
					switch(subSymbol->GetType())
					{
					case EnumItem:		break;
					default:			return false;
					}
					break;
				case ClassType:
					switch(subSymbol->GetType())
					{
					case EnumType:		
					case ClassType:
					case ClassField:	break;
					default:			return false;
					}
					break;
				default:				return false;
				}

				subSymbol->parentSymbol=this;
				subSymbolList.Add(subSymbol);
				subSymbolMap.Add(subSymbol->GetName(), subSymbol);
				return true;
			}

			ParsingSymbol::ParsingSymbol(ParsingSymbolManager* _manager, SymbolType _type, const WString& _name, ParsingSymbol* _descriptorSymbol, const WString& _descriptorString)
				:manager(_manager)
				,type(_type)
				,name(_name)
				,descriptorSymbol(_descriptorSymbol)
				,descriptorString(_descriptorString)
				,parentSymbol(0)
				,arrayTypeSymbol(0)
			{
			}

			ParsingSymbol::~ParsingSymbol()
			{
			}

			ParsingSymbolManager* ParsingSymbol::GetManager()
			{
				return manager;
			}

			ParsingSymbol::SymbolType ParsingSymbol::GetType()
			{
				return type;
			}

			const WString& ParsingSymbol::GetName()
			{
				return name;
			}

			vint ParsingSymbol::GetSubSymbolCount()
			{
				return subSymbolList.Count();
			}

			ParsingSymbol* ParsingSymbol::GetSubSymbol(vint index)
			{
				if(0<=index && index<subSymbolList.Count())
				{
					return subSymbolList[index];
				}
				else
				{
					return 0;
				}
			}

			ParsingSymbol* ParsingSymbol::GetSubSymbolByName(const WString& name)
			{
				vint index=subSymbolMap.Keys().IndexOf(name);
				if(index==-1)
				{
					return 0;
				}
				else
				{
					return subSymbolMap.Values().Get(index);
				}
			}

			ParsingSymbol* ParsingSymbol::GetDescriptorSymbol()
			{
				return descriptorSymbol;
			}

			WString ParsingSymbol::GetDescriptorString()
			{
				return descriptorString;
			}

			ParsingSymbol* ParsingSymbol::GetParentSymbol()
			{
				return parentSymbol;
			}

			bool ParsingSymbol::IsType()
			{
				switch(type)
				{
				case ParsingSymbol::ClassType:
				case ParsingSymbol::EnumType:
				case ParsingSymbol::ArrayType:
				case ParsingSymbol::TokenType:
					return true;
				default:
					return false;
				}
			}

			ParsingSymbol* ParsingSymbol::SearchClassSubSymbol(const WString& name)
			{
				if(type==ParsingSymbol::ClassType)
				{
					ParsingSymbol* scope=this;
					while(scope)
					{
						ParsingSymbol* subSymbol=scope->GetSubSymbolByName(name);
						if(subSymbol)
						{
							return subSymbol;
						}
						else
						{
							scope=scope->GetDescriptorSymbol();
						}
					}
				}
				return 0;
			}

			ParsingSymbol* ParsingSymbol::SearchCommonBaseClass(ParsingSymbol* classType)
			{
				if(type==ParsingSymbol::ClassType && classType->GetType()==ParsingSymbol::ClassType)
				{
					vint aCount=0;
					vint bCount=0;
					ParsingSymbol* a=this;
					ParsingSymbol* b=classType;
					while(a || b)
					{
						if(a)
						{
							aCount++;
							a=a->GetDescriptorSymbol();
						}
						if(b)
						{
							bCount++;
							b=b->GetDescriptorSymbol();
						}
					}

					a=this;
					b=classType;
					vint min=aCount<bCount?aCount:bCount;
					for(vint i=aCount;i>min;i--)
					{
						a=a->GetDescriptorSymbol();
					}
					for(vint i=bCount;i>min;i--)
					{
						b=b->GetDescriptorSymbol();
					}

					while(a!=b)
					{
						a=a->GetDescriptorSymbol();
						b=b->GetDescriptorSymbol();
					}
					return a;
				}
				return 0;
			}

/***********************************************************************
ParsingSymbolManager
***********************************************************************/

			bool ParsingSymbolManager::TryAddSubSymbol(Ptr<ParsingSymbol> subSymbol, ParsingSymbol* parentSymbol)
			{
				if(parentSymbol->AddSubSymbol(subSymbol.Obj()))
				{
					createdSymbols.Add(subSymbol);
					return true;
				}
				return false;
			}

			ParsingSymbolManager::ParsingSymbolManager()
			{
				globalSymbol=new ParsingSymbol(this, ParsingSymbol::Global, L"", 0, L"");
				tokenTypeSymbol=new ParsingSymbol(this, ParsingSymbol::TokenType, L"token", 0, L"");
				createdSymbols.Add(Ptr(globalSymbol));
				createdSymbols.Add(Ptr(tokenTypeSymbol));
			}

			ParsingSymbolManager::~ParsingSymbolManager()
			{
			}

			ParsingSymbol* ParsingSymbolManager::GetGlobal()
			{
				return globalSymbol;
			}

			ParsingSymbol* ParsingSymbolManager::GetTokenType()
			{
				return tokenTypeSymbol;
			}

			ParsingSymbol* ParsingSymbolManager::GetArrayType(ParsingSymbol* elementType)
			{
				if(elementType->IsType())
				{
					if(!elementType->arrayTypeSymbol)
					{
						elementType->arrayTypeSymbol=new ParsingSymbol(this, ParsingSymbol::ArrayType, L"", elementType, L"");
						createdSymbols.Add(Ptr(elementType->arrayTypeSymbol));
					}
					return elementType->arrayTypeSymbol;
				}
				else
				{
					return nullptr;
				}
			}

			ParsingSymbol* ParsingSymbolManager::AddClass(definitions::ParsingDefinitionClassDefinition* classDef, ParsingSymbol* baseType, ParsingSymbol* parentType)
			{
				if((!baseType || baseType->GetType()==ParsingSymbol::ClassType) && (!parentType || parentType->IsType()))
				{
					auto symbol = Ptr(new ParsingSymbol(this, ParsingSymbol::ClassType, classDef->name, baseType, L""));
					if(TryAddSubSymbol(symbol, parentType?parentType:globalSymbol))
					{
						symbolClassDefinitionCache.Add(symbol.Obj(), classDef);
						classDefinitionSymbolCache.Add(classDef, symbol.Obj());
						return symbol.Obj();
					}
				}
				return nullptr;
			}

			ParsingSymbol* ParsingSymbolManager::AddField(const WString& name, ParsingSymbol* classType, ParsingSymbol* fieldType)
			{
				if(classType && classType->GetType()==ParsingSymbol::ClassType && fieldType && fieldType->IsType())
				{
					auto symbol = Ptr(new ParsingSymbol(this, ParsingSymbol::ClassField, name, fieldType, L""));
					if(TryAddSubSymbol(symbol, classType))
					{
						return symbol.Obj();
					}
				}
				return nullptr;
			}

			ParsingSymbol* ParsingSymbolManager::AddEnum(const WString& name, ParsingSymbol* parentType)
			{
				if(!parentType || parentType->GetType()==ParsingSymbol::ClassType)
				{
					auto symbol = Ptr(new ParsingSymbol(this, ParsingSymbol::EnumType, name, 0, L""));
					if(TryAddSubSymbol(symbol, parentType?parentType:globalSymbol))
					{
						return symbol.Obj();
					}
				}
				return nullptr;
			}

			ParsingSymbol* ParsingSymbolManager::AddEnumItem(const WString& name, ParsingSymbol* enumType)
			{
				if(enumType && enumType->GetType()==ParsingSymbol::EnumType)
				{
					auto symbol = Ptr(new ParsingSymbol(this, ParsingSymbol::EnumItem, name, enumType, L""));
					if(TryAddSubSymbol(symbol, enumType))
					{
						return symbol.Obj();
					}
				}
				return nullptr;
			}

			ParsingSymbol* ParsingSymbolManager::AddTokenDefinition(const WString& name, const WString& regex)
			{
				auto symbol = Ptr(new ParsingSymbol(this, ParsingSymbol::TokenDef, name, tokenTypeSymbol, regex));
				if(TryAddSubSymbol(symbol, globalSymbol))
				{
					return symbol.Obj();
				}
				return nullptr;
			}

			ParsingSymbol* ParsingSymbolManager::AddRuleDefinition(const WString& name, ParsingSymbol* ruleType)
			{
				if(ruleType && ruleType->IsType())
				{
					auto symbol = Ptr(new ParsingSymbol(this, ParsingSymbol::RuleDef, name, ruleType, L""));
					if(TryAddSubSymbol(symbol, globalSymbol))
					{
						return symbol.Obj();
					}
				}
				return nullptr;
			}

			ParsingSymbolManager::ClassDefinition* ParsingSymbolManager::CacheGetClassDefinition(ParsingSymbol* type)
			{
				vint index=symbolClassDefinitionCache.Keys().IndexOf(type);
				return index==-1?0:symbolClassDefinitionCache.Values().Get(index);
			}

			ParsingSymbol* ParsingSymbolManager::CacheGetClassType(ClassDefinition* type)
			{
				vint index=classDefinitionSymbolCache.Keys().IndexOf(type);
				return index==-1?0:classDefinitionSymbolCache.Values().Get(index);
			}

			ParsingSymbol* ParsingSymbolManager::CacheGetType(definitions::ParsingDefinitionType* type, ParsingSymbol* scope)
			{
				DefinitionTypeScopePair key(type, scope);
				vint index=definitionTypeSymbolCache.Keys().IndexOf(key);
				return index==-1?0:definitionTypeSymbolCache.Values().Get(index);
			}

			bool ParsingSymbolManager::CacheSetType(definitions::ParsingDefinitionType* type, ParsingSymbol* scope, ParsingSymbol* symbol)
			{
				DefinitionTypeScopePair key(type, scope);
				vint index=definitionTypeSymbolCache.Keys().IndexOf(key);
				if(index==-1)
				{
					definitionTypeSymbolCache.Add(key, symbol);
					return true;
				}
				else
				{
					return false;
				}
			}

			ParsingSymbol* ParsingSymbolManager::CacheGetSymbol(definitions::ParsingDefinitionGrammar* grammar)
			{
				vint index=definitionGrammarSymbolCache.Keys().IndexOf(grammar);
				return index==-1?0:definitionGrammarSymbolCache.Values().Get(index);
			}

			bool ParsingSymbolManager::CacheSetSymbol(definitions::ParsingDefinitionGrammar* grammar, ParsingSymbol* symbol)
			{
				vint index=definitionGrammarSymbolCache.Keys().IndexOf(grammar);
				if(index==-1)
				{
					definitionGrammarSymbolCache.Add(grammar, symbol);
					return true;
				}
				else
				{
					return false;
				}
			}

			ParsingSymbol* ParsingSymbolManager::CacheGetType(definitions::ParsingDefinitionGrammar* grammar)
			{
				vint index=definitionGrammarTypeCache.Keys().IndexOf(grammar);
				return index==-1?0:definitionGrammarTypeCache.Values().Get(index);
			}

			bool ParsingSymbolManager::CacheSetType(definitions::ParsingDefinitionGrammar* grammar, ParsingSymbol* type)
			{
				vint index=definitionGrammarTypeCache.Keys().IndexOf(grammar);
				if(index==-1)
				{
					definitionGrammarTypeCache.Add(grammar, type);
					return true;
				}
				else
				{
					return false;
				}
			}

/***********************************************************************
FindType
***********************************************************************/

			WString GetTypeFullName(ParsingSymbol* type)
			{
				if(type->GetType()==ParsingSymbol::ArrayType)
				{
					return GetTypeFullName(type->GetDescriptorSymbol())+L"[]";
				}
				else
				{
					WString name=type->GetName();
					type=type->GetParentSymbol();
					while(type && type!=type->GetManager()->GetGlobal())
					{
						name=type->GetName()+L"."+name;
						type=type->GetParentSymbol();
					}
					return name;
				}
			}

/***********************************************************************
FindType
***********************************************************************/

			class FindTypeVisitor : public Object, public ParsingDefinitionType::IVisitor
			{
			public:
				ParsingSymbolManager*				manager;
				ParsingSymbol*						scope;
				List<Ptr<ParsingError>>&			errors;
				ParsingSymbol*						result;

				FindTypeVisitor(ParsingSymbolManager* _manager, ParsingSymbol* _scope, List<Ptr<ParsingError>>& _errors)
					:manager(_manager)
					,scope(_scope)
					,errors(_errors)
					,result(0)
				{
				}

				void Visit(ParsingDefinitionPrimitiveType* node)override
				{
					ParsingSymbol* currentScope=scope;
					while(currentScope)
					{
						ParsingSymbol* type=currentScope->GetSubSymbolByName(node->name);
						if(type)
						{
							if(type->IsType())
							{
								result=type;
							}
							else
							{
								errors.Add(Ptr(new ParsingError(node, L"\"" + node->name + L"\" in current scope is not a type.")));
							}
							return;
						}
						currentScope=currentScope->GetParentSymbol();
					}
					errors.Add(Ptr(new ParsingError(node, L"Cannot not find \"" + node->name + L"\" in current scope.")));
				}

				void Visit(ParsingDefinitionTokenType* node)override
				{
					result=manager->GetTokenType();
				}

				void Visit(ParsingDefinitionSubType* node)override
				{
					ParsingSymbol* type=FindType(node->parentType.Obj(), manager, scope, errors);
					if(type)
					{
						ParsingSymbol* subType=type->SearchClassSubSymbol(node->subTypeName);
						if(!subType)
						{
							errors.Add(Ptr(new ParsingError(node, L"\"" + GetTypeFullName(type) + L"\" does not has a sub type called \"" + node->subTypeName + L"\".")));
						}
						else if(subType->IsType())
						{
							result=subType;
						}
						else
						{
							errors.Add(Ptr(new ParsingError(node, L"\"" + GetTypeFullName(type) + L"\" contains a sub definition called \"" + node->subTypeName + L"\" but this is not a type.")));
						}
					}
				}

				void Visit(ParsingDefinitionArrayType* node)override
				{
					ParsingSymbol* type=FindType(node->elementType.Obj(), manager, scope, errors);
					if(type)
					{
						result=manager->GetArrayType(type);
					}
				}
			};

			ParsingSymbol* FindType(definitions::ParsingDefinitionType* type, ParsingSymbolManager* manager, ParsingSymbol* scope, collections::List<Ptr<ParsingError>>& errors)
			{
				ParsingSymbol* result=manager->CacheGetType(type, scope);
				if(!result)
				{
					FindTypeVisitor visitor(manager, (scope?scope:manager->GetGlobal()), errors);
					type->Accept(&visitor);
					result=visitor.result;
					manager->CacheSetType(type, scope, result);
				}
				return result;
			}

/***********************************************************************
PrepareSymbols
***********************************************************************/

			class PrepareSymbolsTypeDefinitionVisitor : public Object, public ParsingDefinitionTypeDefinition::IVisitor
			{
			public:
				ParsingSymbolManager*				manager;
				ParsingSymbol*						scope;
				List<Ptr<ParsingError>>&			errors;

				PrepareSymbolsTypeDefinitionVisitor(ParsingSymbolManager* _manager, ParsingSymbol* _scope, List<Ptr<ParsingError>>& _errors)
					:manager(_manager)
					,scope(_scope)
					,errors(_errors)
				{
				}

				bool EnsureNameNotExists(ParsingDefinitionTypeDefinition* node, const WString& subjectName)
				{
					if(scope->SearchClassSubSymbol(node->name))
					{
						errors.Add(Ptr(new ParsingError(node, L"Cannot redefine \"" + node->name + L"\" to be " + subjectName + L".")));
						return false;
					}
					else
					{
						return true;
					}
				}

				void Visit(ParsingDefinitionClassMemberDefinition* node)override
				{
					if(EnsureNameNotExists(node, L"a class field"))
					{
						ParsingSymbol* fieldType=FindType(node->type.Obj(), manager, scope, errors);
						if(fieldType)
						{
							ParsingSymbol* field=manager->AddField(node->name, scope, fieldType);
							if(!field)
							{
								errors.Add(Ptr(new ParsingError(node, L"A class field cannot be defined here.")));
							}
						}
					}
				}

				void Visit(ParsingDefinitionClassDefinition* node)override
				{
					if(EnsureNameNotExists(node, L"a class type"))
					{
						ParsingSymbol* baseType=0;
						if(node->parentType)
						{
							baseType=FindType(node->parentType.Obj(), manager, scope, errors);
						}
						ParsingSymbol* classType=manager->AddClass(node, baseType, (scope->GetType()==ParsingSymbol::Global?0:scope));
						if(classType)
						{
							PrepareSymbolsTypeDefinitionVisitor visitor(manager, classType, errors);
							for (auto subType : node->subTypes)
							{
								subType->Accept(&visitor);
							}
							for (auto member : node->members)
							{
								member->Accept(&visitor);
							}
						}
						else
						{
							errors.Add(Ptr(new ParsingError(node, L"A class type cannot be defined here.")));
						}
					}
				}

				void Visit(ParsingDefinitionEnumMemberDefinition* node)override
				{
					if(EnsureNameNotExists(node, L"an enum item"))
					{
						ParsingSymbol* enumItem=manager->AddEnumItem(node->name, scope);
						if(!enumItem)
						{
							errors.Add(Ptr(new ParsingError(node, L"An enum item cannot be defined here.")));
						}
					}
				}

				void Visit(ParsingDefinitionEnumDefinition* node)override
				{
					if(EnsureNameNotExists(node, L"an enum type"))
					{
						ParsingSymbol* enumType=manager->AddEnum(node->name, (scope->GetType()==ParsingSymbol::Global?0:scope));
						if(enumType)
						{
							PrepareSymbolsTypeDefinitionVisitor visitor(manager, enumType, errors);
							for (auto member : node->members)
							{
								member->Accept(&visitor);
							}
						}
						else
						{
							errors.Add(Ptr(new ParsingError(node, L"An enum type cannot be defined here.")));
						}
					}
				}
			};

			void PrepareSymbols(Ptr<definitions::ParsingDefinition> definition, ParsingSymbolManager* manager, collections::List<Ptr<ParsingError>>& errors)
			{
				{
					PrepareSymbolsTypeDefinitionVisitor visitor(manager, manager->GetGlobal(), errors);
					for (auto typeDefinition : definition->types)
					{
						typeDefinition->Accept(&visitor);
					}
				}

				for (auto token : definition->tokens)
				{
					if(manager->GetGlobal()->GetSubSymbolByName(token->name))
					{
						errors.Add(Ptr(new ParsingError(token.Obj(), L"Cannot redefine \""+token->name+L"\" to be a token definition.")));
					}
					else
					{
						manager->AddTokenDefinition(token->name, token->regex);
						try
						{
							regex_internal::ParseRegexExpression(wtou32(token->regex));
						}
						catch(const regex_internal::RegexException& ex)
						{
							errors.Add(Ptr(new ParsingError(token.Obj(), L"Wrong token definition for \""+token->name+L"\": "+ex.Message())));
						}
					}
				}

				for (auto rule : definition->rules)
				{
					if(manager->GetGlobal()->GetSubSymbolByName(rule->name))
					{
						errors.Add(Ptr(new ParsingError(rule.Obj(), L"Cannot redefine \""+rule->name+L"\" to be a rule definition.")));
					}
					else
					{
						ParsingSymbol* type=FindType(rule->type.Obj(), manager, 0, errors);
						if(type)
						{
							if(type->GetType()!=ParsingSymbol::ClassType)
							{
								errors.Add(Ptr(new ParsingError(rule.Obj(), L"\""+GetTypeFullName(type)+L"\" cannot be a type of a rule because this is not a class type.")));
							}
							manager->AddRuleDefinition(rule->name, type);
						}
					}
				}
			}

/***********************************************************************
ValidateRuleStructure
***********************************************************************/

			class ValidateRuleStructureVisitor : public Object, public ParsingDefinitionGrammar::IVisitor
			{
			public:
				Ptr<ParsingDefinition>				definition;
				ParsingSymbolManager*				manager;
				ParsingDefinitionRuleDefinition*	rule;
				List<Ptr<ParsingError>>&			errors;
				vint								loopCount;

				ValidateRuleStructureVisitor(Ptr<ParsingDefinition> _definition, ParsingSymbolManager* _manager, ParsingDefinitionRuleDefinition* _rule, List<Ptr<ParsingError>>& _errors)
					:definition(_definition)
					,manager(_manager)
					,errors(_errors)
					,rule(_rule)
					,loopCount(0)
				{
				}

				void CheckCreationType(ParsingDefinitionGrammar* node, ParsingSymbol* nodeType)
				{
					if(nodeType->GetType()==ParsingSymbol::ClassType)
					{
						ParsingSymbol* ruleType=manager->GetGlobal()->GetSubSymbolByName(rule->name)->GetDescriptorSymbol();
						ParsingSymbol* currentType=nodeType;
						while(currentType && currentType!=ruleType)
						{
							currentType=currentType->GetDescriptorSymbol();
						}
						if(!currentType)
						{
							errors.Add(Ptr(new ParsingError(node, L"Cannot create type \""+GetTypeFullName(nodeType)+L"\" in a rule of type \""+GetTypeFullName(ruleType)+L"\" because there are no implicit conversions from the created type to the rule type.")));
						}
					}
					else
					{
						errors.Add(Ptr(new ParsingError(node, L"\""+GetTypeFullName(nodeType)+L"\" cannot be created because this is not a class type.")));
					}
				}

				void Visit(ParsingDefinitionPrimitiveGrammar* node)override
				{
					ParsingSymbol* symbol=manager->GetGlobal()->GetSubSymbolByName(node->name);
					if(!symbol)
					{
						errors.Add(Ptr(new ParsingError(node, L"Cannot find a token or a rule with name \""+node->name+L"\".")));
					}
					else switch(symbol->GetType())
					{
					case ParsingSymbol::TokenDef:
						{
							bool discard=false;
							for (auto token : definition->tokens)
							{
								if(token->name==symbol->GetName())
								{
									discard=token->discard;
									break;
								}
							}
							if(discard)
							{
								errors.Add(Ptr(new ParsingError(node, L"Cannot use discard token \""+node->name+L"\" as input.")));
								break;
							}
						}
					case ParsingSymbol::RuleDef:
						{
							ParsingSymbol* symbolType=symbol->GetDescriptorSymbol();
							manager->CacheSetSymbol(node, symbol);
							manager->CacheSetType(node, symbolType);
						}
						break;
					default:
						errors.Add(Ptr(new ParsingError(node, L"\""+node->name+L"\" is not a token definition or rule definition.")));
					}
				}

				void Visit(ParsingDefinitionTextGrammar* node)override
				{
					auto regex = regex_internal::EscapeTextForRegex(wtou32(node->text));
					for (vint i = 0; i < manager->GetGlobal()->GetSubSymbolCount(); i++)
					{
						ParsingSymbol* symbol = manager->GetGlobal()->GetSubSymbol(i);
						if (symbol->GetType() == ParsingSymbol::TokenDef)
						{
							auto normalizedRegex = regex_internal::NormalizeEscapedTextForRegex(wtou32(symbol->GetDescriptorString()));
							if (normalizedRegex == regex)
							{
								manager->CacheSetSymbol(node, symbol);
								manager->CacheSetType(node, manager->GetTokenType());
								return;
							}
						}
					}
					errors.Add(Ptr(new ParsingError(node, L"Cannot find a token whose definition is exactly \"" + u32tow(regex) + L"\".")));
				}

				void Visit(ParsingDefinitionSequenceGrammar* node)override
				{
					node->first->Accept(this);
					node->second->Accept(this);
				}

				void Visit(ParsingDefinitionAlternativeGrammar* node)override
				{
					node->first->Accept(this);
					node->second->Accept(this);
				}

				void Visit(ParsingDefinitionLoopGrammar* node)override
				{
					loopCount++;
					node->grammar->Accept(this);
					loopCount--;
				}

				void Visit(ParsingDefinitionOptionalGrammar* node)override
				{
					node->grammar->Accept(this);
				}

				void Visit(ParsingDefinitionCreateGrammar* node)override
				{
					if(loopCount>0)
					{
						errors.Add(Ptr(new ParsingError(node, L"Parsing tree node creation (the \"as\" operator) is not allowed inside loops.")));
					}
					if(ParsingSymbol* nodeType=FindType(node->type.Obj(), manager, 0, errors))
					{
						CheckCreationType(node, nodeType);
					}
					node->grammar->Accept(this);
				}

				void Visit(ParsingDefinitionAssignGrammar* node)override
				{
					if(!node->grammar.Cast<ParsingDefinitionPrimitiveGrammar>() && !node->grammar.Cast<ParsingDefinitionTextGrammar>())
					{
						errors.Add(Ptr(new ParsingError(node, L"Only parsing tree node returned from a rule or a token can be assigned to a class field.")));
					}
					node->grammar->Accept(this);
				}

				void Visit(ParsingDefinitionUseGrammar* node)override
				{
					if(loopCount>0)
					{
						errors.Add(Ptr(new ParsingError(node, L"Parsing tree node reusing (the \"!\" operator) is not allowed inside loops.")));
					}
					if(!node->grammar.Cast<ParsingDefinitionPrimitiveGrammar>())
					{
						errors.Add(Ptr(new ParsingError(node, L"Only parsing tree node returned from a rule can be reused.")));
					}
					else if(ParsingSymbol* symbol=manager->CacheGetSymbol(node->grammar.Obj()))
					{
						if(symbol->GetType()!=ParsingSymbol::RuleDef)
						{
							errors.Add(Ptr(new ParsingError(node, L"Only parsing tree node returned from a rule can be reused.")));
						}
					}
					if(ParsingSymbol* nodeType=manager->CacheGetType(node->grammar.Obj()))
					{
						CheckCreationType(node, nodeType);
					}
					node->grammar->Accept(this);
				}

				void Visit(ParsingDefinitionSetterGrammar* node)override
				{
					node->grammar->Accept(this);
				}
			};

			void ValidateRuleStructure(Ptr<definitions::ParsingDefinition> definition, Ptr<definitions::ParsingDefinitionRuleDefinition> rule, ParsingSymbolManager* manager, collections::List<Ptr<ParsingError>>& errors)
			{
				for (auto grammar : rule->grammars)
				{
					ValidateRuleStructureVisitor visitor(definition, manager, rule.Obj(), errors);
					grammar->Accept(&visitor);
				}
			}

/***********************************************************************
ResolveRuleSymbols
***********************************************************************/

			struct GrammarPathFragment
			{
				// primitive, text                            -> transition
				// loop, optional, create, use assign, setter -> epsilon
				GrammarPathFragment*						previousFragment;
				ParsingDefinitionGrammar*					grammar;
				bool										epsilon;
				ParsingSymbol*								createdType;

				GrammarPathFragment()
					:previousFragment(0)
					,grammar(0)
					,epsilon(false)
					,createdType(0)
				{
				}
			};

			struct GrammarPath
			{
				List<Ptr<GrammarPathFragment>>				fragments;
				ParsingSymbol*								pathType;

				GrammarPath()
					:pathType(0)
				{
				}

				WString ToString()
				{
					WString result;
					for (auto fragment : fragments)
					{
						if(!fragment->epsilon)
						{
							if(result!=L"") result+=L" ";
							result+=GrammarToString(fragment->grammar);
						}
					}
					return result;
				}
			};

			struct GrammarPathContainer
			{
				List<Ptr<GrammarPath>>						paths;
			};

			class EnumerateGrammarPathVisitor : public Object, public ParsingDefinitionGrammar::IVisitor
			{
			public:
				ParsingSymbolManager*						manager;
				ParsingDefinitionRuleDefinition*			rule;

				List<Ptr<GrammarPathFragment>>				createdFragments;
				List<GrammarPathFragment*>					currentFragmentEnds;

				EnumerateGrammarPathVisitor(ParsingSymbolManager* _manager, ParsingDefinitionRuleDefinition* _rule)
					:manager(_manager)
					,rule(_rule)
				{
				}

				EnumerateGrammarPathVisitor(const EnumerateGrammarPathVisitor& visitor)
					:manager(visitor.manager)
					,rule(visitor.rule)
				{
					CopyFrom(currentFragmentEnds, visitor.currentFragmentEnds);
				}

				void Join(const EnumerateGrammarPathVisitor& visitor)
				{
					CopyFrom(createdFragments, visitor.createdFragments, true);
					CopyFrom(currentFragmentEnds, visitor.currentFragmentEnds, true);
				}

				void AddFragment(ParsingDefinitionGrammar* node, bool epsilon, ParsingSymbol* createdType)
				{
					if(currentFragmentEnds.Count()==0)
					{
						auto fragment = Ptr(new GrammarPathFragment);
						fragment->grammar=node;
						fragment->epsilon=epsilon;
						fragment->createdType=createdType;
						createdFragments.Add(fragment);
						currentFragmentEnds.Add(fragment.Obj());
					}
					else for(vint i=0;i<currentFragmentEnds.Count();i++)
					{
						auto fragment = Ptr(new GrammarPathFragment);
						fragment->grammar=node;
						fragment->epsilon=epsilon;
						fragment->createdType=createdType;
						createdFragments.Add(fragment);
						fragment->previousFragment=currentFragmentEnds[i];
						currentFragmentEnds[i] = fragment.Obj();
					}
				}

				void BuildPath(List<Ptr<GrammarPath>>& paths)
				{
					for (auto fragment : currentFragmentEnds)
					{
						auto path = Ptr(new GrammarPath);
						paths.Add(path);

						GrammarPathFragment* current=fragment;
						while(current)
						{
							path->fragments.Insert(0, createdFragments[createdFragments.IndexOf(current)]);
							current=current->previousFragment;
						}
					}
				}

				void Visit(ParsingDefinitionPrimitiveGrammar* node)override
				{
					AddFragment(node, false, 0);
				}

				void Visit(ParsingDefinitionTextGrammar* node)override
				{
					AddFragment(node, false, 0);
				}

				void Visit(ParsingDefinitionSequenceGrammar* node)override
				{
					node->first->Accept(this);
					node->second->Accept(this);
				}

				void Visit(ParsingDefinitionAlternativeGrammar* node)override
				{
					EnumerateGrammarPathVisitor visitor(*this);
					node->second->Accept(&visitor);
					node->first->Accept(this);
					Join(visitor);
				}

				void Visit(ParsingDefinitionLoopGrammar* node)override
				{
					EnumerateGrammarPathVisitor visitor(*this);
					node->grammar->Accept(&visitor);
					AddFragment(node, true, 0);
					Join(visitor);
				}

				void Visit(ParsingDefinitionOptionalGrammar* node)override
				{
					EnumerateGrammarPathVisitor visitor(*this);
					node->grammar->Accept(&visitor);
					AddFragment(node, true, 0);
					Join(visitor);
				}

				void Visit(ParsingDefinitionCreateGrammar* node)override
				{
					node->grammar->Accept(this);
					AddFragment(node, true, manager->CacheGetType(node->type.Obj(), 0));
				}

				void Visit(ParsingDefinitionAssignGrammar* node)override
				{
					node->grammar->Accept(this);
					AddFragment(node, true, 0);
				}

				void Visit(ParsingDefinitionUseGrammar* node)override
				{
					node->grammar->Accept(this);
					AddFragment(node, true, manager->CacheGetSymbol(node->grammar.Obj())->GetDescriptorSymbol());
				}

				void Visit(ParsingDefinitionSetterGrammar* node)override
				{
					node->grammar->Accept(this);
					AddFragment(node, true, 0);
				}
			};

			class ResolveAssignerGrammarVisitor : public Object, public ParsingDefinitionGrammar::IVisitor
			{
			public:
				typedef Dictionary<ParsingDefinitionGrammar*, Ptr<GrammarPathContainer>>	GrammarPathMap;
				ParsingSymbolManager*			manager;
				List<Ptr<ParsingError>>&		errors;
				GrammarPathMap&					grammarPaths;

				ResolveAssignerGrammarVisitor(ParsingSymbolManager* _manager, List<Ptr<ParsingError>>& _errors, GrammarPathMap& _grammarPaths)
					:manager(_manager)
					,errors(_errors)
					,grammarPaths(_grammarPaths)
				{
				}

				ParsingSymbol* GetFieldFromCombined(ParsingDefinitionGrammar* node, const WString& fieldName)
				{
					Ptr<GrammarPathContainer> paths=grammarPaths[node];
					ParsingSymbol* pathType=paths->paths[0]->pathType;
					for(vint i=1;i<paths->paths.Count();i++)
					{
						pathType=pathType->SearchCommonBaseClass(paths->paths[i]->pathType);
						if(!pathType) break;
					}

					WString pathNames;
					WString typeNames;
					for(int i=0;i<paths->paths.Count();i++)
					{
						if(i>0)
						{
							pathNames+=L", ";
							typeNames+=L", ";
						}
						pathNames+=L"{"+paths->paths[i]->ToString()+L"}";
						typeNames+=L"\""+GetTypeFullName(paths->paths[i]->pathType)+L"\"";
					}

					if(pathType)
					{
						ParsingSymbol* field=pathType->SearchClassSubSymbol(fieldName);
						if(!field)
						{
							errors.Add(Ptr(new ParsingError(node, L"There are multiple grammar paths with different created types get through this operation for class field \""+fieldName+L"\", but the common base type \""+GetTypeFullName(pathType)+L"\" of these types doesn't contains the required class field. Types: "+typeNames+L"; Paths: "+pathNames+L".")));
						}
						else if(field->GetType()!=ParsingSymbol::ClassField)
						{
							errors.Add(Ptr(new ParsingError(node, L"There are multiple grammar paths with different created types get through this operation for class field \""+fieldName+L"\", and the common base type \""+GetTypeFullName(pathType)+L"\" of these types contains a symbol called \""+fieldName+L"\", but this is not a class field. Types: "+typeNames+L"; Paths: "+pathNames+L".")));
						}
						else
						{
							return field;
						}
					}
					else
					{
						errors.Add(Ptr(new ParsingError(node, L"There are multiple grammar paths with different created types get through this operation for class field \""+fieldName+L"\", but these types don't have a common base type. Types: "+typeNames+L"; Paths: "+pathNames+L".")));
					}
					return 0;
				}

				void Visit(ParsingDefinitionPrimitiveGrammar* node)override
				{
				}

				void Visit(ParsingDefinitionTextGrammar* node)override
				{
				}

				void Visit(ParsingDefinitionSequenceGrammar* node)override
				{
				}

				void Visit(ParsingDefinitionAlternativeGrammar* node)override
				{
				}

				void Visit(ParsingDefinitionLoopGrammar* node)override
				{
				}

				void Visit(ParsingDefinitionOptionalGrammar* node)override
				{
				}

				void Visit(ParsingDefinitionCreateGrammar* node)override
				{
				}

				void Visit(ParsingDefinitionAssignGrammar* node)override
				{
					if(ParsingSymbol* field=GetFieldFromCombined(node, node->memberName))
					{
						manager->CacheSetSymbol(node, field);
						manager->CacheSetType(node, field->GetDescriptorSymbol());

						ParsingSymbol* fieldType=field->GetDescriptorSymbol();
						ParsingSymbol* valueType=manager->CacheGetType(node->grammar.Obj());
						ParsingSymbol* targetFieldType=fieldType;
						if(targetFieldType->GetType()==ParsingSymbol::ArrayType)
						{
							targetFieldType=targetFieldType->GetDescriptorSymbol();
						}
						if(targetFieldType!=valueType && valueType->SearchCommonBaseClass(targetFieldType)!=targetFieldType)
						{
							errors.Add(Ptr(new ParsingError(node, L"Cannot assign value from grammar {"+GrammarToString(node->grammar.Obj())+L"} of type \""+GetTypeFullName(valueType)+L"\" to the field \""+node->memberName+L"\" of type \""+GetTypeFullName(fieldType)+L"\".")));
						}
					}
				}

				void Visit(ParsingDefinitionUseGrammar* node)override
				{
				}

				void Visit(ParsingDefinitionSetterGrammar* node)override
				{
					if(ParsingSymbol* field=GetFieldFromCombined(node, node->memberName))
					{
						manager->CacheSetSymbol(node, field);
						manager->CacheSetType(node, field->GetDescriptorSymbol());

						if(field->GetDescriptorSymbol()->GetType()!=ParsingSymbol::EnumType)
						{
							errors.Add(Ptr(new ParsingError(node, L"Setter operation (the \"with\" operator) can only specify the value of a class field of an enum type. But \""+GetTypeFullName(field->GetDescriptorSymbol())+L"\" is not a enum type.")));
						}
						else
						{
							ParsingSymbol* enumType=field->GetDescriptorSymbol();
							ParsingSymbol* enumItem=enumType->GetSubSymbolByName(node->value);
							if(!enumItem)
							{
								errors.Add(Ptr(new ParsingError(node, L"Type \""+GetTypeFullName(enumType)+L"\" from field \""+node->memberName+L"\" does not have an enum item called \""+node->value+L"\".")));
							}
							else if(enumItem->GetType()!=ParsingSymbol::EnumItem)
							{
								errors.Add(Ptr(new ParsingError(node, L"Type \""+GetTypeFullName(enumType)+L"\" from field \""+node->memberName+L"\" has a symbol called \""+node->value+L"\", but this is not an enum item.")));
							}
						}
					}
				}
			};

			void ResolveRuleSymbols(Ptr<definitions::ParsingDefinitionRuleDefinition> rule, ParsingSymbolManager* manager, collections::List<Ptr<ParsingError>>& errors)
			{
				ParsingSymbol* ruleType=manager->GetGlobal()->GetSubSymbolByName(rule->name)->GetDescriptorSymbol();

				for (auto grammar : rule->grammars)
				{
					List<Ptr<GrammarPath>> paths;
					{
						EnumerateGrammarPathVisitor visitor(manager, rule.Obj());
						grammar->Accept(&visitor);
						visitor.BuildPath(paths);
					}

					for (auto path : paths)
					{
						path->pathType=ruleType;
						vint createdTypeCount=0;
						vint transitionCount=0;
						for (auto fragment : path->fragments)
						{
							if(fragment->createdType)
							{
								createdTypeCount++;
								path->pathType=fragment->createdType;
							}
							if(!fragment->epsilon)
							{
								transitionCount++;
							}
						}

						if(createdTypeCount==0)
						{
							errors.Add(Ptr(new ParsingError(grammar.Obj(), L"No parsing tree node is created if the following path is chosen: \""+path->ToString()+L"\" in rule \""+rule->name+L"\".")));
						}
						else if(createdTypeCount>1)
						{
							errors.Add(Ptr(new ParsingError(grammar.Obj(), L"Multiple parsing tree nodes are created if the following path is chosen: \""+path->ToString()+L"\" in rule \""+rule->name+L"\".")));
						}
						if(transitionCount==0)
						{
							errors.Add(Ptr(new ParsingError(grammar.Obj(), L"Rule \""+rule->name+L"\" is not allowed to infer to an empty token sequence.")));
						}
					}

					ResolveAssignerGrammarVisitor::GrammarPathMap grammarPathMap;
					for (auto path : paths)
					{
						for (auto fragment : path->fragments)
						{
							ParsingDefinitionGrammar* grammar=fragment->grammar;
							Ptr<GrammarPathContainer> container;
							vint index=grammarPathMap.Keys().IndexOf(grammar);
							if(index==-1)
							{
								container = Ptr(new GrammarPathContainer);
								grammarPathMap.Add(grammar, container);
							}
							else
							{
								container=grammarPathMap.Values().Get(index);
							}
							container->paths.Add(path);
						}
					}

					ResolveAssignerGrammarVisitor visitor(manager, errors, grammarPathMap);
					for (auto grammar : grammarPathMap.Keys())
					{
						grammar->Accept(&visitor);
					}
				}
			}

/***********************************************************************
ResolveSymbols
***********************************************************************/

			void ResolveTypeSymbols(Ptr<ParsingDefinitionTypeDefinition> type, ParsingSymbolManager* manager, ParsingSymbol* scope, collections::List<Ptr<ParsingError>>& errors)
			{
				if(Ptr<ParsingDefinitionClassDefinition> node=type.Cast<ParsingDefinitionClassDefinition>())
				{
					if(node->ambiguousType)
					{
						ParsingSymbol* ambigiousType=FindType(node->ambiguousType.Obj(), manager, scope, errors);
						WString ambiguousTypeText=TypeToString(node->ambiguousType.Obj());
						if(!ambigiousType)
						{
							errors.Add(Ptr(new ParsingError(node.Obj(), L"Ambiguous type \""+ambiguousTypeText+L"\" for type \""+node->name+L"\" does not exist.")));
						}
						else if(ambigiousType->GetType()!=ParsingSymbol::ClassType)
						{
							errors.Add(Ptr(new ParsingError(node.Obj(), L"Ambiguous type \""+ambiguousTypeText+L"\" for type \""+node->name+L"\" is not a type.")));
						}
						else if(ambigiousType->GetDescriptorSymbol()!=manager->GetGlobal()->GetSubSymbolByName(node->name))
						{
							errors.Add(Ptr(new ParsingError(node.Obj(), L"Ambiguous type \""+ambiguousTypeText+L"\" for type \""+node->name+L"\" does not inherit from \""+node->name+L"\".")));
						}
						else
						{
							bool correct=false;
							if(ambigiousType->GetSubSymbolCount()==1)
							{
								ParsingSymbol* field=ambigiousType->GetSubSymbol(0);
								if(field->GetName()==L"items" && field->GetType()==ParsingSymbol::ClassField)
								{
									ParsingSymbol* fieldType=field->GetDescriptorSymbol();
									if(fieldType->GetType()==ParsingSymbol::ArrayType && fieldType->GetDescriptorSymbol()==ambigiousType->GetDescriptorSymbol())
									{
										correct=true;
									}
								}
							}
							if(!correct)
							{
								errors.Add(Ptr(new ParsingError(node.Obj(), L"Ambiguous type \""+ambiguousTypeText+L"\" for type \""+node->name+L"\" can only contains one field called \"item\" which should be an array of \""+node->name+L"\".")));
							}
						}
					}

					ParsingSymbol* classType=manager->CacheGetClassType(node.Obj());
					if(classType)
					{
						for (auto subType : node->subTypes)
						{
							ResolveTypeSymbols(subType, manager, classType, errors);
						}
					}
				}
			}

			void ResolveSymbols(Ptr<definitions::ParsingDefinition> definition, ParsingSymbolManager* manager, collections::List<Ptr<ParsingError>>& errors)
			{
				for (auto type : definition->types)
				{
					ResolveTypeSymbols(type, manager, manager->GetGlobal(), errors);
				}

				for (auto rule : definition->rules)
				{
					vint errorCount=errors.Count();
					ValidateRuleStructure(definition, rule, manager, errors);
					if(errors.Count()==errorCount)
					{
						ResolveRuleSymbols(rule, manager, errors);
					}
				}
			}

/***********************************************************************
ValidateDefinition
***********************************************************************/

			void ValidateDefinition(Ptr<definitions::ParsingDefinition> definition, ParsingSymbolManager* manager, collections::List<Ptr<ParsingError>>& errors)
			{
				PrepareSymbols(definition, manager, errors);
				if(errors.Count()>0) return;
				ResolveSymbols(definition, manager, errors);
			}
		}
	}
}

/***********************************************************************
.\PARSINGAUTOMATON.CPP
***********************************************************************/
/***********************************************************************
Author: Zihan Chen (vczh)
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	namespace parsing
	{
		using namespace collections;
		using namespace definitions;

		namespace analyzing
		{

/***********************************************************************
Action
***********************************************************************/

			Action::Action()
				:actionType(Create)
				,actionSource(0)
				,actionTarget(0)
				,creatorRule(0)
				,shiftReduceSource(0)
				,shiftReduceTarget(0)
			{
			}

			Action::~Action()
			{
			}

/***********************************************************************
Transition
***********************************************************************/

			Transition::Transition()
				:source(0)
				,target(0)
				,transitionType(Epsilon)
				,stackOperationType(None)
				,transitionSymbol(0)
			{
			}

			Transition::~Transition()
			{
			}

			bool Transition::IsEquivalent(Transition* t1, Transition* t2, bool careSourceAndTarget)
			{
				if(careSourceAndTarget)
				{
					if(t1->source!=t2->source || t1->target!=t2->target)
					{
						return false;
					}
				}
				if(	t1->actions.Count()!=t2->actions.Count() ||
					t1->transitionType!=t2->transitionType ||
					t1->transitionSymbol!=t2->transitionSymbol)
				{
					return false;
				}
				for(vint j=0;j<t1->actions.Count();j++)
				{
					Ptr<Action> a1=t1->actions[j];
					Ptr<Action> a2=t2->actions[j];
					if(	a1->actionType!=a2->actionType ||
						a1->actionSource!=a2->actionSource ||
						a1->actionTarget!=a2->actionTarget ||
						a1->shiftReduceSource!=a2->shiftReduceSource )
					{
						return false;
					}
				}
				return true;
			}

/***********************************************************************
State
***********************************************************************/

			State::State()
				:ownerRule(0)
				,ownerRuleSymbol(0)
				,grammarNode(0)
				,stateNode(0)
				,statePosition(BeforeNode)
				,endState(false)
			{
			}

			State::~State()
			{
			}

/***********************************************************************
RuleInfo
***********************************************************************/

			RuleInfo::RuleInfo()
				:rootRuleStartState(0)
				,rootRuleEndState(0)
				,startState(0)
				,stateNameCount(0)
			{
			}

			RuleInfo::~RuleInfo()
			{
			}

/***********************************************************************
Automaton
***********************************************************************/

			Automaton::Automaton(ParsingSymbolManager* _symbolManager)
				:symbolManager(_symbolManager)
			{
			}

			Automaton::~Automaton()
			{
			}

			void Automaton::AddRuleInfo(definitions::ParsingDefinitionRuleDefinition* rule, Ptr<RuleInfo> ruleInfo)
			{
				orderedRulesDefs.Add(rule);
				ruleInfos.Add(ruleInfo);
				ruleDefToInfoMap.Add(rule, ruleInfo);
			}

			State* Automaton::RuleStartState(definitions::ParsingDefinitionRuleDefinition* ownerRule)
			{
				auto state = Ptr(new State);
				states.Add(state);

				state->ownerRule=ownerRule;
				state->ownerRuleSymbol=symbolManager->GetGlobal()->GetSubSymbolByName(ownerRule->name);
				state->stateName=ownerRule->name+L".Start";
				state->stateExpression=L"@ <"+ownerRule->name+L">";
				return state.Obj();
			}

			State* Automaton::RootRuleStartState(definitions::ParsingDefinitionRuleDefinition* ownerRule)
			{
				auto state = Ptr(new State);
				states.Add(state);

				state->ownerRule=ownerRule;
				state->ownerRuleSymbol=symbolManager->GetGlobal()->GetSubSymbolByName(ownerRule->name);
				state->stateName=ownerRule->name+L".RootStart";
				state->stateExpression=L"@ $<"+ownerRule->name+L">";
				return state.Obj();
			}

			State* Automaton::RootRuleEndState(definitions::ParsingDefinitionRuleDefinition* ownerRule)
			{
				auto state = Ptr(new State);
				states.Add(state);

				state->ownerRule=ownerRule;
				state->ownerRuleSymbol=symbolManager->GetGlobal()->GetSubSymbolByName(ownerRule->name);
				state->stateName=ownerRule->name+L".RootEnd";
				state->stateExpression=L"$<"+ownerRule->name+L"> @";
				return state.Obj();
			}

			State* Automaton::StartState(definitions::ParsingDefinitionRuleDefinition* ownerRule, definitions::ParsingDefinitionGrammar* grammarNode, definitions::ParsingDefinitionGrammar* stateNode)
			{
				auto state = Ptr(new State);
				states.Add(state);

				state->ownerRule=ownerRule;
				state->ownerRuleSymbol=symbolManager->GetGlobal()->GetSubSymbolByName(ownerRule->name);
				state->grammarNode=grammarNode;
				state->stateNode=stateNode;
				state->statePosition=State::BeforeNode;
				state->stateName=ownerRule->name+L"."+itow(++ruleDefToInfoMap[ownerRule]->stateNameCount);
				stateNode=FindAppropriateGrammarState(grammarNode, stateNode, true);
				state->stateExpression=L"<"+ownerRule->name+L">: "+GrammarStateToString(grammarNode, stateNode, true);
				return state.Obj();
			}

			State* Automaton::EndState(definitions::ParsingDefinitionRuleDefinition* ownerRule, definitions::ParsingDefinitionGrammar* grammarNode, definitions::ParsingDefinitionGrammar* stateNode)
			{
				auto state = Ptr(new State);
				states.Add(state);

				state->ownerRule=ownerRule;
				state->ownerRuleSymbol=symbolManager->GetGlobal()->GetSubSymbolByName(ownerRule->name);
				state->grammarNode=grammarNode;
				state->stateNode=stateNode;
				state->statePosition=State::AfterNode;
				state->stateName=ownerRule->name+L"."+itow(++ruleDefToInfoMap[ownerRule]->stateNameCount);
				stateNode=FindAppropriateGrammarState(grammarNode, stateNode, false);
				state->stateExpression=L"<"+ownerRule->name+L">: "+GrammarStateToString(grammarNode, stateNode, false);
				return state.Obj();
			}

			State* Automaton::CopyState(State* oldState)
			{
				State* resultState=0;
				if(oldState->statePosition==State::BeforeNode)
				{
					resultState=StartState(oldState->ownerRule, oldState->grammarNode, oldState->stateNode);
				}
				else
				{
					resultState=EndState(oldState->ownerRule, oldState->grammarNode, oldState->stateNode);
				}
				resultState->endState=oldState->endState;
				return resultState;
			}

			Transition* Automaton::CreateTransition(State* start, State* end)
			{
				auto transition = Ptr(new Transition);
				transitions.Add(transition);

				start->transitions.Add(transition.Obj());
				end->inputs.Add(transition.Obj());

				transition->source=start;
				transition->target=end;
				return transition.Obj();
			}

			Transition* Automaton::TokenBegin(State* start, State* end)
			{
				Transition* transition=CreateTransition(start, end);
				transition->transitionType=Transition::TokenBegin;
				return transition;
			}

			Transition* Automaton::TokenFinish(State* start, State* end)
			{
				Transition* transition=CreateTransition(start, end);
				transition->transitionType=Transition::TokenFinish;
				return transition;
			}

			Transition* Automaton::NormalReduce(State* start, State* end)
			{
				Transition* transition=CreateTransition(start, end);
				transition->transitionType=Transition::NormalReduce;
				return transition;
			}

			Transition* Automaton::LeftRecursiveReduce(State* start, State* end)
			{
				Transition* transition=CreateTransition(start, end);
				transition->transitionType=Transition::LeftRecursiveReduce;
				return transition;
			}

			Transition* Automaton::Epsilon(State* start, State* end)
			{
				Transition* transition=CreateTransition(start, end);
				transition->transitionType=Transition::Epsilon;
				return transition;
			}

			Transition* Automaton::Symbol(State* start, State* end, ParsingSymbol* transitionSymbol)
			{
				Transition* transition=CreateTransition(start, end);
				transition->transitionType=Transition::Symbol;
				transition->transitionSymbol=transitionSymbol;
				return transition;
			}

			Transition* Automaton::CopyTransition(State* start, State* end, Transition* oldTransition)
			{
				Transition* transition=CreateTransition(start, end);
				transition->transitionType=oldTransition->transitionType;
				transition->stackOperationType=oldTransition->stackOperationType;
				transition->transitionSymbol=oldTransition->transitionSymbol;
				return transition;
			}

			void Automaton::DeleteTransition(Transition* transition)
			{
				transition->source->transitions.Remove(transition);
				transition->target->inputs.Remove(transition);
				transitions.Remove(transition);
			}

			void Automaton::DeleteState(State* state)
			{
				while(state->inputs.Count())
				{
					DeleteTransition(state->inputs[0]);
				}
				while(state->transitions.Count())
				{
					DeleteTransition(state->transitions[0]);
				}
				states.Remove(state);
			}
		}
	}
}

/***********************************************************************
.\PARSINGAUTOMATON_CLOSURE.CPP
***********************************************************************/
/***********************************************************************
Author: Zihan Chen (vczh)
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	namespace parsing
	{
		using namespace collections;
		using namespace definitions;

		namespace analyzing
		{

/***********************************************************************
CreateNondeterministicPDAFromEpsilonPDA::closure_searching
***********************************************************************/

			// closure function for searching <epsilon* symbol> reachable states
			ClosureItem::SearchResult EpsilonClosure(Transition* transition)
			{
				return
					transition->transitionType!=Transition::Epsilon?ClosureItem::Hit:
					//transition->target->endState?ClosureItem::Blocked:
					ClosureItem::Continue;
			}

			// closure searching function
			void SearchClosureInternal(ClosureItem::SearchResult(*closurePredicate)(Transition*), List<Transition*>& transitionPath, Transition* transition, State* state, List<ClosureItem>& closure)
			{
				for (auto singleTransitionPath : transitionPath)
				{
					if(singleTransitionPath->source==state && closurePredicate(singleTransitionPath)!=ClosureItem::Blocked)
					{
						auto path = Ptr(new List<Transition*>);
						CopyFrom(*path.Obj(), transitionPath);
						closure.Add(ClosureItem(state, path, true));
						return;
					}
				}

				ClosureItem::SearchResult result=transition?closurePredicate(transition):ClosureItem::Continue;
				switch(result)
				{
				case ClosureItem::Continue:
					{
						for (auto newTransition : state->transitions)
						{
							if(!transitionPath.Contains(newTransition))
							{
								transitionPath.Add(newTransition);
								SearchClosureInternal(closurePredicate, transitionPath, newTransition, newTransition->target, closure);
								transitionPath.RemoveAt(transitionPath.Count()-1);
							}
						}
					}
					break;
				case ClosureItem::Hit:
					{
						auto path = Ptr(new List<Transition*>);
						CopyFrom(*path.Obj(), transitionPath);
						closure.Add(ClosureItem(state, path, false));
					}
					break;
				default:;
				}
			}

			void SearchClosure(ClosureItem::SearchResult(*closurePredicate)(Transition*), State* startState, List<ClosureItem>& closure)
			{
				List<Transition*> transitionPath;
				SearchClosureInternal(closurePredicate, transitionPath, 0, startState, closure);
			}

			// map old state to new state and track all states that are not visited yet
			State* GetMappedState(Ptr<Automaton> newAutomaton, State* oldState, List<State*>& scanningStates, Dictionary<State*, State*>& oldNewStateMap)
			{
				State* newState=0;
				vint mapIndex=oldNewStateMap.Keys().IndexOf(oldState);
				if(mapIndex==-1)
				{
					newState=newAutomaton->CopyState(oldState);
					oldNewStateMap.Add(oldState, newState);
				}
				else
				{
					newState=oldNewStateMap.Values().Get(mapIndex);
				}
				if(!scanningStates.Contains(oldState))
				{
					scanningStates.Add(oldState);
				}
				return newState;
			}

/***********************************************************************
RemoveEpsilonTransitions
***********************************************************************/

			void RemoveEpsilonTransitions(collections::Dictionary<State*, State*>& oldNewStateMap, collections::List<State*>& scanningStates, Ptr<Automaton> automaton)
			{
				vint currentStateIndex=0;

				while(currentStateIndex<scanningStates.Count())
				{
					// map visiting state to new state
					State* currentOldState=scanningStates[currentStateIndex++];
					State* currentNewState=GetMappedState(automaton, currentOldState, scanningStates, oldNewStateMap);

					// search for epsilon closure
					List<ClosureItem> closure;
					SearchClosure(&EpsilonClosure, currentOldState, closure);
					for (auto closureItem : closure)
					{
						Transition* oldTransition=closureItem.transitions->Get(closureItem.transitions->Count()-1);
						if(!closureItem.cycle || oldTransition->transitionType!=Transition::Epsilon)
						{
							// if the oldTransition begins from an end state
							if(oldTransition->source->endState && closureItem.transitions->Count()>1)
							{
								// keep a epsilon transition that without the last "TokenFinish"
								State* newEndState=GetMappedState(automaton, oldTransition->source, scanningStates, oldNewStateMap);
								Transition* transition=automaton->Epsilon(currentNewState, newEndState);
								for (auto pathTransition : *closureItem.transitions.Obj())
								{
									if(pathTransition==oldTransition) break;
									CopyFrom(transition->actions, pathTransition->actions, true);
								}
							}
							else
							{
								// build compacted non-epsilon transition to the target state of the path
								State* newEndState=GetMappedState(automaton, oldTransition->target, scanningStates, oldNewStateMap);
								Transition* transition=automaton->CopyTransition(currentNewState, newEndState, oldTransition);
								for (auto pathTransition : *closureItem.transitions.Obj())
								{
									CopyFrom(transition->actions, pathTransition->actions, true);
								}
							}
						}
					}
				}
			}
		}
	}
}

/***********************************************************************
.\PARSINGAUTOMATON_EPDA.CPP
***********************************************************************/
/***********************************************************************
Author: Zihan Chen (vczh)
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	namespace parsing
	{
		using namespace collections;
		using namespace definitions;

		namespace analyzing
		{

/***********************************************************************
CreateEpsilonPDAVisitor
***********************************************************************/

			class CreateEpsilonPDAVisitor : public Object, public ParsingDefinitionGrammar::IVisitor
			{
			public:
				Ptr<Automaton>						automaton;
				ParsingDefinitionRuleDefinition*	rule;
				ParsingDefinitionGrammar*			ruleGrammar;
				State*								startState;
				State*								endState;
				Transition*							result;

				CreateEpsilonPDAVisitor(Ptr<Automaton> _automaton, ParsingDefinitionRuleDefinition* _rule, ParsingDefinitionGrammar* _ruleGrammar, State* _startState, State* _endState)
					:automaton(_automaton)
					,rule(_rule)
					,ruleGrammar(_ruleGrammar)
					,startState(_startState)
					,endState(_endState)
					,result(0)
				{
				}

				static Transition* Create(ParsingDefinitionGrammar* grammar, Ptr<Automaton> automaton, ParsingDefinitionRuleDefinition* rule, ParsingDefinitionGrammar* ruleGrammar, State* startState, State* endState)
				{
					CreateEpsilonPDAVisitor visitor(automaton, rule, ruleGrammar, startState, endState);
					grammar->Accept(&visitor);
					return visitor.result;
				}

				Transition* Create(ParsingDefinitionGrammar* grammar, State* startState, State* endState)
				{
					return Create(grammar, automaton, rule, ruleGrammar, startState, endState);
				}

				void Visit(ParsingDefinitionPrimitiveGrammar* node)override
				{
					result=automaton->Symbol(startState, endState, automaton->symbolManager->CacheGetSymbol(node));
				}

				void Visit(ParsingDefinitionTextGrammar* node)override
				{
					result=automaton->Symbol(startState, endState, automaton->symbolManager->CacheGetSymbol(node));
				}

				void Visit(ParsingDefinitionSequenceGrammar* node)override
				{
					State* middleState=automaton->EndState(startState->ownerRule, ruleGrammar, node->first.Obj());
					Create(node->first.Obj(), startState, middleState);
					Create(node->second.Obj(), middleState, endState);
				}

				void Visit(ParsingDefinitionAlternativeGrammar* node)override
				{
					Create(node->first.Obj(), startState, endState);
					Create(node->second.Obj(), startState, endState);
				}

				void Visit(ParsingDefinitionLoopGrammar* node)override
				{
					State* loopStart=automaton->StartState(startState->ownerRule, ruleGrammar, node->grammar.Obj());
					automaton->Epsilon(startState, loopStart);
					automaton->Epsilon(loopStart, endState);
					Create(node->grammar.Obj(), loopStart, loopStart);
				}

				void Visit(ParsingDefinitionOptionalGrammar* node)override
				{
					Create(node->grammar.Obj(), startState, endState);
					automaton->Epsilon(startState, endState);
				}

				void Visit(ParsingDefinitionCreateGrammar* node)override
				{
					State* middleState=automaton->EndState(startState->ownerRule, ruleGrammar, node->grammar.Obj());
					Create(node->grammar.Obj(), startState, middleState);
					Transition* transition=automaton->Epsilon(middleState, endState);

					auto action = Ptr(new Action);
					action->actionType=Action::Create;
					action->actionSource=automaton->symbolManager->CacheGetType(node->type.Obj(), 0);
					action->creatorRule=rule;
					transition->actions.Add(action);
				}

				void Visit(ParsingDefinitionAssignGrammar* node)override
				{
					Transition* transition=Create(node->grammar.Obj(), startState, endState);

					auto action = Ptr(new Action);
					action->actionType=Action::Assign;
					action->actionSource=automaton->symbolManager->CacheGetSymbol(node);
					action->creatorRule=rule;
					transition->actions.Add(action);
				}

				void Visit(ParsingDefinitionUseGrammar* node)override
				{
					Transition* transition=Create(node->grammar.Obj(), startState, endState);

					auto action = Ptr(new Action);
					action->actionType=Action::Using;
					action->creatorRule=rule;
					transition->actions.Add(action);
				}

				void Visit(ParsingDefinitionSetterGrammar* node)override
				{
					State* middleState=automaton->EndState(startState->ownerRule, ruleGrammar, node->grammar.Obj());
					Create(node->grammar.Obj(), startState, middleState);
					Transition* transition=automaton->Epsilon(middleState, endState);

					auto action = Ptr(new Action);
					action->actionType=Action::Setter;
					action->actionSource=automaton->symbolManager->CacheGetSymbol(node);
					action->actionTarget=action->actionSource->GetDescriptorSymbol()->GetSubSymbolByName(node->value);
					action->creatorRule=rule;
					transition->actions.Add(action);
				}
			};

/***********************************************************************
CreateRuleEpsilonPDA
***********************************************************************/

			void CreateRuleEpsilonPDA(Ptr<Automaton> automaton, Ptr<definitions::ParsingDefinitionRuleDefinition> rule, ParsingSymbolManager* manager)
			{
				auto ruleInfo = Ptr(new RuleInfo);
				automaton->AddRuleInfo(rule.Obj(), ruleInfo);

				ruleInfo->rootRuleStartState=automaton->RootRuleStartState(rule.Obj());
				ruleInfo->rootRuleEndState=automaton->RootRuleEndState(rule.Obj());
				ruleInfo->startState=automaton->RuleStartState(rule.Obj());
				automaton->TokenBegin(ruleInfo->rootRuleStartState, ruleInfo->startState);

				for (auto grammar : rule->grammars)
				{
					State* grammarStartState=automaton->StartState(rule.Obj(), grammar.Obj(), grammar.Obj());
					State* grammarEndState=automaton->EndState(rule.Obj(), grammar.Obj(), grammar.Obj());
					grammarEndState->stateName+=L".End";
					grammarEndState->endState=true;
					automaton->Epsilon(ruleInfo->startState, grammarStartState);
					automaton->TokenFinish(grammarEndState, ruleInfo->rootRuleEndState);
					ruleInfo->endStates.Add(grammarEndState);
					CreateEpsilonPDAVisitor::Create(grammar.Obj(), automaton, rule.Obj(), grammar.Obj(), grammarStartState, grammarEndState);
				}
			}

/***********************************************************************
CreateEpsilonPDA
***********************************************************************/

			Ptr<Automaton> CreateEpsilonPDA(Ptr<definitions::ParsingDefinition> definition, ParsingSymbolManager* manager)
			{
				auto automaton = Ptr(new Automaton(manager));
				for (auto rule : definition->rules)
				{
					CreateRuleEpsilonPDA(automaton, rule, manager);
				}
				return automaton;
			}
		}
	}
}

/***********************************************************************
.\PARSINGAUTOMATON_GENERATETABLE.CPP
***********************************************************************/
/***********************************************************************
Author: Zihan Chen (vczh)
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	namespace parsing
	{
		using namespace collections;
		using namespace definitions;
		using namespace tabling;

		namespace analyzing
		{

/***********************************************************************
GetTypeNameForCreateInstruction
***********************************************************************/

			WString GetTypeNameForCreateInstruction(ParsingSymbol* type)
			{
				ParsingSymbol* parent=type->GetParentSymbol();
				if(parent->GetType()==ParsingSymbol::ClassType)
				{
					return GetTypeNameForCreateInstruction(parent)+L"."+type->GetName();
				}
				else
				{
					return type->GetName();
				}
			}

/***********************************************************************
CreateLookAhead
***********************************************************************/

			void CopyStableLookAheads(List<Ptr<ParsingTable::LookAheadInfo>>& la, List<Ptr<ParsingTable::LookAheadInfo>>& sla, const List<Ptr<ParsingTable::LookAheadInfo>>& la2)
			{
				CopyFrom(sla, From(la)
					.Where([&](auto&& lai)
					{
						return From(la2).All([&](auto&& lai2)
						{
							return ParsingTable::LookAheadInfo::TestPrefix(lai, lai2)==ParsingTable::LookAheadInfo::NotPrefix;
						});
					}),
					true);
			}

			void RemoveStableLookAheads(List<Ptr<ParsingTable::LookAheadInfo>>& la, const List<Ptr<ParsingTable::LookAheadInfo>>& sla)
			{
				for(vint i=la.Count()-1;i>=0;i--)
				{
					if(sla.Contains(la[i].Obj()))
					{
						la.RemoveAt(i);
					}
				}
			}

			bool WalkLookAheads(Ptr<ParsingTable> table, List<Ptr<ParsingTable::LookAheadInfo>>& la, vint maxTokenCount)
			{
				vint count=la.Count();
				for(vint i=0;i<count;i++)
				{
					Ptr<ParsingTable::LookAheadInfo> lai=la[i];
					if(lai->tokens.Count()==maxTokenCount)
					{
						return false;
					}
					ParsingTable::LookAheadInfo::Walk(table, lai, lai->state, la);
				}
				return true;
			}

			void CompactLookAheads(Ptr<ParsingTable::TransitionItem> t, List<Ptr<ParsingTable::LookAheadInfo>>& sla)
			{
				CopyFrom(sla, t->lookAheads, true);
				CopyFrom(t->lookAheads, From(sla)
					.Where([&](auto&& lai)
					{
						return From(sla).All([&](auto&& lai2)
						{
							if(lai==lai2) return true;
							ParsingTable::LookAheadInfo::PrefixResult result=ParsingTable::LookAheadInfo::TestPrefix(lai, lai2);
							switch(result)
							{
							case ParsingTable::LookAheadInfo::Prefix:
								return false;
							case ParsingTable::LookAheadInfo::Equal:
								return sla.IndexOf(lai.Obj()) < sla.IndexOf(lai2.Obj());
							default:
								return true;
							}
						});
					}));
			}

			bool CreateLookAhead(Ptr<ParsingTable> table, Ptr<ParsingTable::TransitionItem> t1, Ptr<ParsingTable::TransitionItem> t2, vint maxTokenCount)
			{
				List<Ptr<ParsingTable::LookAheadInfo>> la1, la2, sla1, sla2;

				// calculate 1-token look aheads
				ParsingTable::LookAheadInfo::Walk(table, 0, t1->targetState, la1);
				ParsingTable::LookAheadInfo::Walk(table, 0, t2->targetState, la2);

				do
				{
					// pick up all stable look aheads and remove them from the look ahead list
					// stable look ahead means, when the look ahead is satisfied, then the transition is picked up with full confidence
					// non-stable look ahead means, when the look ahead is satisifed, it only increase confidence, needs further tokens for decision
					CopyStableLookAheads(la1, sla1, la2);
					CopyStableLookAheads(la2, sla2, la1);
					RemoveStableLookAheads(la1, sla1);
					RemoveStableLookAheads(la2, sla2);

					// check if there are non-stable look aheads in two transitions points to the same state
					// in such situation means that the two transition cannot always be determined using look aheads
					for (auto lai1 : la1)
					{
						for (auto lai2 : la2)
						{
							if (lai1->state == lai2->state)
							{
								if (ParsingTable::LookAheadInfo::TestPrefix(lai1, lai2) != ParsingTable::LookAheadInfo::NotPrefix)
								{
									return false;
								}
								if (ParsingTable::LookAheadInfo::TestPrefix(lai2, lai1) != ParsingTable::LookAheadInfo::NotPrefix)
								{
									return false;
								}
							}
						}
					}

					// use the non-stable look aheads to walk a token further
					if(!WalkLookAheads(table, la1, maxTokenCount) || !WalkLookAheads(table, la2, maxTokenCount))
					{
						return false;
					}
				}
				while(la1.Count()>0 || la2.Count()>0);

				CompactLookAheads(t1, sla1);
				CompactLookAheads(t2, sla2);
				return true;
			}

/***********************************************************************
CollectAttribute
***********************************************************************/

			void CollectType(ParsingSymbol* symbol, List<ParsingSymbol*>& types)
			{
				if(symbol->GetType()==ParsingSymbol::ClassType)
				{
					types.Add(symbol);
				}
				vint count=symbol->GetSubSymbolCount();
				for(vint i=0;i<count;i++)
				{
					CollectType(symbol->GetSubSymbol(i), types);
				}
			}

			void CollectAttributeInfo(Ptr<ParsingTable::AttributeInfoList> att, List<Ptr<definitions::ParsingDefinitionAttribute>>& atts)
			{
				for (auto datt : atts)
				{
					auto tatt = Ptr(new ParsingTable::AttributeInfo(datt->name));
					CopyFrom(tatt->arguments, datt->arguments);
					att->attributes.Add(tatt);
				}
			}

			Ptr<ParsingTable::AttributeInfoList> CreateAttributeInfo(List<Ptr<definitions::ParsingDefinitionAttribute>>& atts)
			{
				auto att = Ptr(new ParsingTable::AttributeInfoList);
				CollectAttributeInfo(att, atts);
				return att;
			}

/***********************************************************************
GenerateTable
***********************************************************************/

			vint LookAheadConflictPriority(vint tableTokenIndex)
			{
				switch (tableTokenIndex)
				{
				case ParsingTable::NormalReduce:
					return 0;
				case ParsingTable::LeftRecursiveReduce:
					return 1;
				default:
					return 2;
				}
			}

			void GenerateLookAhead(Ptr<ParsingTable> table, List<State*>& stateIds, vint state, vint token, Ptr<ParsingTable::TransitionItem> t1, Ptr<ParsingTable::TransitionItem> t2, bool enableAmbiguity, collections::List<Ptr<ParsingError>>& errors)
			{
				if(ParsingTable::TransitionItem::CheckOrder(t1, t2, ParsingTable::TransitionItem::UnknownOrder)==ParsingTable::TransitionItem::UnknownOrder)
				{
					if(enableAmbiguity || !CreateLookAhead(table, t1, t2, 16))
					{
						if (LookAheadConflictPriority(t1->token) != LookAheadConflictPriority(t2->token))
						{
							return;
						}
						WString stateName=itow(state)+L"["+table->GetStateInfo(state).stateName+L"]";
						WString tokenName=
							token==ParsingTable::TokenBegin?WString(L"$TokenBegin"):
							token==ParsingTable::TokenFinish?WString(L"$TokenFinish"):
							token==ParsingTable::NormalReduce?WString(L"$NormalReduce"):
							token==ParsingTable::LeftRecursiveReduce?WString(L"$LeftRecursiveReduce"):
							table->GetTokenInfo(token).name;
						switch (t1->token)
						{
						case ParsingTable::NormalReduce:
							errors.Add(Ptr(new ParsingError(stateIds[state]->ownerRule, L"Conflict happened with normal reduce in transition of \"" + tokenName + L"\" of state \"" + stateName + L"\".")));
							break;
						case ParsingTable::LeftRecursiveReduce:
							errors.Add(Ptr(new ParsingError(stateIds[state]->ownerRule, L"Conflict happened with left recursive reduce in transition of \"" + tokenName + L"\" of state \"" + stateName + L"\".")));
							break;
						default:
							errors.Add(Ptr(new ParsingError(stateIds[state]->ownerRule, L"Conflict happened in transition of \"" + tokenName + L"\" of state \"" + stateName + L"\".")));
							break;
						}
					}
				}
			}

			Ptr<tabling::ParsingTable> GenerateTableFromPDA(Ptr<definitions::ParsingDefinition> definition, ParsingSymbolManager* manager, Ptr<Automaton> jointPDA, bool enableAmbiguity, collections::List<Ptr<ParsingError>>& errors)
			{
				List<Ptr<ParsingTable::AttributeInfoList>> atts;

				/***********************************************************************
				find all class types
				***********************************************************************/
				List<ParsingSymbol*> types;
				Dictionary<WString, vint> typeAtts;
				Dictionary<Pair<WString, WString>, vint> treeFieldAtts;

				// stable class field order
				List<ParsingSymbol*> orderedChildTypeKeys;
				Dictionary<ParsingSymbol*, Ptr<List<ParsingSymbol*>>> childTypeValues;

				// find all class types
				CollectType(manager->GetGlobal(), types);
				for (auto type : types)
				{
					auto typeAtt = Ptr(new ParsingTable::AttributeInfoList);
					ParsingSymbol* parent = type;
					while (parent)
					{
						ParsingDefinitionClassDefinition* classDef = manager->CacheGetClassDefinition(parent);
						CollectAttributeInfo(typeAtt, classDef->attributes);

						Ptr<List<ParsingSymbol*>> children;
						vint index = childTypeValues.Keys().IndexOf(parent);
						if (index == -1)
						{
							children = Ptr(new List<ParsingSymbol*>);
							orderedChildTypeKeys.Add(parent);
							childTypeValues.Add(parent, children);
						}
						else
						{
							children = childTypeValues.Values().Get(index);
						}

						children->Add(type);
						parent = parent->GetDescriptorSymbol();
					}

					if (typeAtt->attributes.Count() > 0)
					{
						typeAtts.Add(GetTypeFullName(type), atts.Count());
						atts.Add(typeAtt);
					}
					else
					{
						typeAtts.Add(GetTypeFullName(type), -1);
					}
				}

				// find all class fields
				for (auto type : orderedChildTypeKeys)
				{
					List<ParsingSymbol*>& children = *childTypeValues[type].Obj();
					ParsingDefinitionClassDefinition* classDef = manager->CacheGetClassDefinition(type);
					List<vint> fieldAtts;

					for (auto [field, index] : indexed(classDef->members))
					{
						if (field->attributes.Count() > 0)
						{
							fieldAtts.Add(atts.Count());
							atts.Add(CreateAttributeInfo(field->attributes));
						}
						else
						{
							fieldAtts.Add(-1);
						}
					}

					for (auto child : children)
					{
						WString type = GetTypeFullName(child);
						for (auto [field, index] : indexed(classDef->members))
						{
							treeFieldAtts.Add(Pair<WString, WString>(type, field->name), fieldAtts[index]);
						}
					}
				}

				/***********************************************************************
				find all tokens
				***********************************************************************/
				vint tokenCount = 0;
				vint discardTokenCount = 0;
				Dictionary<ParsingSymbol*, vint> tokenIds;
				List<WString> discardTokens;

				Dictionary<WString, vint> tokenAtts;
				Dictionary<WString, vint> ruleAtts;

				for (auto token : definition->tokens)
				{
					if (token->attributes.Count() > 0)
					{
						tokenAtts.Add(token->name, atts.Count());
						atts.Add(CreateAttributeInfo(token->attributes));
					}
					else
					{
						tokenAtts.Add(token->name, -1);
					}

					if (token->discard)
					{
						discardTokens.Add(token->name);
						discardTokenCount++;
					}
					else
					{
						ParsingSymbol* tokenSymbol = jointPDA->symbolManager->GetGlobal()->GetSubSymbolByName(token->name);
						tokenIds.Add(tokenSymbol, tokenIds.Count() + ParsingTable::UserTokenStart);
						tokenCount++;
					}
				}

				/***********************************************************************
				find all rules
				***********************************************************************/
				for (auto rule : definition->rules)
				{
					if (rule->attributes.Count() > 0)
					{
						ruleAtts.Add(rule->name, atts.Count());
						atts.Add(CreateAttributeInfo(rule->attributes));
					}
					else
					{
						ruleAtts.Add(rule->name, -1);
					}
				}

				/***********************************************************************
				find all available states
				***********************************************************************/
				List<State*> stateIds;
				vint availableStateCount = 0;
				{
					vint currentState = 0;
					List<State*> scanningStates;
					for (auto ruleInfo : jointPDA->ruleInfos)
					{
						if (!scanningStates.Contains(ruleInfo->rootRuleStartState))
						{
							scanningStates.Add(ruleInfo->rootRuleStartState);
						}

						while (currentState < scanningStates.Count())
						{
							State* state = scanningStates[currentState++];
							stateIds.Add(state);

							for (auto transition : state->transitions)
							{
								if (!scanningStates.Contains(transition->target))
								{
									scanningStates.Add(transition->target);
								}
							}
						}
					}
					availableStateCount = scanningStates.Count();
				}

				// there will be some states that is used in shift and reduce but it is not a reachable state
				// so the state table will record all state
				for (auto state : jointPDA->states)
				{
					if (!stateIds.Contains(state.Obj()))
					{
						stateIds.Add(state.Obj());
					}
				}
				vint stateCount = stateIds.Count();

				auto table = Ptr(new ParsingTable(atts.Count(), typeAtts.Count(), treeFieldAtts.Count(), tokenCount, discardTokenCount, stateCount, definition->rules.Count()));

				/***********************************************************************
				fill attribute infos
				***********************************************************************/
				for (auto [att, index] : indexed(atts))
				{
					table->SetAttributeInfo(index, att);
				}

				/***********************************************************************
				fill tree type infos
				***********************************************************************/
				typedef Pair<WString, vint> TreeTypeAttsPair;
				for (auto [type, index] : indexed(typeAtts))
				{
					table->SetTreeTypeInfo(index, ParsingTable::TreeTypeInfo(type.key, type.value));
				}

				/***********************************************************************
				fill tree field infos
				***********************************************************************/
				typedef Pair<Pair<WString, WString>, vint> TreeFieldAttsPair;
				for (auto [field, index] : indexed(treeFieldAtts))
				{
					table->SetTreeFieldInfo(index, ParsingTable::TreeFieldInfo(field.key.key, field.key.value, field.value));
				}

				/***********************************************************************
				fill token infos
				***********************************************************************/
				for (auto symbol : tokenIds.Keys())
				{
					ParsingTable::TokenInfo info;
					info.name = symbol->GetName();
					info.regex = symbol->GetDescriptorString();
					info.attributeIndex = tokenAtts[info.name];

					vint id = tokenIds[symbol];
					table->SetTokenInfo(id, info);
				}

				for (auto [name, i] : indexed(discardTokens))
				{
					ParsingSymbol* symbol = jointPDA->symbolManager->GetGlobal()->GetSubSymbolByName(name);

					ParsingTable::TokenInfo info;
					info.name = symbol->GetName();
					info.regex = symbol->GetDescriptorString();
					info.attributeIndex = tokenAtts[info.name];
					table->SetDiscardTokenInfo(i, info);
				}

				/***********************************************************************
				fill rule infos
				***********************************************************************/
				for (auto [rule, i] : indexed(jointPDA->orderedRulesDefs))
				{
					Ptr<RuleInfo> pdaRuleInfo = jointPDA->ruleDefToInfoMap[rule];
					ParsingTable::RuleInfo info;
					info.name = rule->name;
					info.type = TypeToString(rule->type.Obj());
					info.rootStartState = stateIds.IndexOf(pdaRuleInfo->rootRuleStartState);
					info.attributeIndex = ruleAtts[info.name];

					if (Ptr<ParsingDefinitionPrimitiveType> classType = rule->type.Cast<ParsingDefinitionPrimitiveType>())
					{
						ParsingSymbol* ruleSymbol = manager->GetGlobal()->GetSubSymbolByName(rule->name);
						ParsingSymbol* ruleType = ruleSymbol->GetDescriptorSymbol();
						ParsingDefinitionClassDefinition* ruleTypeDef = manager->CacheGetClassDefinition(ruleType);
						if (ruleTypeDef && ruleTypeDef->ambiguousType)
						{
							ParsingSymbol* ambiguousType = manager->CacheGetType(ruleTypeDef->ambiguousType.Obj(), ruleType->GetParentSymbol());
							info.ambiguousType = GetTypeFullName(ambiguousType);
						}
					}
					table->SetRuleInfo(i, info);
				}

				/***********************************************************************
				fill state infos
				***********************************************************************/
				for (auto [state, i] : indexed(stateIds))
				{
					ParsingTable::StateInfo info;
					info.ruleName = state->ownerRule->name;
					info.stateName = state->stateName;
					info.stateExpression = state->stateExpression;
					table->SetStateInfo(i, info);
				}

				/***********************************************************************
				fill transition table
				***********************************************************************/
				for (auto [state, stateIndex] : indexed(stateIds))
				{
					// if this state is not necessary, stop building the table
					if (stateIndex >= availableStateCount) break;

					for (auto transition : state->transitions)
					{
						vint tokenIndex = -1;
						switch (transition->transitionType)
						{
						case Transition::TokenBegin:
							tokenIndex = ParsingTable::TokenBegin;
							break;
						case Transition::TokenFinish:
							tokenIndex = ParsingTable::TokenFinish;
							break;
						case Transition::NormalReduce:
							tokenIndex = ParsingTable::NormalReduce;
							break;
						case Transition::LeftRecursiveReduce:
							tokenIndex = ParsingTable::LeftRecursiveReduce;
							break;
						case Transition::Symbol:
							tokenIndex = tokenIds[transition->transitionSymbol];
							break;
						default:;
						}

						Ptr<ParsingTable::TransitionBag> bag = table->GetTransitionBag(stateIndex, tokenIndex);
						if (!bag)
						{
							bag = Ptr(new ParsingTable::TransitionBag);
							table->SetTransitionBag(stateIndex, tokenIndex, bag);
						}

						auto item = Ptr(new ParsingTable::TransitionItem);
						item->token = tokenIndex;
						item->targetState = stateIds.IndexOf(transition->target);
						bag->transitionItems.Add(item);

						for (auto action : transition->actions)
						{
							ParsingTable::Instruction ins;
							switch (action->actionType)
							{
							case Action::Create:
							{
								ins.instructionType = ParsingTable::Instruction::Create;
								ins.nameParameter = GetTypeNameForCreateInstruction(action->actionSource);
							}
							break;
							case Action::Using:
							{
								ins.instructionType = ParsingTable::Instruction::Using;
							}
							break;
							case Action::Assign:
							{
								if (action->actionSource->GetDescriptorSymbol()->GetType() == ParsingSymbol::ArrayType)
								{
									ins.instructionType = ParsingTable::Instruction::Item;
								}
								else
								{
									ins.instructionType = ParsingTable::Instruction::Assign;
								}
								ins.nameParameter = action->actionSource->GetName();
							}
							break;
							case Action::Setter:
							{
								ins.instructionType = ParsingTable::Instruction::Setter;
								ins.nameParameter = action->actionSource->GetName();
								ins.value = action->actionTarget->GetName();
							}
							break;
							case Action::Shift:
							{
								ins.instructionType = ParsingTable::Instruction::Shift;
								ins.stateParameter = stateIds.IndexOf(action->shiftReduceSource);
							}
							break;
							case Action::Reduce:
							{
								ins.instructionType = ParsingTable::Instruction::Reduce;
								ins.stateParameter = stateIds.IndexOf(action->shiftReduceSource);
								item->stackPattern.Add(ins.stateParameter);
							}
							break;
							case Action::LeftRecursiveReduce:
							{
								ins.instructionType = ParsingTable::Instruction::LeftRecursiveReduce;
								ins.stateParameter = stateIds.IndexOf(action->shiftReduceSource);
							}
							break;
							}
							ins.creatorRule = action->creatorRule->name;
							item->instructions.Add(ins);
						}
					}
				}

				/***********************************************************************
				check conflict and build look ahead table
				***********************************************************************/
				for (vint i = 0; i < table->GetStateCount(); i++)
				{
					for (vint j = 0; j < table->GetTokenCount(); j++)
					{
						Ptr<ParsingTable::TransitionBag> bag = table->GetTransitionBag(i, j);
						if (bag)
						{
							CopyFrom(
								bag->transitionItems,
								From(bag->transitionItems)
								.OrderBy([&](auto&& t1, auto&& t2)
								{
									// stable transition order
									vint i1 = bag->transitionItems.IndexOf(t1.Obj());
									vint i2 = bag->transitionItems.IndexOf(t2.Obj());
									auto defaultOrder =
										i1 < i2 ? ParsingTable::TransitionItem::CorrectOrder :
										i1 > i2 ? ParsingTable::TransitionItem::WrongOrder :
										ParsingTable::TransitionItem::SameOrder
										;
									return ParsingTable::TransitionItem::Compare(t1, t2, defaultOrder) <=> 0;
								}));

							// build look ahead inside a transition
							for (vint k1 = 0; k1 < bag->transitionItems.Count() - 1; k1++)
							{
								for (vint k2 = k1 + 1; k2 < bag->transitionItems.Count(); k2++)
								{
									Ptr<ParsingTable::TransitionItem> t1 = bag->transitionItems[k1];
									Ptr<ParsingTable::TransitionItem> t2 = bag->transitionItems[k2];
									GenerateLookAhead(table, stateIds, i, j, t1, t2, enableAmbiguity, errors);
								}
							}

							// build look ahead between this transition and reduce transitions
							for (vint t = ParsingTable::NormalReduce; t <= ParsingTable::LeftRecursiveReduce && t < j; t++)
							{
								if (Ptr<ParsingTable::TransitionBag> reduceBag = table->GetTransitionBag(i, t))
								{
									for (vint k1 = 0; k1 < reduceBag->transitionItems.Count(); k1++)
									{
										for (vint k2 = 0; k2 < bag->transitionItems.Count(); k2++)
										{
											Ptr<ParsingTable::TransitionItem> t1 = reduceBag->transitionItems[k1];
											Ptr<ParsingTable::TransitionItem> t2 = bag->transitionItems[k2];
											GenerateLookAhead(table, stateIds, i, j, t1, t2, enableAmbiguity, errors);
										}
									}
								}
							}
						}
					}
				}

				/***********************************************************************
				initialize table
				***********************************************************************/
				if (errors.Count() > 0)
				{
					table->SetAmbiguity(true);
				}
				table->Initialize();
				return table;
			}

			Ptr<tabling::ParsingTable> GenerateTable(Ptr<definitions::ParsingDefinition> definition, bool enableAmbiguity, collections::List<Ptr<ParsingError>>& errors)
			{
				errors.Clear();
				ParsingSymbolManager symbolManager;
				ValidateDefinition(definition, &symbolManager, errors);
				if(errors.Count()==0)
				{
					Ptr<Automaton> epsilonPDA=CreateEpsilonPDA(definition, &symbolManager);
					Ptr<Automaton> nondeterministicPDA=CreateNondeterministicPDAFromEpsilonPDA(epsilonPDA);
					Ptr<Automaton> jointPDA=CreateJointPDAFromNondeterministicPDA(nondeterministicPDA);
					CompactJointPDA(jointPDA);
					MarkLeftRecursiveInJointPDA(jointPDA, errors);
					if(errors.Count()==0)
					{
						Ptr<ParsingTable> table=GenerateTableFromPDA(definition, &symbolManager, jointPDA, enableAmbiguity, errors);
						if(enableAmbiguity || errors.Count()==0)
						{
							return table;
						}
					}
				}
				return 0;
			}
		}
	}
}

/***********************************************************************
.\PARSINGAUTOMATON_JPDA.CPP
***********************************************************************/
/***********************************************************************
Author: Zihan Chen (vczh)
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	namespace parsing
	{
		using namespace collections;
		using namespace definitions;

		namespace analyzing
		{
/***********************************************************************
CreateJointPDAFromNondeterministicPDA
***********************************************************************/

			Ptr<Automaton> CreateJointPDAFromNondeterministicPDA(Ptr<Automaton> nondeterministicPDA)
			{
				auto automaton = Ptr(new Automaton(nondeterministicPDA->symbolManager));

				// build rule info data
				Dictionary<WString, ParsingDefinitionRuleDefinition*> ruleMap;
				Dictionary<State*, State*> oldNewStateMap;
				for (auto rule : nondeterministicPDA->orderedRulesDefs)
				{
					// build new rule info
					auto ruleInfo = nondeterministicPDA->ruleDefToInfoMap[rule];
					auto newRuleInfo = Ptr(new RuleInfo);
					automaton->AddRuleInfo(rule, newRuleInfo);
					ruleMap.Add(rule->name, rule);

					newRuleInfo->rootRuleStartState=automaton->RootRuleStartState(rule);
					newRuleInfo->rootRuleEndState=automaton->RootRuleEndState(rule);
					newRuleInfo->startState=automaton->RuleStartState(rule);

					oldNewStateMap.Add(ruleInfo->rootRuleStartState, newRuleInfo->rootRuleStartState);
					oldNewStateMap.Add(ruleInfo->rootRuleEndState, newRuleInfo->rootRuleEndState);
					oldNewStateMap.Add(ruleInfo->startState, newRuleInfo->startState);

					newRuleInfo->rootRuleStartState->stateExpression=ruleInfo->rootRuleStartState->stateExpression;
					newRuleInfo->rootRuleEndState->stateExpression=ruleInfo->rootRuleEndState->stateExpression;
					newRuleInfo->startState->stateExpression=ruleInfo->startState->stateExpression;
				}

				for (auto oldState : nondeterministicPDA->states)
				{
					if((oldState->inputs.Count()>0 || oldState->transitions.Count()>0) && !oldNewStateMap.Keys().Contains(oldState.Obj()))
					{
						State* newState=automaton->CopyState(oldState.Obj());
						oldNewStateMap.Add(oldState.Obj(), newState);
						newState->stateExpression=oldState->stateExpression;
					}
				}

				// create transitions
				for (auto rule : nondeterministicPDA->orderedRulesDefs)
				{
					Ptr<RuleInfo> ruleInfo=nondeterministicPDA->ruleDefToInfoMap[rule];
					Ptr<RuleInfo> newRuleInfo=automaton->ruleDefToInfoMap[rule];

					// complete new rule info
					for (auto endState : ruleInfo->endStates)
					{
						newRuleInfo->endStates.Add(oldNewStateMap[endState]);
					}

					// create joint transitions according to old automaton
					List<State*> scanningStates;
					vint currentStateIndex=0;
					scanningStates.Add(ruleInfo->rootRuleStartState);

					while(currentStateIndex<scanningStates.Count())
					{
						State* currentOldState=scanningStates[currentStateIndex++];
						State* currentNewState=oldNewStateMap[currentOldState];
						for (auto oldTransition : currentOldState->transitions)
						{
							State* oldSource=oldTransition->source;
							State* oldTarget=oldTransition->target;
							State* newSource=oldNewStateMap[oldSource];
							State* newTarget=oldNewStateMap[oldTarget];

							if(!scanningStates.Contains(oldSource)) scanningStates.Add(oldSource);
							if(!scanningStates.Contains(oldTarget)) scanningStates.Add(oldTarget);

							if(oldTransition->transitionType==Transition::Symbol && oldTransition->transitionSymbol->GetType()==ParsingSymbol::RuleDef)
							{
								// if this is a rule transition, create
								// source -> ruleStart
								// ruleEnd[] -> target
								ParsingDefinitionRuleDefinition* rule=ruleMap[oldTransition->transitionSymbol->GetName()];
								Ptr<RuleInfo> oldRuleInfo=nondeterministicPDA->ruleDefToInfoMap[rule];

								{
									Transition* shiftTransition=automaton->Epsilon(newSource, oldNewStateMap[oldRuleInfo->startState]);
									auto action = Ptr(new Action);
									action->actionType=Action::Shift;
									action->shiftReduceSource=newSource;
									action->shiftReduceTarget=newTarget;
									action->creatorRule=shiftTransition->source->ownerRule;
									shiftTransition->actions.Add(action);
								}

								for (auto oldEndState : oldRuleInfo->endStates)
								{
									Transition* reduceTransition=automaton->NormalReduce(oldNewStateMap[oldEndState], newTarget);
									auto action = Ptr(new Action);
									action->actionType=Action::Reduce;
									action->shiftReduceSource=newSource;
									action->shiftReduceTarget=newTarget;
									action->creatorRule=reduceTransition->source->ownerRule;
									reduceTransition->actions.Add(action);
									CopyFrom(reduceTransition->actions, oldTransition->actions, true);
								}
							}
							else
							{
								// if not, just copy
								Transition* newTransition=automaton->CopyTransition(newSource, newTarget, oldTransition);
								CopyFrom(newTransition->actions, oldTransition->actions);
							}
						}
					}
				}
				return automaton;
			}

/***********************************************************************
CompactJointPDA
***********************************************************************/
			
			// closure function for searching shift-reduce-compact transition
			ClosureItem::SearchResult ShiftReduceCompactClosure(Transition* transition)
			{
				return
					transition->stackOperationType!=Transition::None?ClosureItem::Blocked:
					transition->transitionType!=Transition::Epsilon?ClosureItem::Hit:
					ClosureItem::Continue;
			}

			void CompactJointPDA(Ptr<Automaton> jointPDA)
			{
				for (auto state : jointPDA->states)
				{
					State* currentState=state.Obj();

					// search for epsilon closure
					List<ClosureItem> closure;
					SearchClosure(&ShiftReduceCompactClosure, currentState, closure);

					for (auto closureItem : closure)
					{
						Transition* lastTransition=closureItem.transitions->Get(closureItem.transitions->Count()-1);
						Transition::StackOperationType stackOperationType=Transition::None;
						Transition::TransitionType transitionType=lastTransition->transitionType;

						if(closureItem.cycle && lastTransition->transitionType==Transition::Epsilon)
						{
							bool containsShift=false;
							bool containsReduce=false;
							for (auto pathTransition : *closureItem.transitions.Obj())
							{
								for (auto action : pathTransition->actions)
								{
									if(action->actionType==Action::Shift) containsShift=true;
									if(action->actionType==Action::Reduce) containsReduce=true;
								}
							}
							if(containsShift && !containsReduce)
							{
								// a left recursive compacted shift transition is found
								// if the left recursive state is not the current state
								// that means this transition path fall into other left recursive state
								// e.g.
								//     Term = Factor | Term (here is a left recursion) * Factor
								//     Exp = Term (this rule symbol transition will fall into Term's left recursive state) ...
								// if such a case happened, this transition path will be simply discarded
								if(closureItem.state==currentState)
								{
									stackOperationType=Transition::LeftRecursive;
								}
							}
							else if(!containsShift && containsReduce)
							{
								// a right recursive compacted reduce transition is found
								// if this state will receive $TokenFinish, then the stack pattern number can be infinite
								// e.g. for right recursive expression "a b c" == "(a (b c))"
								// when trying to do a transition by $TokenFinish
								//     "a b" should reduce once
								//     "a b c" should reduce twice
								// because that a reduce is not considered a virtual token, so this is not going to be happened
							}
						}
						else if(closureItem.transitions->Count()>1)
						{
							// in joint PDA, only shift and reduce transitions are epsilon transition
							// if there are more than one transition in a path, then there should be shift or reduce transitions in the path
							stackOperationType=Transition::ShiftReduceCompacted;
						}

						if(stackOperationType!=Transition::None)
						{
							// build shift-reduce-compacted transition to the target state of the path
							Transition* transition=jointPDA->CopyTransition(currentState, lastTransition->target, lastTransition);
							transition->transitionType=transitionType;
							transition->stackOperationType=stackOperationType;

							// there will be <shift* token>, <reduce* token> or <reduce* shift* token>
							// but there will not be something like <reduce* shift* reduce* token>
							// so we can append stackPattern safely
							for (auto pathTransition : *closureItem.transitions.Obj())
							{
								CopyFrom(transition->actions, pathTransition->actions, true);
							}
						}
					}
				}

				// delete unnecessary transactions
				for(vint i=jointPDA->transitions.Count()-1;i>=0;i--)
				{
					Transition* transition=jointPDA->transitions[i].Obj();
					if(transition->stackOperationType==Transition::None && transition->transitionType==Transition::Epsilon)
					{
						jointPDA->DeleteTransition(transition);
					}
				}
			}

/***********************************************************************
MarkLeftRecursiveInJointPDA
***********************************************************************/

			void MarkLeftRecursiveInJointPDA(Ptr<Automaton> jointPDA, collections::List<Ptr<ParsingError>>& errors)
			{
				vint errorCount=errors.Count();
				// record all left recursive shifts and delete all left recursive epsilon transition
				SortedList<Pair<State*, State*>> leftRecursiveShifts;
				for (auto state : jointPDA->states)
				{
					for(vint i=state->transitions.Count()-1;i>=0;i--)
					{
						Transition* transition=state->transitions[i];
						if(transition->stackOperationType==Transition::LeftRecursive)
						{
							Ptr<Action> shiftAction;
							for (auto action : transition->actions)
							{
								if(action->actionType==Action::Shift)
								{
									if(shiftAction)
									{
										errors.Add(Ptr(new ParsingError(state->ownerRule, L"Indirect left recursive transition in rule \"" + state->ownerRule->name + L"\" is not allowed.")));
										goto FOUND_INDIRECT_LEFT_RECURSIVE_TRANSITION;
									}
									else
									{
										shiftAction=action;
									}
								}
							}
							if(shiftAction)
							{
								leftRecursiveShifts.Add(Pair<State*, State*>(shiftAction->shiftReduceSource, shiftAction->shiftReduceTarget));
							}
						FOUND_INDIRECT_LEFT_RECURSIVE_TRANSITION:
							jointPDA->DeleteTransition(transition);
						}
					}
				}
				if(errorCount!=errors.Count())
				{
					return;
				}

				// change all reduce actions whose (shiftReduceSource, shiftReduceTarget) is recorded in leftRecursiveShifts to left-recursive-reduce
				// when a reduce is converted to a left-recursive-reduce, the corresponding state in stackPattern should be removed
				// so this will keep count(Reduce) == count(stackPattern)
				for (auto state : jointPDA->states)
				{
					for (auto transition : state->transitions)
					{
						for(vint i=transition->actions.Count()-1;i>=0;i--)
						{
							Ptr<Action> action=transition->actions[i];
							if(action->actionType==Action::Reduce)
							{
								Pair<State*, State*> shift(action->shiftReduceSource, action->shiftReduceTarget);
								if(leftRecursiveShifts.Contains(shift))
								{
									// check if this is a normal reduce transition, and change it to a left recursive reduce transition.
									if (transition->transitionType == Transition::NormalReduce)
									{
										transition->transitionType = Transition::LeftRecursiveReduce;
										// need to create a new action because in the previous phrases, these action object are shared and treated as read only
										auto newAction = Ptr(new Action);
										newAction->actionType=Action::LeftRecursiveReduce;
										newAction->actionSource=action->actionSource;
										newAction->actionTarget=action->actionTarget;
										newAction->creatorRule=action->creatorRule;
										newAction->shiftReduceSource=action->shiftReduceSource;
										newAction->shiftReduceTarget=action->shiftReduceTarget;
										newAction->creatorRule=shift.key->ownerRule;
										transition->actions[i]=newAction;
									}
									else
									{
										errors.Add(Ptr(new ParsingError(state->ownerRule, L"Left recursive reduce action in non-normal-reduce found in rule \"" + state->ownerRule->name + L"\" is not allowed.")));
									}
								}
							}
						}
					}
				}

				// delete complicated transitions
				for (auto state : jointPDA->states)
				{
					while(true)
					{
						bool deleted=false;
						for (auto t1 : state->transitions)
						for (auto t2 : state->transitions)
						if(t1!=t2)
						{
							if(Transition::IsEquivalent(t1, t2, true))
							{
								jointPDA->DeleteTransition(t2);
								deleted=true;
								goto TRANSITION_DELETED;
							}
						}
					TRANSITION_DELETED:
						if(!deleted) break;
					}
				}
			}
		}
	}
}

/***********************************************************************
.\PARSINGAUTOMATON_MERGESTATES.CPP
***********************************************************************/
/***********************************************************************
Author: Zihan Chen (vczh)
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	namespace parsing
	{
		using namespace collections;
		using namespace definitions;

		namespace analyzing
		{

/***********************************************************************
DeleteUnnecessaryStates
***********************************************************************/

			void DeleteUnnecessaryStates(Ptr<Automaton> automaton, Ptr<RuleInfo> ruleInfo, List<State*>& newStates)
			{
				// delete all states that are not reachable to the end state
				while(true)
				{
					// find a non-end state without out transitions
					vint deleteCount=0;
					for(vint i=newStates.Count()-1;i>=0;i--)
					{
						State* newState=newStates[i];
						if(newState->transitions.Count()==0)
						{
							if(newState!=ruleInfo->rootRuleEndState && !newState->endState)
							{
								automaton->DeleteState(newState);
								newStates.RemoveAt(i);
							}
						}
					}
					if(deleteCount==0)
					{
						break;
					}
				}
			}

/***********************************************************************
IsMergableCandidate
***********************************************************************/

			bool IsMergableCandidate(State* state, Ptr<RuleInfo> ruleInfo)
			{
				if(state==ruleInfo->rootRuleStartState || state==ruleInfo->rootRuleEndState || state==ruleInfo->startState)
				{
					return false;
				}
				return true;
			}

/***********************************************************************
RearrangeState
***********************************************************************/

			std::strong_ordering CompareParsingSymbol(ParsingSymbol* s1, ParsingSymbol* s2)
			{
				if (s1 && s2)
				{
					std::strong_ordering
						result = s1->GetType() <=> s2->GetType(); if (result != 0) return result;
					result = s1->GetName() <=> s2->GetName(); if (result != 0) return result;
					return result;
				}
				else if (s1)
				{
					return std::strong_ordering::greater;
				}
				else if (s2)
				{
					return std::strong_ordering::less;
				}
				else
				{
					return std::strong_ordering::equal;
				}
			}

			std::strong_ordering CompareTransitionForRearranging(Transition* t1, Transition* t2)
			{
				std::strong_ordering
				result = t1->transitionType <=> t2->transitionType; if (result != 0) return result;
				result = CompareParsingSymbol(t1->transitionSymbol, t2->transitionSymbol); if (result != 0) return result;
				return result;
			}

			std::strong_ordering CompareActionForRearranging(Ptr<Action> a1, Ptr<Action> a2)
			{
				std::strong_ordering
				result = a1->actionType <=> a2->actionType; if (result != 0) return result;
				result = CompareParsingSymbol(a1->actionSource, a2->actionSource); if (result != 0) return result;
				result = CompareParsingSymbol(a1->actionTarget, a2->actionTarget); if (result != 0) return result;
				return result;
			}

#undef COMPARE_SYMBOL

			void RearrangeState(State* state, SortedList<State*>& stateContentSorted)
			{
				if(!stateContentSorted.Contains(state))
				{
					for (auto transition : state->transitions)
					{
						CopyFrom(transition->actions, From(transition->actions).OrderBy(&CompareActionForRearranging));
					}
					CopyFrom(state->transitions, From(state->transitions).OrderBy(&CompareTransitionForRearranging));
					stateContentSorted.Add(state);
				}
			}

/***********************************************************************
MoveActionsForMergingState
***********************************************************************/

			void MoveActionsForMergingState(Transition* transition)
			{
				// collect all movable actions
				List<Ptr<Action>> movableActions;
				for(vint i=transition->actions.Count()-1;i>=0;i--)
				{
					switch(transition->actions[i]->actionType)
					{
					// Using and Assign actions are not movable
					case Action::Using:
					case Action::Assign:
						break;
					default:
						movableActions.Add(transition->actions[i]);
						transition->actions.RemoveAt(i);
					}
				}

				// copy all movable actions
				for (auto t : transition->source->inputs)
				{
					CopyFrom(t->actions, movableActions, true);
				}
			}

/***********************************************************************
IsMergableBecause(Transitions|Input)
***********************************************************************/

			bool IsMergableBecauseTransitions(State* state1, State* state2)
			{
				if(state1->transitions.Count()!=state2->transitions.Count()) return false;
				if(state1->transitions.Count()==1 && state2->transitions.Count()==1)
				{
					Transition* t1=state1->transitions[0];
					Transition* t2=state2->transitions[0];
					if(CompareTransitionForRearranging(t1, t2)==0 && !Transition::IsEquivalent(t1, t2, false) && t1->target==t2->target)
					{
						MoveActionsForMergingState(t1);
						MoveActionsForMergingState(t2);
					}
				}
				for(vint i=0;i<state1->transitions.Count();i++)
				{
					Transition* t1=state1->transitions[i];
					Transition* t2=state2->transitions[i];
					if(!Transition::IsEquivalent(t1, t2, false) || t1->target!=t2->target)
					{
						return false;
					}
				}
				return true;
			}

			bool IsMergableBecauseInputs(State* state1, State* state2)
			{
				if(state1->inputs.Count()!=state2->inputs.Count()) return false;
				for(vint i=0;i<state1->inputs.Count();i++)
				{
					Transition* t1=state1->inputs[i];
					Transition* t2=state2->inputs[i];
					if(!Transition::IsEquivalent(t1, t2, false) || t1->source!=t2->source)
					{
						return false;
					}
				}
				return true;
			}

/***********************************************************************
MergeState2ToState1Because(Transitions|Input)
***********************************************************************/

			void MergeState2ToState1BecauseTransitions(Ptr<Automaton> automaton, State* state1, State* state2)
			{
				// modify state1's expression
				state1->stateExpression+=L"\r\n"+state2->stateExpression;

				// retarget state2's input to state1
				for(vint i=state2->inputs.Count()-1;i>=0;i--)
				{
					Transition* t2=state2->inputs[i];
					bool add=true;
					for (auto t1 : state1->inputs)
					{
						if(Transition::IsEquivalent(t1, t2, false) && t1->source==t2->source)
						{
							add=false;
							break;
						}
					}
					if(add)
					{
						state1->inputs.Add(t2);
						t2->target=state1;
						state2->inputs.RemoveAt(i);
					}
				}

				automaton->DeleteState(state2);
			}

			void MergeState2ToState1BecauseInputs(Ptr<Automaton> automaton, State* state1, State* state2)
			{
				// modify state1's expression
				state1->stateExpression+=L"\r\n"+state2->stateExpression;

				// retarget state2's input to state1
				for(vint i=state2->transitions.Count()-1;i>=0;i--)
				{
					Transition* t2=state2->transitions[i];
					bool add=true;
					for (auto t1 : state1->transitions)
					{
						if(Transition::IsEquivalent(t1, t2, false) && t1->target==t2->target)
						{
							add=false;
							break;
						}
					}
					if(add)
					{
						state1->transitions.Add(t2);
						t2->source=state1;
						state2->transitions.RemoveAt(i);
					}
				}

				automaton->DeleteState(state2);
			}

/***********************************************************************
MergeStates
***********************************************************************/

			void MergeStates(Ptr<Automaton> automaton, Ptr<RuleInfo> ruleInfo, List<State*>& newStates)
			{
				SortedList<State*> stateContentSorted;
				while(true)
				{
					for(vint i=0;i<newStates.Count();i++)
					{
						State* state1=newStates[i];
						if(IsMergableCandidate(state1, ruleInfo))
						{
							for(vint j=i+1;j<newStates.Count();j++)
							{
								State* state2=newStates[j];
								if(state1!=state2 && IsMergableCandidate(state2, ruleInfo))
								{
									RearrangeState(state1, stateContentSorted);
									RearrangeState(state2, stateContentSorted);
									if(IsMergableBecauseTransitions(state1, state2))
									{
										MergeState2ToState1BecauseTransitions(automaton, state1, state2);
										newStates.RemoveAt(j);
										goto MERGED_STATES_PAIR;
									}
									else if(IsMergableBecauseInputs(state1, state2))
									{
										MergeState2ToState1BecauseInputs(automaton, state1, state2);
										newStates.RemoveAt(j);
										goto MERGED_STATES_PAIR;
									}
								}
							}
						}
					}
					break;
				MERGED_STATES_PAIR:
					continue;
				}
			}
		}
	}
}

/***********************************************************************
.\PARSINGAUTOMATON_NPDA.CPP
***********************************************************************/
/***********************************************************************
Author: Zihan Chen (vczh)
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	namespace parsing
	{
		using namespace collections;
		using namespace definitions;

		namespace analyzing
		{

/***********************************************************************
CreateNondeterministicPDAFromEpsilonPDA
***********************************************************************/

			Ptr<Automaton> CreateNondeterministicPDAFromEpsilonPDA(Ptr<Automaton> epsilonPDA)
			{
				auto automaton = Ptr(new Automaton(epsilonPDA->symbolManager));
				for (auto rule : epsilonPDA->orderedRulesDefs)
				{
					// build new rule info
					auto ruleInfo = epsilonPDA->ruleDefToInfoMap[rule];
					auto newRuleInfo = Ptr(new RuleInfo);
					automaton->AddRuleInfo(rule, newRuleInfo);

					newRuleInfo->rootRuleStartState=automaton->RootRuleStartState(rule);
					newRuleInfo->rootRuleEndState=automaton->RootRuleEndState(rule);
					newRuleInfo->startState=automaton->RuleStartState(rule);

					// build state mapping and state visiting tracking
					Dictionary<State*, State*> oldNewStateMap;
					List<State*> scanningStates;
					vint currentStateIndex=0;
					oldNewStateMap.Add(ruleInfo->rootRuleStartState, newRuleInfo->rootRuleStartState);
					oldNewStateMap.Add(ruleInfo->rootRuleEndState, newRuleInfo->rootRuleEndState);
					oldNewStateMap.Add(ruleInfo->startState, newRuleInfo->startState);
					// begin with a root rule state state
					scanningStates.Add(ruleInfo->rootRuleStartState);
					// remove epsilon transitions
					RemoveEpsilonTransitions(oldNewStateMap, scanningStates, automaton);

					// stable state orders
					List<State*> newStates;
					CopyFrom(
						newStates,
						From(epsilonPDA->states)
							.Where([&](auto&& s) {return oldNewStateMap.Keys().Contains(s.Obj()); })
							.Select([&](auto&& s) { return oldNewStateMap[s.Obj()]; })
						);
					DeleteUnnecessaryStates(automaton, newRuleInfo, newStates);
					MergeStates(automaton, newRuleInfo, newStates);

					// there should be at east one and only one transition that is TokenBegin from rootRuleStartState
					// update the startState because the startState may be deleted
					newRuleInfo->startState=newRuleInfo->rootRuleStartState->transitions[0]->target;

					// record end states
					for (auto state : newStates)
					{
						if(state->endState)
						{
							newRuleInfo->endStates.Add(state);
						}
					}
				}
				return automaton;
			}
		}
	}
}

/***********************************************************************
.\PARSINGDEFINITIONS.CPP
***********************************************************************/
/***********************************************************************
Author: Zihan Chen (vczh)
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	using namespace collections;

	namespace parsing
	{
		namespace definitions
		{

/***********************************************************************
ParsingDefinitionType(Visitor)
***********************************************************************/

			void ParsingDefinitionPrimitiveType::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void ParsingDefinitionTokenType::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void ParsingDefinitionSubType::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void ParsingDefinitionArrayType::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

/***********************************************************************
ParsingDefinitionTypeDefinition(Visitor)
***********************************************************************/

			void ParsingDefinitionClassMemberDefinition::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void ParsingDefinitionClassDefinition::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void ParsingDefinitionEnumMemberDefinition::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void ParsingDefinitionEnumDefinition::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

/***********************************************************************
ParsingDefinitionGrammar(Visitor)
***********************************************************************/

			void ParsingDefinitionPrimitiveGrammar::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void ParsingDefinitionTextGrammar::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void ParsingDefinitionSequenceGrammar::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void ParsingDefinitionAlternativeGrammar::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void ParsingDefinitionLoopGrammar::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void ParsingDefinitionOptionalGrammar::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void ParsingDefinitionCreateGrammar::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void ParsingDefinitionAssignGrammar::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void ParsingDefinitionUseGrammar::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void ParsingDefinitionSetterGrammar::Accept(IVisitor* visitor)
			{
				visitor->Visit(this);
			}

/***********************************************************************
ParsingDefinitionTypeWriter
***********************************************************************/

			ParsingDefinitionAttributeWriter::ParsingDefinitionAttributeWriter(const WString& name)
			{
				attribute = Ptr(new ParsingDefinitionAttribute);
				attribute->name=name;
			}

			ParsingDefinitionAttributeWriter::ParsingDefinitionAttributeWriter(const ParsingDefinitionAttributeWriter& attributeWriter)
			{
				attribute=attributeWriter.attribute;
			}

			ParsingDefinitionAttributeWriter& ParsingDefinitionAttributeWriter::Argument(const WString& argument)
			{
				attribute->arguments.Add(argument);
				return *this;
			}

			Ptr<ParsingDefinitionAttribute> ParsingDefinitionAttributeWriter::Attribute()const
			{
				return attribute;
			}

			ParsingDefinitionAttributeWriter Attribute(const WString& name)
			{
				return ParsingDefinitionAttributeWriter(name);
			}

/***********************************************************************
ParsingDefinitionTypeWriter
***********************************************************************/

			ParsingDefinitionTypeWriter::ParsingDefinitionTypeWriter(Ptr<ParsingDefinitionType> internalType)
			{
				type=internalType;
			}

			ParsingDefinitionTypeWriter::ParsingDefinitionTypeWriter(const ParsingDefinitionTypeWriter& typeWriter)
			{
				type=typeWriter.type;
			}

			ParsingDefinitionTypeWriter::ParsingDefinitionTypeWriter(const WString& name)
			{
				auto primitiveType = Ptr(new ParsingDefinitionPrimitiveType);
				primitiveType->name=name;
				type=primitiveType;
			}

			ParsingDefinitionTypeWriter ParsingDefinitionTypeWriter::Sub(const WString& subTypeName)const
			{
				auto subType = Ptr(new ParsingDefinitionSubType);
				subType->parentType=type;
				subType->subTypeName=subTypeName;
				return ParsingDefinitionTypeWriter(subType);
			}

			ParsingDefinitionTypeWriter ParsingDefinitionTypeWriter::Array()const
			{
				auto arrayType = Ptr(new ParsingDefinitionArrayType);
				arrayType->elementType=type;
				return ParsingDefinitionTypeWriter(arrayType);
			}

			Ptr<ParsingDefinitionType> ParsingDefinitionTypeWriter::Type()const
			{
				return type;
			}

			ParsingDefinitionTypeWriter Type(const WString& name)
			{
				return ParsingDefinitionTypeWriter(name);
			}

			ParsingDefinitionTypeWriter TokenType()
			{
				auto type = Ptr(new ParsingDefinitionTokenType);
				return ParsingDefinitionTypeWriter(type);
			}

/***********************************************************************
ParsingDefinitionClassDefinitionWriter
***********************************************************************/

			ParsingDefinitionClassDefinitionWriter::ParsingDefinitionClassDefinitionWriter(const WString& name)
			{
				definition = Ptr(new ParsingDefinitionClassDefinition);
				definition->name=name;
				currentDefinition=definition;
			}

			ParsingDefinitionClassDefinitionWriter::ParsingDefinitionClassDefinitionWriter(const WString& name, const ParsingDefinitionTypeWriter& parentType)
			{
				definition = Ptr(new ParsingDefinitionClassDefinition);
				definition->name=name;
				definition->parentType=parentType.Type();
				currentDefinition=definition;
			}

			ParsingDefinitionClassDefinitionWriter& ParsingDefinitionClassDefinitionWriter::AmbiguousType(const ParsingDefinitionTypeWriter& ambiguousType)
			{
				definition->ambiguousType=ambiguousType.Type();
				return *this;
			}

			ParsingDefinitionClassDefinitionWriter& ParsingDefinitionClassDefinitionWriter::Member(const WString& name, const ParsingDefinitionTypeWriter& type, const WString& unescapingFunction)
			{
				auto member = Ptr(new ParsingDefinitionClassMemberDefinition);
				member->name=name;
				member->type=type.Type();
				member->unescapingFunction=unescapingFunction;
				definition->members.Add(member);
				currentDefinition=member;
				return *this;
			}

			ParsingDefinitionClassDefinitionWriter& ParsingDefinitionClassDefinitionWriter::SubType(const ParsingDefinitionTypeDefinitionWriter& type)
			{
				definition->subTypes.Add(type.Definition());
				return *this;
			}

			ParsingDefinitionClassDefinitionWriter& ParsingDefinitionClassDefinitionWriter::Attribute(const ParsingDefinitionAttributeWriter& attribute)
			{
				currentDefinition->attributes.Add(attribute.Attribute());
				return *this;
			}

			Ptr<ParsingDefinitionTypeDefinition> ParsingDefinitionClassDefinitionWriter::Definition()const
			{
				return definition;
			}

			ParsingDefinitionClassDefinitionWriter Class(const WString& name)
			{
				return ParsingDefinitionClassDefinitionWriter(name);
			}

			ParsingDefinitionClassDefinitionWriter Class(const WString& name, const ParsingDefinitionTypeWriter& parentType)
			{
				return ParsingDefinitionClassDefinitionWriter(name, parentType);
			}

/***********************************************************************
ParsingDefinitionEnumDefinitionWriter
***********************************************************************/

			ParsingDefinitionEnumDefinitionWriter::ParsingDefinitionEnumDefinitionWriter(const WString& name)
			{
				definition = Ptr(new ParsingDefinitionEnumDefinition);
				definition->name=name;
				currentDefinition=definition;
			}

			ParsingDefinitionEnumDefinitionWriter& ParsingDefinitionEnumDefinitionWriter::Member(const WString& name)
			{
				auto member = Ptr(new ParsingDefinitionEnumMemberDefinition);
				member->name=name;
				definition->members.Add(member);
				currentDefinition=member;
				return *this;
			}

			ParsingDefinitionEnumDefinitionWriter& ParsingDefinitionEnumDefinitionWriter::Attribute(const ParsingDefinitionAttributeWriter& attribute)
			{
				currentDefinition->attributes.Add(attribute.Attribute());
				return *this;
			}

			Ptr<ParsingDefinitionTypeDefinition> ParsingDefinitionEnumDefinitionWriter::Definition()const
			{
				return definition;
			}

			ParsingDefinitionEnumDefinitionWriter Enum(const WString& name)
			{
				return ParsingDefinitionEnumDefinitionWriter(name);
			}

/***********************************************************************
ParsingDefinitionGrammarWriter
***********************************************************************/

			ParsingDefinitionGrammarWriter::ParsingDefinitionGrammarWriter(Ptr<ParsingDefinitionGrammar> internalGrammar)
			{
				grammar=internalGrammar;
			}

			ParsingDefinitionGrammarWriter::ParsingDefinitionGrammarWriter(const ParsingDefinitionGrammarWriter& grammarWriter)
			{
				grammar=grammarWriter.grammar;
			}

			ParsingDefinitionGrammarWriter ParsingDefinitionGrammarWriter::operator+(const ParsingDefinitionGrammarWriter& next)const
			{
				auto sequence = Ptr(new ParsingDefinitionSequenceGrammar);
				sequence->first=grammar;
				sequence->second=next.Grammar();
				return ParsingDefinitionGrammarWriter(sequence);
			}

			ParsingDefinitionGrammarWriter ParsingDefinitionGrammarWriter::operator|(const ParsingDefinitionGrammarWriter& next)const
			{
				auto alternative = Ptr(new ParsingDefinitionAlternativeGrammar);
				alternative->first=grammar;
				alternative->second=next.Grammar();
				return ParsingDefinitionGrammarWriter(alternative);
			}

			ParsingDefinitionGrammarWriter ParsingDefinitionGrammarWriter::operator*()const
			{
				auto loop = Ptr(new ParsingDefinitionLoopGrammar);
				loop->grammar=grammar;
				return ParsingDefinitionGrammarWriter(loop);
			}

			ParsingDefinitionGrammarWriter ParsingDefinitionGrammarWriter::As(const ParsingDefinitionTypeWriter& type)const
			{
				auto create = Ptr(new ParsingDefinitionCreateGrammar);
				create->grammar=grammar;
				create->type=type.Type();
				return ParsingDefinitionGrammarWriter(create);
			}

			ParsingDefinitionGrammarWriter ParsingDefinitionGrammarWriter::operator[](const WString& memberName)const
			{
				auto assign = Ptr(new ParsingDefinitionAssignGrammar);
				assign->grammar=grammar;
				assign->memberName=memberName;
				return ParsingDefinitionGrammarWriter(assign);
			}

			ParsingDefinitionGrammarWriter ParsingDefinitionGrammarWriter::operator!()const
			{
				auto use = Ptr(new ParsingDefinitionUseGrammar);
				use->grammar=grammar;
				return ParsingDefinitionGrammarWriter(use);
			}

			ParsingDefinitionGrammarWriter ParsingDefinitionGrammarWriter::Set(const WString& memberName, const WString& value)const
			{
				auto setter = Ptr(new ParsingDefinitionSetterGrammar);
				setter->grammar=grammar;
				setter->memberName=memberName;
				setter->value=value;
				return ParsingDefinitionGrammarWriter(setter);
			}

			Ptr<ParsingDefinitionGrammar> ParsingDefinitionGrammarWriter::Grammar()const
			{
				return grammar;
			}

			ParsingDefinitionGrammarWriter Rule(const WString& name)
			{
				auto grammar = Ptr(new ParsingDefinitionPrimitiveGrammar);
				grammar->name=name;
				return ParsingDefinitionGrammarWriter(grammar);
			}

			ParsingDefinitionGrammarWriter Text(const WString& text)
			{
				auto grammar = Ptr(new ParsingDefinitionTextGrammar);
				grammar->text=text;
				return ParsingDefinitionGrammarWriter(grammar);
			}

			ParsingDefinitionGrammarWriter Opt(const ParsingDefinitionGrammarWriter& writer)
			{
				auto grammar = Ptr(new ParsingDefinitionOptionalGrammar);
				grammar->grammar=writer.Grammar();
				return ParsingDefinitionGrammarWriter(grammar);
			}

/***********************************************************************
ParsingDefinitionTokenDefinitionWriter
***********************************************************************/

			ParsingDefinitionTokenDefinitionWriter::ParsingDefinitionTokenDefinitionWriter(ParsingDefinitionWriter& _owner, Ptr<ParsingDefinitionTokenDefinition> _token)
				:owner(_owner)
				,token(_token)
			{
			}

			ParsingDefinitionTokenDefinitionWriter& ParsingDefinitionTokenDefinitionWriter::Attribute(const ParsingDefinitionAttributeWriter& attribute)
			{
				token->attributes.Add(attribute.Attribute());
				return *this;
			}

			ParsingDefinitionWriter& ParsingDefinitionTokenDefinitionWriter::EndToken()
			{
				return owner;
			}

/***********************************************************************
ParsingDefinitionRuleDefinitionWriter
***********************************************************************/

			ParsingDefinitionRuleDefinitionWriter::ParsingDefinitionRuleDefinitionWriter(ParsingDefinitionWriter& _owner, Ptr<ParsingDefinitionRuleDefinition> _rule)
				:owner(_owner)
				,rule(_rule)
			{
			}

			ParsingDefinitionRuleDefinitionWriter& ParsingDefinitionRuleDefinitionWriter::Imply(const ParsingDefinitionGrammarWriter& grammar)
			{
				rule->grammars.Add(grammar.Grammar());
				return *this;
			}

			ParsingDefinitionRuleDefinitionWriter& ParsingDefinitionRuleDefinitionWriter::Attribute(const ParsingDefinitionAttributeWriter& attribute)
			{
				rule->attributes.Add(attribute.Attribute());
				return *this;
			}

			ParsingDefinitionWriter& ParsingDefinitionRuleDefinitionWriter::EndRule()
			{
				return owner;
			}

/***********************************************************************
ParsingDefinitionWriter
***********************************************************************/

			ParsingDefinitionWriter::ParsingDefinitionWriter()
			{
				definition = Ptr(new ParsingDefinition);
			}

			ParsingDefinitionWriter& ParsingDefinitionWriter::Type(const ParsingDefinitionTypeDefinitionWriter& type)
			{
				definition->types.Add(type.Definition());
				return *this;
			}

			ParsingDefinitionWriter& ParsingDefinitionWriter::Token(const WString& name, const WString& regex)
			{
				return TokenAtt(name, regex).EndToken();
			}

			ParsingDefinitionTokenDefinitionWriter ParsingDefinitionWriter::TokenAtt(const WString& name, const WString& regex)
			{
				auto token = Ptr(new ParsingDefinitionTokenDefinition);
				token->name=name;
				token->regex=regex;
				token->discard=false;
				definition->tokens.Add(token);
				return ParsingDefinitionTokenDefinitionWriter(*this, token);
			}

			ParsingDefinitionWriter& ParsingDefinitionWriter::Discard(const WString& name, const WString& regex)
			{
				auto token = Ptr(new ParsingDefinitionTokenDefinition);
				token->name=name;
				token->regex=regex;
				token->discard=true;
				definition->tokens.Add(token);
				return *this;
			}

			ParsingDefinitionRuleDefinitionWriter ParsingDefinitionWriter::Rule(const WString& name, const ParsingDefinitionTypeWriter& type)
			{
				auto rule = Ptr(new ParsingDefinitionRuleDefinition);
				rule->name=name;
				rule->type=type.Type();
				definition->rules.Add(rule);
				return ParsingDefinitionRuleDefinitionWriter(*this, rule);
			}

			Ptr<ParsingDefinition> ParsingDefinitionWriter::Definition()const
			{
				return definition;
			}
		}
	}
}


/***********************************************************************
.\PARSINGDEFINITIONS_CREATEPARSERDEFINITION.CPP
***********************************************************************/
/***********************************************************************
Author: Zihan Chen (vczh)
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	namespace parsing
	{
		namespace definitions
		{
			using namespace collections;

/***********************************************************************
Bootstrap
***********************************************************************/

			Ptr<ParsingDefinition> CreateParserDefinition()
			{
				ParsingDefinitionWriter definitionWriter;

				definitionWriter
					.Type(
						Class(L"AttributeDef")
							.Member(L"name", TokenType())
								.Attribute(Attribute(L"Semantic").Argument(L"Attribute"))
							.Member(L"arguments", TokenType().Array())
						)
					.Type(
						Class(L"DefBase")
							.Member(L"attributes", Type(L"AttributeDef").Array())
						)
					//-------------------------------------
					.Type(
						Class(L"TypeObj")
						)

					.Type(
						Class(L"PrimitiveTypeObj", Type(L"TypeObj"))
							.Member(L"name", TokenType())
								.Attribute(Attribute(L"Semantic").Argument(L"Type"))
						)

					.Type(
						Class(L"TokenTypeObj", Type(L"TypeObj"))
						)

					.Type(
						Class(L"SubTypeObj", Type(L"TypeObj"))
							.Member(L"parentType", Type(L"TypeObj"))
							.Member(L"name", TokenType())
								.Attribute(Attribute(L"Semantic").Argument(L"Type"))
						)

					.Type(
						Class(L"ArrayTypeObj", Type(L"TypeObj"))
							.Member(L"elementType", Type(L"TypeObj"))
						)
					//-------------------------------------
					.Type(
						Class(L"TypeDef", Type(L"DefBase"))
							.Member(L"name", TokenType())
								.Attribute(Attribute(L"Color").Argument(L"Type"))
						)

					.Type(
						Class(L"ClassMemberDef", Type(L"DefBase"))
							.Member(L"type", Type(L"TypeObj"))
							.Member(L"name", TokenType())
							.Member(L"unescapingFunction", TokenType())
						)

					.Type(
						Class(L"ClassTypeDef", Type(L"TypeDef"))								
							.Member(L"ambiguousType", Type(L"TypeObj"))
							.Member(L"parentType", Type(L"TypeObj"))
							.Member(L"members", Type(L"ClassMemberDef").Array())
							.Member(L"subTypes", Type(L"TypeDef").Array())
						)

					.Type(
						Class(L"EnumMemberDef", Type(L"DefBase"))
							.Member(L"name", TokenType())
						)

					.Type(
						Class(L"EnumTypeDef", Type(L"TypeDef"))
							.Member(L"members", Type(L"EnumMemberDef").Array())
						)
					//-------------------------------------
					.Type(
						Class(L"GrammarDef")
						)

					.Type(
						Class(L"PrimitiveGrammarDef", Type(L"GrammarDef"))
							.Member(L"name", TokenType())
								.Attribute(Attribute(L"Semantic").Argument(L"Token").Argument(L"Rule"))
						)

					.Type(
						Class(L"TextGrammarDef", Type(L"GrammarDef"))
							.Member(L"text", TokenType())
								.Attribute(Attribute(L"Semantic").Argument(L"Literal"))
						)

					.Type(
						Class(L"SequenceGrammarDef", Type(L"GrammarDef"))
							.Member(L"first", Type(L"GrammarDef"))
							.Member(L"second", Type(L"GrammarDef"))
						)

					.Type(
						Class(L"AlternativeGrammarDef", Type(L"GrammarDef"))
							.Member(L"first", Type(L"GrammarDef"))
							.Member(L"second", Type(L"GrammarDef"))
						)

					.Type(
						Class(L"LoopGrammarDef", Type(L"GrammarDef"))
							.Member(L"grammar", Type(L"GrammarDef"))
						)

					.Type(
						Class(L"OptionalGrammarDef", Type(L"GrammarDef"))
							.Member(L"grammar", Type(L"GrammarDef"))
						)

					.Type(
						Class(L"CreateGrammarDef", Type(L"GrammarDef"))
							.Member(L"grammar", Type(L"GrammarDef"))
							.Member(L"type", Type(L"TypeObj"))
						)

					.Type(
						Class(L"AssignGrammarDef", Type(L"GrammarDef"))
							.Member(L"grammar", Type(L"GrammarDef"))
							.Member(L"memberName", TokenType())
								.Attribute(Attribute(L"Semantic").Argument(L"Field"))
						)

					.Type(
						Class(L"UseGrammarDef", Type(L"GrammarDef"))
							.Member(L"grammar", Type(L"GrammarDef"))
						)

					.Type(
						Class(L"SetterGrammarDef", Type(L"GrammarDef"))
							.Member(L"grammar", Type(L"GrammarDef"))
							.Member(L"memberName", TokenType())
								.Attribute(Attribute(L"Semantic").Argument(L"Field"))
							.Member(L"value", TokenType())
								.Attribute(Attribute(L"Semantic").Argument(L"EnumValue"))
						)
					//-------------------------------------
					.Type(
						Class(L"TokenDef", Type(L"DefBase"))
							.SubType(
								Enum(L"DiscardOption")
									.Member(L"DiscardToken")
									.Member(L"KeepToken")
								)
							.Member(L"name", TokenType())
								.Attribute(Attribute(L"Color").Argument(L"Token"))
							.Member(L"regex", TokenType())
							.Member(L"discard", Type(L"DiscardOption"))
						)

					.Type(
						Class(L"RuleDef", Type(L"DefBase"))
							.Member(L"name", TokenType())
								.Attribute(Attribute(L"Color").Argument(L"Rule"))
							.Member(L"type", Type(L"TypeObj"))
							.Member(L"grammars", Type(L"GrammarDef").Array())
						)

					.Type(
						Class(L"ParserDef")
							.Member(L"definitions", Type(L"DefBase").Array())
						)
					//-------------------------------------
					.TokenAtt(L"CLASS",		L"class")
						.Attribute(Attribute(L"Color").Argument(L"Keyword"))
						.Attribute(Attribute(L"Candidate"))
						.EndToken()
					.TokenAtt(L"AMBIGUOUS",	L"ambiguous")
						.Attribute(Attribute(L"Color").Argument(L"Keyword"))
						.Attribute(Attribute(L"Candidate"))
						.EndToken()
					.TokenAtt(L"ENUM",			L"enum")
						.Attribute(Attribute(L"Color").Argument(L"Keyword"))
						.Attribute(Attribute(L"Candidate"))
						.EndToken()
					.TokenAtt(L"TOKEN",		L"token")
						.Attribute(Attribute(L"Color").Argument(L"Keyword"))
						.Attribute(Attribute(L"Candidate"))
						.EndToken()
					.TokenAtt(L"DISCARDTOKEN",	L"discardtoken")
						.Attribute(Attribute(L"Color").Argument(L"Keyword"))
						.Attribute(Attribute(L"Candidate"))
						.EndToken()
					.TokenAtt(L"RULE",			L"rule")
						.Attribute(Attribute(L"Color").Argument(L"Keyword"))
						.Attribute(Attribute(L"Candidate"))
						.EndToken()
					.TokenAtt(L"AS",			L"as")
						.Attribute(Attribute(L"Color").Argument(L"Keyword"))
						.Attribute(Attribute(L"Candidate"))
						.EndToken()
					.TokenAtt(L"WITH",			L"with")
						.Attribute(Attribute(L"Color").Argument(L"Keyword"))
						.Attribute(Attribute(L"Candidate"))
						.EndToken()

					.Token(L"OPEN",			L"/{")
					.Token(L"CLOSE",		L"/}")
					.Token(L"SEMICOLON",	L";")
					.Token(L"COLON",		L":")
					.Token(L"COMMA",		L",")
					.Token(L"DOT",			L".")
					.Token(L"ASSIGN",		L"/=")
					.Token(L"USING",		L"/!")
					.Token(L"OR",			L"/|")
					.Token(L"OPTOPEN",		L"/[")
					.Token(L"OPTCLOSE",		L"/]")
					.Token(L"PREOPEN",		L"/(")
					.Token(L"PRECLOSE",		L"/)")
					.TokenAtt(L"ATT",		L"@")
						.Attribute(Attribute(L"Color").Argument(L"Attribute"))
						.EndToken()

					.TokenAtt(L"NAME",		L"[a-zA-Z_]/w*")
						.Attribute(Attribute(L"Color").Argument(L"Default"))
						.Attribute(Attribute(L"ContextColor"))
						.Attribute(Attribute(L"AutoComplete"))
						.EndToken()
					.TokenAtt(L"STRING",	L"\"([^\"]|\"\")*\"")
						.Attribute(Attribute(L"Color").Argument(L"String"))
						.Attribute(Attribute(L"AutoComplete"))
						.EndToken()
					.Discard(L"SPACE",		L"/s+")
					.Discard(L"COMMENT",	L"////[^\\r\\n]*")
					//-------------------------------------
					.Rule(L"Attribute", Type(L"AttributeDef"))
						.Imply(
							(Text(L"@") + Rule(L"NAME")[L"name"] + Text(L"(") + Opt(Rule(L"STRING")[L"arguments"] + *(Text(L",") + Rule(L"STRING")[L"arguments"])) + Text(L")"))
								.As(Type(L"AttributeDef"))
							)
						.EndRule()
					//-------------------------------------
					.Rule(L"Type", Type(L"TypeObj"))
						.Imply(
							(Rule(L"NAME")[L"name"])
								.As(Type(L"PrimitiveTypeObj"))
							)
						.Imply(
							Text(L"token")
								.As(Type(L"TokenTypeObj"))
							)
						.Imply(
							(Rule(L"Type")[L"parentType"] + Text(L".") + Rule(L"NAME")[L"name"])
								.As(Type(L"SubTypeObj"))
							)
						.Imply(
							(Rule(L"Type")[L"elementType"] + Text(L"[") + Text(L"]"))
								.As(Type(L"ArrayTypeObj"))
							)
						.EndRule()
					//-------------------------------------
					.Rule(L"EnumMember", Type(L"EnumMemberDef"))
						.Imply(
							(
								Rule(L"NAME")[L"name"]
								+ Opt(Rule(L"Attribute")[L"attributes"] + *(Text(L",") + Rule(L"Attribute")[L"attributes"]))
								+ Text(L",")
								)
								.As(Type(L"EnumMemberDef"))
							)
						.EndRule()
					.Rule(L"Enum", Type(L"EnumTypeDef"))
						.Imply(
							(
								Text(L"enum") + Rule(L"NAME")[L"name"]
								+ Opt(Rule(L"Attribute")[L"attributes"] + *(Text(L",") + Rule(L"Attribute")[L"attributes"]))
								+ Text(L"{")
								+ *(Rule(L"EnumMember")[L"members"])
								+ Text(L"}")
								)
								.As(Type(L"EnumTypeDef"))
							)
						.EndRule()
					.Rule(L"ClassMember", Type(L"ClassMemberDef"))
						.Imply(
							(
								Rule(L"Type")[L"type"] + Rule(L"NAME")[L"name"]
								+ Opt(Text(L"(") + Rule(L"NAME")[L"unescapingFunction"] + Text(L")"))
								+ Opt(Rule(L"Attribute")[L"attributes"] + *(Text(L",") + Rule(L"Attribute")[L"attributes"]))
								+ Text(L";")
								)
								.As(Type(L"ClassMemberDef"))
							)
						.EndRule()
					.Rule(L"Class", Type(L"ClassTypeDef"))
						.Imply(
							(
								Text(L"class") + Rule(L"NAME")[L"name"]
								+ Opt(Text(L"ambiguous") + Text(L"(") + Rule(L"Type")[L"ambiguousType"] + Text(L")"))
								+ Opt(Text(L":") + Rule(L"Type")[L"parentType"])
								+ Opt(Rule(L"Attribute")[L"attributes"] + *(Text(L",") + Rule(L"Attribute")[L"attributes"]))
								+ Text(L"{")
								+ *(Rule(L"ClassMember")[L"members"] | Rule(L"TypeDecl")[L"subTypes"])
								+ Text(L"}")
								)
								.As(Type(L"ClassTypeDef"))
							)
						.EndRule()
					.Rule(L"TypeDecl", Type(L"TypeDef"))
						.Imply(!Rule(L"Enum") | !Rule(L"Class"))
						.EndRule()
					//------------------------------------
					.Rule(L"PrimitiveGrammar", Type(L"GrammarDef"))
						.Imply(
							(Rule(L"NAME")[L"name"])
								.As(Type(L"PrimitiveGrammarDef"))
							)
						.Imply(
							(Rule(L"STRING")[L"text"])
								.As(Type(L"TextGrammarDef"))
							)
						.Imply(
							(Rule(L"PrimitiveGrammar")[L"grammar"] + Text(L":") + Rule(L"NAME")[L"memberName"])
								.As(Type(L"AssignGrammarDef"))
							)
						.Imply(
							(Text(L"!") + Rule(L"PrimitiveGrammar")[L"grammar"])
								.As(Type(L"UseGrammarDef"))
							)
						.Imply(
							(Text(L"[") + Rule(L"Grammar")[L"grammar"] + Text(L"]"))
								.As(Type(L"OptionalGrammarDef"))
							)
						.Imply(
							(Text(L"{") + Rule(L"Grammar")[L"grammar"] + Text(L"}"))
								.As(Type(L"LoopGrammarDef"))
							)
						.Imply(
							(Text(L"(") + !Rule(L"Grammar") + Text(L")"))
							)
						.EndRule()

					.Rule(L"SequenceGrammar", Type(L"GrammarDef"))
						.Imply(
							!Rule(L"PrimitiveGrammar")
							)
						.Imply(
							(Rule(L"SequenceGrammar")[L"first"] + Rule(L"PrimitiveGrammar")[L"second"])
								.As(Type(L"SequenceGrammarDef"))
							)
						.EndRule()

					.Rule(L"AlternativeGrammar", Type(L"GrammarDef"))
						.Imply(
							!Rule(L"SequenceGrammar")
							)
						.Imply(
							(Rule(L"AlternativeGrammar")[L"first"] + Text(L"|") + Rule(L"SequenceGrammar")[L"second"])
								.As(Type(L"AlternativeGrammarDef"))
							)
						.EndRule()

					.Rule(L"Grammar", Type(L"GrammarDef"))
						.Imply(
							!Rule(L"AlternativeGrammar")
							)
						.Imply(
							(Rule(L"Grammar")[L"grammar"] + Text(L"as") + Rule(L"Type")[L"type"])
								.As(Type(L"CreateGrammarDef"))
							)
						.Imply(
							(Rule(L"Grammar")[L"grammar"] + Text(L"with") + Text(L"{") + Rule(L"NAME")[L"memberName"] + Text(L"=") + Rule(L"STRING")[L"value"] + Text(L"}"))
								.As(Type(L"SetterGrammarDef"))
							)
						.EndRule()
					//------------------------------------
					.Rule(L"TokenDecl", Type(L"TokenDef"))
						.Imply(
							(
								Text(L"token") + Rule(L"NAME")[L"name"]
								+ Text(L"=") + Rule(L"STRING")[L"regex"]
								+ Opt(Rule(L"Attribute")[L"attributes"] + *(Text(L",") + Rule(L"Attribute")[L"attributes"]))
								+ Text(L";")
								)
								.As(Type(L"TokenDef"))
								.Set(L"discard", L"KeepToken")
							)
						.Imply(
							(Text(L"discardtoken") + Rule(L"NAME")[L"name"] + Text(L"=") + Rule(L"STRING")[L"regex"] + Text(L";"))
								.As(Type(L"TokenDef"))
								.Set(L"discard", L"DiscardToken")
							)
						.EndRule()

					.Rule(L"RuleDecl", Type(L"RuleDef"))
						.Imply(
							(
								Text(L"rule") + Rule(L"Type")[L"type"] + Rule(L"NAME")[L"name"]
								+ Opt(Rule(L"Attribute")[L"attributes"] + *(Text(L",") + Rule(L"Attribute")[L"attributes"]))
								+ *(Text(L"=") + Rule(L"Grammar")[L"grammars"])
								+ Text(L";")
								)
								.As(Type(L"RuleDef"))
							)
						.EndRule()
					//------------------------------------
					.Rule(L"ParserDecl", Type(L"ParserDef"))
						.Imply(
							(
								*(
									Rule(L"TypeDecl")[L"definitions"] |
									Rule(L"TokenDecl")[L"definitions"] |
									Rule(L"RuleDecl")[L"definitions"]
									)
								+(
									Rule(L"TypeDecl")[L"definitions"] |
									Rule(L"TokenDecl")[L"definitions"] |
									Rule(L"RuleDecl")[L"definitions"]
									)
								)
								.As(Type(L"ParserDef"))
							)
						.EndRule()
					;

				return definitionWriter.Definition();
			}

			WString DeserializeString(const WString& value)
			{
				if(value.Length()>=2 && value[0]==L'"' && value[value.Length()-1]==L'"')
				{
					Array<wchar_t> chars(value.Length());
					memset(&chars[0], 0, chars.Count()*sizeof(wchar_t));
					const wchar_t* reading=value.Buffer()+1;
					wchar_t* writing=&chars[0];
					while(*reading)
					{
						if(*reading!=L'"')
						{
							*writing++=*reading++;
						}
						else if(reading[1]!=L'"')
						{
							break;
						}
						else
						{
							*writing++=L'"';
							reading+=2;
						}
					}
					return &chars[0];
				}
				return L"";
			}

			WString DeserializeString(Ptr<ParsingTreeToken> token)
			{
				const WString& value=token->GetValue();
				return DeserializeString(value);
			}

			void SetName(WString& target, Ptr<ParsingTreeNode> node)
			{
				Ptr<ParsingTreeToken> token=node.Cast<ParsingTreeToken>();
				if(token)
				{
					target=token->GetValue();
				}
			}

			void SetText(WString& target, Ptr<ParsingTreeNode> node)
			{
				Ptr<ParsingTreeToken> token=node.Cast<ParsingTreeToken>();
				if(token)
				{
					target=DeserializeString(token);
				}
			}

			extern Ptr<ParsingTreeCustomBase> Deserialize(Ptr<ParsingTreeObject> node);

			template<typename T>
			void SetArray(List<Ptr<T>>& target, Ptr<ParsingTreeNode> node)
			{
				Ptr<ParsingTreeArray> source=node.Cast<ParsingTreeArray>();
				if(source)
				{
					for(vint i=0;i<source->Count();i++)
					{
						target.Add(Deserialize(source->GetItem(i).Cast<ParsingTreeObject>()).Cast<T>());
					}
				}
			}

			void SetArray(List<WString>& target, Ptr<ParsingTreeNode> node)
			{
				Ptr<ParsingTreeArray> source=node.Cast<ParsingTreeArray>();
				if(source)
				{
					for(vint i=0;i<source->Count();i++)
					{
						WString name;
						SetName(name, source->GetItem(i));
						target.Add(name);
					}
				}
			}

			template<typename T>
			void SetMember(Ptr<T>& target, Ptr<ParsingTreeNode> node)
			{
				Ptr<ParsingTreeObject> source=node.Cast<ParsingTreeObject>();
				if(source)
				{
					target=Deserialize(source).Cast<T>();
				}
			}

			Ptr<ParsingTreeCustomBase> Deserialize(Ptr<ParsingTreeObject> node)
			{
				if(!node)
				{
					return 0;
				}
				else if(node->GetType()==L"AttributeDef")
				{
					auto target = Ptr(new ParsingDefinitionAttribute);
					SetName(target->name, node->GetMember(L"name"));
					SetArray(target->arguments, node->GetMember(L"arguments"));
					for(vint i=0;i<target->arguments.Count();i++)
					{
						target->arguments[i]=DeserializeString(target->arguments[i]);
					}
					return target;
				}
				else if(node->GetType()==L"PrimitiveTypeObj")
				{
					auto target = Ptr(new ParsingDefinitionPrimitiveType);
					SetName(target->name, node->GetMember(L"name"));
					return target;
				}
				else if(node->GetType()==L"TokenTypeObj")
				{
					auto target = Ptr(new ParsingDefinitionTokenType);
					return target;
				}
				else if(node->GetType()==L"SubTypeObj")
				{
					auto target = Ptr(new ParsingDefinitionSubType);
					SetMember(target->parentType, node->GetMember(L"parentType"));
					SetName(target->subTypeName, node->GetMember(L"name"));
					return target;
				}
				else if(node->GetType()==L"ArrayTypeObj")
				{
					auto target = Ptr(new ParsingDefinitionArrayType);
					SetMember(target->elementType, node->GetMember(L"elementType"));
					return target;
				}
				else if(node->GetType()==L"ClassMemberDef")
				{
					auto target = Ptr(new ParsingDefinitionClassMemberDefinition);
					SetArray(target->attributes, node->GetMember(L"attributes"));
					SetMember(target->type, node->GetMember(L"type"));
					SetName(target->name, node->GetMember(L"name"));
					SetName(target->unescapingFunction, node->GetMember(L"unescapingFunction"));
					return target;
				}
				else if(node->GetType()==L"ClassTypeDef")
				{
					auto target = Ptr(new ParsingDefinitionClassDefinition);
					SetArray(target->attributes, node->GetMember(L"attributes"));
					SetMember(target->ambiguousType, node->GetMember(L"ambiguousType"));
					SetMember(target->parentType, node->GetMember(L"parentType"));
					SetName(target->name, node->GetMember(L"name"));
					SetArray(target->members, node->GetMember(L"members"));
					SetArray(target->subTypes, node->GetMember(L"subTypes"));
					return target;
				}
				else if(node->GetType()==L"EnumMemberDef")
				{
					auto target = Ptr(new ParsingDefinitionEnumMemberDefinition);
					SetArray(target->attributes, node->GetMember(L"attributes"));
					SetName(target->name, node->GetMember(L"name"));
					return target;
				}
				else if(node->GetType()==L"EnumTypeDef")
				{
					auto target = Ptr(new ParsingDefinitionEnumDefinition);
					SetArray(target->attributes, node->GetMember(L"attributes"));
					SetName(target->name, node->GetMember(L"name"));
					SetArray(target->members, node->GetMember(L"members"));
					return target;
				}
				else if(node->GetType()==L"PrimitiveGrammarDef")
				{
					auto target = Ptr(new ParsingDefinitionPrimitiveGrammar);
					SetName(target->name, node->GetMember(L"name"));
					return target;
				}
				else if(node->GetType()==L"TextGrammarDef")
				{
					auto target = Ptr(new ParsingDefinitionTextGrammar);
					SetText(target->text, node->GetMember(L"text"));
					return target;
				}
				else if(node->GetType()==L"SequenceGrammarDef")
				{
					auto target = Ptr(new ParsingDefinitionSequenceGrammar);
					SetMember(target->first, node->GetMember(L"first"));
					SetMember(target->second, node->GetMember(L"second"));
					return target;
				}
				else if(node->GetType()==L"AlternativeGrammarDef")
				{
					auto target = Ptr(new ParsingDefinitionAlternativeGrammar);
					SetMember(target->first, node->GetMember(L"first"));
					SetMember(target->second, node->GetMember(L"second"));
					return target;
				}
				else if(node->GetType()==L"LoopGrammarDef")
				{
					auto target = Ptr(new ParsingDefinitionLoopGrammar);
					SetMember(target->grammar, node->GetMember(L"grammar"));
					return target;
				}
				else if(node->GetType()==L"OptionalGrammarDef")
				{
					auto target = Ptr(new ParsingDefinitionOptionalGrammar);
					SetMember(target->grammar, node->GetMember(L"grammar"));
					return target;
				}
				else if(node->GetType()==L"CreateGrammarDef")
				{
					auto target = Ptr(new ParsingDefinitionCreateGrammar);
					SetMember(target->grammar, node->GetMember(L"grammar"));
					SetMember(target->type, node->GetMember(L"type"));
					return target;
				}
				else if(node->GetType()==L"AssignGrammarDef")
				{
					auto target = Ptr(new ParsingDefinitionAssignGrammar);
					SetMember(target->grammar, node->GetMember(L"grammar"));
					SetName(target->memberName, node->GetMember(L"memberName"));
					return target;
				}
				else if(node->GetType()==L"UseGrammarDef")
				{
					auto target = Ptr(new ParsingDefinitionUseGrammar);
					SetMember(target->grammar, node->GetMember(L"grammar"));
					return target;
				}
				else if(node->GetType()==L"SetterGrammarDef")
				{
					auto target = Ptr(new ParsingDefinitionSetterGrammar);
					SetMember(target->grammar, node->GetMember(L"grammar"));
					SetName(target->memberName, node->GetMember(L"memberName"));
					SetText(target->value, node->GetMember(L"value"));
					return target;
				}
				else if(node->GetType()==L"TokenDef")
				{
					auto target = Ptr(new ParsingDefinitionTokenDefinition);
					SetArray(target->attributes, node->GetMember(L"attributes"));
					SetName(target->name, node->GetMember(L"name"));
					SetText(target->regex, node->GetMember(L"regex"));

					Ptr<ParsingTreeToken> token=node->GetMember(L"discard").Cast<ParsingTreeToken>();
					target->discard=(token && token->GetValue()==L"DiscardToken");
					return target;
				}
				else if(node->GetType()==L"RuleDef")
				{
					auto target = Ptr(new ParsingDefinitionRuleDefinition);
					SetArray(target->attributes, node->GetMember(L"attributes"));
					SetName(target->name, node->GetMember(L"name"));
					SetMember(target->type, node->GetMember(L"type"));
					SetArray(target->grammars, node->GetMember(L"grammars"));
					return target;
				}
				else if(node->GetType()==L"ParserDef")
				{
					auto target = Ptr(new ParsingDefinition);
					Ptr<ParsingTreeArray> defs=node->GetMember(L"definitions").Cast<ParsingTreeArray>();
					if(defs)
					{
						vint count=defs->Count();
						for(vint i=0;i<count;i++)
						{
							Ptr<ParsingTreeObject> def=defs->GetItem(i).Cast<ParsingTreeObject>();
							Ptr<ParsingTreeCustomBase> defObject=Deserialize(def);
							if(Ptr<ParsingDefinitionTypeDefinition> defType=defObject.Cast<ParsingDefinitionTypeDefinition>())
							{
								target->types.Add(defType);
							}
							else if(Ptr<ParsingDefinitionTokenDefinition> defToken=defObject.Cast<ParsingDefinitionTokenDefinition>())
							{
								target->tokens.Add(defToken);
							}
							else if(Ptr<ParsingDefinitionRuleDefinition> defRule=defObject.Cast<ParsingDefinitionRuleDefinition>())
							{
								target->rules.Add(defRule);
							}
						}
					}
					return target;
				}
				else
				{
					return 0;
				}
			}

			Ptr<ParsingDefinition> DeserializeDefinition(Ptr<ParsingTreeNode> node)
			{
				return Deserialize(node.Cast<ParsingTreeObject>()).Cast<ParsingDefinition>();
			}
		}
	}
}


/***********************************************************************
.\PARSINGLOGGING.CPP
***********************************************************************/
/***********************************************************************
Author: Zihan Chen (vczh)
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	using namespace stream;
	using namespace collections;

	namespace parsing
	{
		namespace definitions
		{
			void LogString(const WString& input, TextWriter& writer)
			{
				writer.WriteChar(L'\"');
				for(int i=0;i<input.Length();i++)
				{
					if(input[i]==L'\"')
					{
						writer.WriteString(L"\"\"");
					}
					else
					{
						writer.WriteChar(input[i]);
					}
				}
				writer.WriteChar(L'\"');
			}

			WString SerializeString(const WString& value)
			{
				return GenerateToStream([&](StreamWriter& writer)
				{
					LogString(value, writer);
				});
			}

			void LogAttributeList(ParsingDefinitionBase* definition, TextWriter& writer)
			{
				for(vint i=0;i<definition->attributes.Count();i++)
				{
					ParsingDefinitionAttribute* att=definition->attributes[i].Obj();
					if(i>0) writer.WriteChar(L',');
					writer.WriteString(L" @");
					writer.WriteString(att->name);
					writer.WriteChar(L'(');
					for(vint j=0;j<att->arguments.Count();j++)
					{
						if(j>0) writer.WriteString(L", ");
						LogString(att->arguments[j], writer);
					}
					writer.WriteChar(L')');
				}
			}

/***********************************************************************
Logger (ParsingDefinitionType)
***********************************************************************/

			class ParsingDefinitionTypeLogger : public Object, public ParsingDefinitionType::IVisitor
			{
			public:
				TextWriter&		writer;

				ParsingDefinitionTypeLogger(TextWriter& _writer)
					:writer(_writer)
				{
				}

				static void LogInternal(ParsingDefinitionType* type, TextWriter& writer)
				{
					ParsingDefinitionTypeLogger visitor(writer);
					type->Accept(&visitor);
				}

				void Visit(ParsingDefinitionPrimitiveType* node)override
				{
					writer.WriteString(node->name);
				}

				void Visit(ParsingDefinitionTokenType* node)override
				{
					writer.WriteString(L"token");
				}

				void Visit(ParsingDefinitionSubType* node)override
				{
					LogInternal(node->parentType.Obj(), writer);
					writer.WriteString(L".");
					writer.WriteString(node->subTypeName);
				}

				void Visit(ParsingDefinitionArrayType* node)override
				{
					LogInternal(node->elementType.Obj(), writer);
					writer.WriteString(L"[]");
				}
			};

			void Log(ParsingDefinitionType* type, TextWriter& writer)
			{
				ParsingDefinitionTypeLogger::LogInternal(type, writer);
			}

/***********************************************************************
Logger (ParsingDefinitionTypeDefinition)
***********************************************************************/

			class ParsingDefinitionTypeDefinitionLogger : public Object, public ParsingDefinitionTypeDefinition::IVisitor
			{
			public:
				WString			prefix;
				TextWriter&		writer;

				static void LogInternal(ParsingDefinitionTypeDefinition* definition, const WString& prefix, TextWriter& writer)
				{
					ParsingDefinitionTypeDefinitionLogger visitor(prefix, writer);
					definition->Accept(&visitor);
				}

				ParsingDefinitionTypeDefinitionLogger(const WString& _prefix, TextWriter& _writer)
					:prefix(_prefix)
					,writer(_writer)
				{
				}

				void Visit(ParsingDefinitionClassMemberDefinition* node)override
				{
					writer.WriteString(prefix);
					Log(node->type.Obj(), writer);
					writer.WriteString(L" ");
					writer.WriteString(node->name);
					if(node->unescapingFunction!=L"")
					{
						writer.WriteString(L" (");
						writer.WriteString(node->unescapingFunction);
						writer.WriteString(L")");
					}
					LogAttributeList(node, writer);
					writer.WriteLine(L";");
				}

				void Visit(ParsingDefinitionClassDefinition* node)override
				{
					writer.WriteString(prefix);
					writer.WriteString(L"class ");
					writer.WriteString(node->name);
					if(node->ambiguousType)
					{
						writer.WriteString(L" ambiguous(");
						Log(node->ambiguousType.Obj(), writer);
						writer.WriteString(L")");
					}
					if(node->parentType)
					{
						writer.WriteString(L" : ");
						Log(node->parentType.Obj(), writer);
					}
					LogAttributeList(node, writer);
					writer.WriteLine(L"");

					writer.WriteString(prefix);
					writer.WriteLine(L"{");

					for(int i=0;i<node->subTypes.Count();i++)
					{
						LogInternal(node->subTypes[i].Obj(), prefix+L"    ", writer);
						writer.WriteLine(L"");
					}

					for(int i=0;i<node->members.Count();i++)
					{
						LogInternal(node->members[i].Obj(), prefix+L"    ", writer);
					}

					writer.WriteString(prefix);
					writer.WriteLine(L"}");
				}

				void Visit(ParsingDefinitionEnumMemberDefinition* node)override
				{
					writer.WriteString(prefix);
					writer.WriteString(node->name);
					LogAttributeList(node, writer);
					writer.WriteLine(L",");
				}

				void Visit(ParsingDefinitionEnumDefinition* node)override
				{
					writer.WriteString(prefix);
					writer.WriteString(L"enum ");
					writer.WriteString(node->name);
					LogAttributeList(node, writer);
					writer.WriteLine(L"");

					writer.WriteString(prefix);
					writer.WriteLine(L"{");

					for(int i=0;i<node->members.Count();i++)
					{
						LogInternal(node->members[i].Obj(), prefix+L"    ", writer);
					}

					writer.WriteString(prefix);
					writer.WriteLine(L"}");
				}
			};

			void Log(ParsingDefinitionTypeDefinition* definition, const WString& prefix, TextWriter& writer)
			{
				ParsingDefinitionTypeDefinitionLogger::LogInternal(definition, prefix, writer);
			}

/***********************************************************************
Logger (ParsingDefinitionGrammar)
***********************************************************************/

#define PRIORITY_NONE			0
#define PRIORITY_CREATE			1
#define PRIORITY_SET			1
#define PRIORITY_ALTERNATIVE	2
#define PRIORITY_SEQUENCE		3
#define PRIORITY_USE			4
#define PRIORITY_ASSIGN			4

			class ParsingDefinitionGrammarLogger : public Object, public ParsingDefinitionGrammar::IVisitor
			{
			public:
				TextWriter&					writer;
				int							parentPriority;
				ParsingDefinitionGrammar*	stateNode;
				bool						beforeNode;

				ParsingDefinitionGrammarLogger(TextWriter& _writer, int _parentPriority, ParsingDefinitionGrammar* _stateNode, bool _beforeNode)
					:writer(_writer)
					,parentPriority(_parentPriority)
					,stateNode(_stateNode)
					,beforeNode(_beforeNode)
				{
				}

				static void LogInternal(ParsingDefinitionGrammar* grammar, int parentPriority, ParsingDefinitionGrammar* stateNode, bool beforeNode, TextWriter& writer)
				{
					if(grammar==stateNode && beforeNode)
					{
						writer.WriteString(L"@");
					}
					ParsingDefinitionGrammarLogger visitor(writer, parentPriority, stateNode, beforeNode);
					grammar->Accept(&visitor);
					if(grammar==stateNode && !beforeNode)
					{
						writer.WriteString(L"@");
					}
				}

				void LogInternal(ParsingDefinitionGrammar* grammar, int parentPriority, TextWriter& writer)
				{
					LogInternal(grammar, parentPriority, stateNode, beforeNode, writer);
				}

				void Visit(ParsingDefinitionPrimitiveGrammar* node)override
				{
					writer.WriteString(node->name);
				}

				void Visit(ParsingDefinitionTextGrammar* node)override
				{
					LogString(node->text, writer);
				}

				void Visit(ParsingDefinitionSequenceGrammar* node)override
				{
					int priority=PRIORITY_SEQUENCE;
					if(parentPriority>priority)
					{
						writer.WriteString(L"( ");
					}
					LogInternal(node->first.Obj(), priority, writer);
					writer.WriteString(L" ");
					LogInternal(node->second.Obj(), priority, writer);
					if(parentPriority>priority)
					{
						writer.WriteString(L" )");
					}
				}

				void Visit(ParsingDefinitionAlternativeGrammar* node)override
				{
					int priority=PRIORITY_ALTERNATIVE;
					if(parentPriority>priority)
					{
						writer.WriteString(L"( ");
					}
					LogInternal(node->first.Obj(), priority, writer);
					writer.WriteString(L" | ");
					LogInternal(node->second.Obj(), priority, writer);
					if(parentPriority>priority)
					{
						writer.WriteString(L" )");
					}
				}

				void Visit(ParsingDefinitionLoopGrammar* node)override
				{
					writer.WriteString(L"{ ");
					LogInternal(node->grammar.Obj(), PRIORITY_NONE, writer);
					writer.WriteString(L" }");
				}

				void Visit(ParsingDefinitionOptionalGrammar* node)override
				{
					writer.WriteString(L"[ ");
					LogInternal(node->grammar.Obj(), PRIORITY_NONE, writer);
					writer.WriteString(L" ]");
				}

				void Visit(ParsingDefinitionCreateGrammar* node)override
				{
					int priority=PRIORITY_CREATE;
					if(parentPriority>priority)
					{
						writer.WriteString(L"( ");
					}
					LogInternal(node->grammar.Obj(), priority, writer);
					writer.WriteString(L" as ");
					Log(node->type.Obj(), writer);
					if(parentPriority>priority)
					{
						writer.WriteString(L" )");
					}
				}

				void Visit(ParsingDefinitionAssignGrammar* node)override
				{
					int priority=PRIORITY_ASSIGN;
					if(parentPriority>priority)
					{
						writer.WriteString(L"( ");
					}
					LogInternal(node->grammar.Obj(), priority, writer);
					writer.WriteString(L" : ");
					writer.WriteString(node->memberName);
					if(parentPriority>priority)
					{
						writer.WriteString(L" )");
					}
				}

				void Visit(ParsingDefinitionUseGrammar* node)override
				{
					int priority=PRIORITY_USE;
					if(parentPriority>priority)
					{
						writer.WriteString(L"( ");
					}
					writer.WriteString(L"!");
					LogInternal(node->grammar.Obj(), priority, writer);
					if(parentPriority>priority)
					{
						writer.WriteString(L" )");
					}
				}

				void Visit(ParsingDefinitionSetterGrammar* node)override
				{
					int priority=PRIORITY_SET;
					if(parentPriority>priority)
					{
						writer.WriteString(L"( ");
					}
					LogInternal(node->grammar.Obj(), priority, writer);
					writer.WriteString(L" with { ");
					writer.WriteString(node->memberName);
					writer.WriteString(L" = ");
					LogString(node->value, writer);
					writer.WriteString(L" }");
					if(parentPriority>priority)
					{
						writer.WriteString(L" )");
					}
				}
			};

			void Log(ParsingDefinitionGrammar* grammar, TextWriter& writer)
			{
				ParsingDefinitionGrammarLogger::LogInternal(grammar, PRIORITY_NONE, 0, true, writer);
			}

			void Log(ParsingDefinitionGrammar* grammar, ParsingDefinitionGrammar* stateNode, bool beforeNode, TextWriter& writer)
			{
				ParsingDefinitionGrammarLogger::LogInternal(grammar, PRIORITY_NONE, stateNode, beforeNode, writer);
			}

#undef PRIORITY_NONE
#undef PRIORITY_CREATE
#undef PRIORITY_SET
#undef PRIORITY_ALTERNATIVE
#undef PRIORITY_SEQUENCE
#undef PRIORITY_USE
#undef PRIORITY_ASSIGN

/***********************************************************************
FindAppropriateGrammarState
***********************************************************************/

			class FindAppropriateGrammarStateVisitor : public Object, public ParsingDefinitionGrammar::IVisitor
			{
			public:
				ParsingDefinitionGrammar*	stateNode;
				bool						beforeNode;
				ParsingDefinitionGrammar*	beforeReference;
				ParsingDefinitionGrammar*	afterReference;
				ParsingDefinitionGrammar*	result;

				FindAppropriateGrammarStateVisitor(ParsingDefinitionGrammar* _stateNode, bool _beforeNode, ParsingDefinitionGrammar* _beforeReference, ParsingDefinitionGrammar* _afterReference)
					:stateNode(_stateNode)
					,beforeNode(_beforeNode)
					,beforeReference(_beforeReference)
					,afterReference(_afterReference)
					,result(0)
				{
				}

				static ParsingDefinitionGrammar* Find(ParsingDefinitionGrammar* grammar, ParsingDefinitionGrammar* stateNode, bool beforeNode, ParsingDefinitionGrammar* beforeReference, ParsingDefinitionGrammar* afterReference)
				{
					if(grammar==stateNode)
					{
						return
							beforeNode
							?(beforeReference?beforeReference:stateNode)
							:(afterReference?afterReference:stateNode)
							;
					}
					else
					{
						FindAppropriateGrammarStateVisitor visitor(stateNode, beforeNode, beforeReference, afterReference);
						grammar->Accept(&visitor);
						return visitor.result;
					}
				}

				void Visit(ParsingDefinitionPrimitiveGrammar* node)override
				{
				}

				void Visit(ParsingDefinitionTextGrammar* node)override
				{
				}

				void Visit(ParsingDefinitionSequenceGrammar* node)override
				{
					result=Find(node->first.Obj(), stateNode, beforeNode, (beforeReference?beforeReference:node), 0);
					if(!result)
					{
						result=Find(node->second.Obj(), stateNode, beforeNode, 0, (afterReference?afterReference:node));
					}
				}

				void Visit(ParsingDefinitionAlternativeGrammar* node)override
				{
					result=Find(node->first.Obj(), stateNode, beforeNode, (beforeReference?beforeReference:node), (afterReference?afterReference:node));
					if(!result)
					{
						result=Find(node->second.Obj(), stateNode, beforeNode, (beforeReference?beforeReference:node), (afterReference?afterReference:node));
					}
				}

				void Visit(ParsingDefinitionLoopGrammar* node)override
				{
					result=Find(node->grammar.Obj(), stateNode, beforeNode, (beforeReference?beforeReference:node), (afterReference?afterReference:node));
				}

				void Visit(ParsingDefinitionOptionalGrammar* node)override
				{
					result=Find(node->grammar.Obj(), stateNode, beforeNode, (beforeReference?beforeReference:node), (afterReference?afterReference:node));
				}

				void Visit(ParsingDefinitionCreateGrammar* node)override
				{
					result=Find(node->grammar.Obj(), stateNode, beforeNode, (beforeReference?beforeReference:node), (afterReference?afterReference:node));
				}

				void Visit(ParsingDefinitionAssignGrammar* node)override
				{
					result=Find(node->grammar.Obj(), stateNode, beforeNode, (beforeReference?beforeReference:node), (afterReference?afterReference:node));
				}

				void Visit(ParsingDefinitionUseGrammar* node)override
				{
					result=Find(node->grammar.Obj(), stateNode, beforeNode, (beforeReference?beforeReference:node), (afterReference?afterReference:node));
				}

				void Visit(ParsingDefinitionSetterGrammar* node)override
				{
					result=Find(node->grammar.Obj(), stateNode, beforeNode, beforeReference, afterReference);
				}
			};

/***********************************************************************
Logger (ParsingDefinitionGrammar)
***********************************************************************/

			WString TypeToString(ParsingDefinitionType* type)
			{
				return GenerateToStream([&](StreamWriter& writer)
				{
					Log(type, writer);
				}, 64);
			}

			WString GrammarToString(ParsingDefinitionGrammar* grammar)
			{
				return GrammarStateToString(grammar, 0, true);
			}

			WString GrammarStateToString(ParsingDefinitionGrammar* grammar, ParsingDefinitionGrammar* stateNode, bool beforeNode)
			{
				return GenerateToStream([&](StreamWriter& writer)
				{
					Log(grammar, stateNode, beforeNode, writer);
				}, 64);
			}

			ParsingDefinitionGrammar* FindAppropriateGrammarState(ParsingDefinitionGrammar* grammar, ParsingDefinitionGrammar* stateNode, bool beforeNode)
			{
				return FindAppropriateGrammarStateVisitor::Find(grammar, stateNode, beforeNode, 0, 0);
			}

			void Log(Ptr<ParsingDefinition> definition, TextWriter& writer)
			{
				for (auto type : definition->types)
				{
					Log(type.Obj(), L"", writer);
					writer.WriteLine(L"");
				}

				for (auto token : definition->tokens)
				{
					if(token->discard)
					{
						writer.WriteString(L"discardtoken ");
					}
					else
					{
						writer.WriteString(L"token ");
					}
					writer.WriteString(token->name);
					writer.WriteString(L" = ");
					LogString(token->regex, writer);
					LogAttributeList(token.Obj(), writer);
					writer.WriteLine(L";");
				}
				writer.WriteLine(L"");

				for (auto rule : definition->rules)
				{
					writer.WriteString(L"rule ");
					Log(rule->type.Obj(), writer);
					writer.WriteString(L" ");
					writer.WriteString(rule->name);
					LogAttributeList(rule.Obj(), writer);
					writer.WriteLine(L"");

					for (auto grammar : rule->grammars)
					{
						writer.WriteString(L"        = ");
						Log(grammar.Obj(), writer);
						writer.WriteLine(L"");
					}
					writer.WriteLine(L"        ;");
				}
			}
		}

		namespace analyzing
		{
/***********************************************************************
Logger (Automaton)
***********************************************************************/

			void LogTransitionSymbol(ParsingSymbol* symbol, stream::TextWriter& writer)
			{
				if (symbol->GetType() == ParsingSymbol::TokenDef)
				{
					writer.WriteString(L"[");
					writer.WriteString(symbol->GetName());

					U32String regex = wtou32(symbol->GetDescriptorString());
					if (regex_internal::IsRegexEscapedLiteralString(regex))
					{
						writer.WriteString(L" ");
						definitions::LogString(u32tow(regex_internal::UnescapeTextForRegex(regex)), writer);
					}
					writer.WriteString(L"]");
				}
				else
				{
					writer.WriteString(L"<");
					writer.WriteString(symbol->GetName());
					writer.WriteString(L">");
				}
			}

			void Log(Ptr<Automaton> automaton, stream::TextWriter& writer)
			{
				for (auto ruleInfo : automaton->ruleInfos)
				{
					writer.WriteString(L"Root Rule Start: ");
					writer.WriteLine(ruleInfo->rootRuleStartState->stateName);

					writer.WriteString(L"Root Rule End: ");
					writer.WriteLine(ruleInfo->rootRuleEndState->stateName);

					writer.WriteString(L"Rule Start: ");
					writer.WriteLine(ruleInfo->startState->stateName);

					for (auto endState : ruleInfo->endStates)
					{
						writer.WriteString(L"Rule End: ");
						writer.WriteLine(endState->stateName);
					}

					writer.WriteLine(L"");
				}

				List<State*> states;
				for (auto ruleInfo : automaton->ruleInfos)
				{
					vint currentState=states.Count();
					states.Add(ruleInfo->rootRuleStartState);

					while(currentState<states.Count())
					{
						State* state=states[currentState++];
						writer.WriteLine(state->stateExpression);
						if(state->endState)
						{
							writer.WriteString(L"END STATE ");
						}
						else
						{
							writer.WriteString(L"STATE ");
						}
						writer.WriteLine(state->stateName);

						for (auto transition : state->transitions)
						{
							if(!states.Contains(transition->target))
							{
								states.Add(transition->target);
							}
							switch(transition->transitionType)
							{
							case Transition::Epsilon:
								writer.WriteString(L"    EPSILON");
								break;
							case Transition::TokenBegin:
								writer.WriteString(L"    TOKEN-BEGIN");
								break;
							case Transition::TokenFinish:
								writer.WriteString(L"    TOKEN-FINISH");
								break;
							case Transition::NormalReduce:
								writer.WriteString(L"    NORMAL-REDUCE");
								break;
							case Transition::LeftRecursiveReduce:
								writer.WriteString(L"    LREC-REDUCE");
								break;
							case Transition::Symbol:
								{
									writer.WriteString(L"    ");
									if(transition->transitionSymbol)
									{
										LogTransitionSymbol(transition->transitionSymbol, writer);
									}
								}
								break;
							}
							switch(transition->stackOperationType)
							{
							case Transition::None:
								writer.WriteString(L" => ");
								break;
							case Transition::ShiftReduceCompacted:
								writer.WriteString(L" [SHIFT-REDUCE-COMPACTED] => ");
								break;
							case Transition::LeftRecursive:
								writer.WriteString(L" [LEFT-RECURSIVE] => ");
								break;
							}
							writer.WriteLine(transition->target->stateName);

							for (auto action : transition->actions)
							{
								switch(action->actionType)
								{
								case Action::Create:
									writer.WriteString(L"        CREATE ");
									break;
								case Action::Assign:
									writer.WriteString(L"        ASSIGN ");
									break;
								case Action::Using:
									writer.WriteString(L"        USING ");
									break;
								case Action::Setter:
									writer.WriteString(L"        SET ");
									break;
								case Action::Shift:
									writer.WriteString(L"        SHIFT ");
									break;
								case Action::Reduce:
									writer.WriteString(L"        REDUCE ");
									break;
								case Action::LeftRecursiveReduce:
									writer.WriteString(L"        LR-REDUCE ");
									break;
								}

								if(action->shiftReduceSource && action->shiftReduceTarget)
								{
									writer.WriteString(L"[");
									writer.WriteString(action->shiftReduceSource->stateName);
									writer.WriteString(L" => ");
									writer.WriteString(action->shiftReduceTarget->stateName);
									writer.WriteString(L"] ");
								}

								if(action->actionSource)
								{
									writer.WriteString(action->actionSource->GetName());
								}
								if(action->actionTarget)
								{
									writer.WriteString(L" => ");
									writer.WriteString(action->actionTarget->GetName());
								}
								writer.WriteLine(L"");
							}
						}
						writer.WriteLine(L"");
					}
					writer.WriteLine(L"--------------------------------");
				}
			}
		}

		namespace tabling
		{
/***********************************************************************
Logger (ParsingTable)
***********************************************************************/

			void LogAttributeList(Ptr<ParsingTable> table, vint attributeIndex, const WString& prefix, stream::TextWriter& writer)
			{
				if(attributeIndex!=-1)
				{
					Ptr<ParsingTable::AttributeInfoList> atts=table->GetAttributeInfo(attributeIndex);
					for (auto att : atts->attributes)
					{
						writer.WriteString(prefix);
						writer.WriteString(L"@");
						writer.WriteString(att->name);
						writer.WriteString(L"(");
						for(vint i=0;i<att->arguments.Count();i++)
						{
							if(i>0) writer.WriteString(L", ");
							definitions::LogString(att->arguments[i], writer);
						}
						writer.WriteLine(L")");
					}
				}
			}

			void Log(Ptr<ParsingTable> table, stream::TextWriter& writer)
			{
				vint rows=table->GetStateCount()+1;
				vint columns=table->GetTokenCount()+1;
				Array<WString> stringTable(rows*columns);

				stringTable[0]=L"<Parsing Table>";

				for(vint row=0; row<table->GetStateCount();row++)
				{
					stringTable[(row+1)*columns]=itow(row)+L": "+table->GetStateInfo(row).stateName;
				}

				for(vint column=0;column<table->GetTokenCount();column++)
				{
					WString content=
						column==ParsingTable::TokenBegin?L"0: $TokenBegin":
						column==ParsingTable::TokenFinish?L"1: $TokenFinish":
						column==ParsingTable::NormalReduce?L"2: $NormalReduce":
						column==ParsingTable::LeftRecursiveReduce?L"3: $LeftRecursiveReduce":
						itow(column)+L": "+table->GetTokenInfo(column).name+L"\r\n  "+table->GetTokenInfo(column).regex;
					stringTable[column+1]=content;
				}

				for(vint row=0; row<table->GetStateCount();row++)
				{
					for(vint column=0;column<table->GetTokenCount();column++)
					{
						Ptr<ParsingTable::TransitionBag> bag=table->GetTransitionBag(row, column);
						if(bag)
						{
							WString content;
							for (auto item : bag->transitionItems)
							{
								if(content!=L"") content+=L"\r\n";
								content+=itow(item->targetState);
								for (auto [state, index] : indexed(item->stackPattern))
								{
									content+=(index==0?L" : ":L", ");
									content+=itow(state);
								}
								content+=L"\r\n";

								for (auto lookAhead : item->lookAheads)
								{
									content+=L"  ";
									for (auto [token, index] : indexed(lookAhead->tokens))
									{
										content+=(index==0?L"> ":L", ");
										content+=itow(token);
									}
									content+=L"\r\n";
								}

								content+=L"  ";
								for (auto ins : item->instructions)
								{
									switch(ins.instructionType)
									{
									case ParsingTable::Instruction::Create:
										content+=L"C";
										break;
									case ParsingTable::Instruction::Using:
										content+=L"U";
										break;
									case ParsingTable::Instruction::Assign:
										content+=L"A";
										break;
									case ParsingTable::Instruction::Item:
										content+=L"I";
										break;
									case ParsingTable::Instruction::Setter:
										content+=L"S";
										break;
									case ParsingTable::Instruction::Shift:
										content+=L"[+"+itow(ins.stateParameter)+L"]";
										break;
									case ParsingTable::Instruction::Reduce:
										content+=L"[-"+itow(ins.stateParameter)+L"]";
										break;
									case ParsingTable::Instruction::LeftRecursiveReduce:
										content+=L"[!"+itow(ins.stateParameter)+L"]";
										break;
									}
								}
							}
							stringTable[(row+1)*columns+(column+1)]=content;
						}
					}
				}

				writer.WriteLine(L"Target-State : Stack-Pattern ...");
				writer.WriteLine(L"> Look-Ahead ...");
				writer.WriteLine(L"C: Create");
				writer.WriteLine(L"U: Using");
				writer.WriteLine(L"A: Assign");
				writer.WriteLine(L"I: Item");
				writer.WriteLine(L"S: Setter");
				writer.WriteLine(L"[+s]: Shift[push s]");
				writer.WriteLine(L"[-s]: Reduce[pop s]");
				writer.WriteLine(L"[!s]: Left-Recursive-Reduce[fake s]");
				writer.WriteLine(L"");

				for(vint i=0;i<table->GetRuleCount();i++)
				{
					const ParsingTable::RuleInfo& ruleInfo=table->GetRuleInfo(i);
					writer.WriteString(ruleInfo.name);
					writer.WriteChar(L'<');
					writer.WriteString(ruleInfo.type);
					if(ruleInfo.ambiguousType!=L"")
					{
						writer.WriteString(L", ");
						writer.WriteString(ruleInfo.ambiguousType);
					}
					writer.WriteString(L">: ");
					writer.WriteString(itow(ruleInfo.rootStartState));
					writer.WriteChar(L'[');
					writer.WriteString(table->GetStateInfo(ruleInfo.rootStartState).stateName);
					writer.WriteChar(L']');
					writer.WriteLine(L"");
				}

				WriteMonospacedEnglishTable(writer, stringTable, rows, columns);
				writer.WriteLine(L"");

				writer.WriteLine(L"Metadata(Tokens):");
				for(vint i=0;i<table->GetTokenCount();i++)
				{
					const ParsingTable::TokenInfo& info=table->GetTokenInfo(i);
					writer.WriteString(L"    ");
					writer.WriteString(info.name);
					writer.WriteString(L"=");
					writer.WriteLine(info.regex);
					LogAttributeList(table, info.attributeIndex, L"        ", writer);
				}
				writer.WriteLine(L"");

				writer.WriteLine(L"Metadata(Rules):");
				for(vint i=0;i<table->GetRuleCount();i++)
				{
					const ParsingTable::RuleInfo& info=table->GetRuleInfo(i);
					writer.WriteString(L"    ");
					writer.WriteLine(info.name);
					LogAttributeList(table, info.attributeIndex, L"        ", writer);
				}
				writer.WriteLine(L"");

				writer.WriteLine(L"Metadata(Classes):");
				for(vint i=0;i<table->GetTreeTypeInfoCount();i++)
				{
					const ParsingTable::TreeTypeInfo& info=table->GetTreeTypeInfo(i);
					writer.WriteString(L"    ");
					writer.WriteLine(info.type);
					LogAttributeList(table, info.attributeIndex, L"        ", writer);
				}
				writer.WriteLine(L"");

				writer.WriteLine(L"Metadata(Class Members):");
				for(vint i=0;i<table->GetTreeFieldInfoCount();i++)
				{
					const ParsingTable::TreeFieldInfo& info=table->GetTreeFieldInfo(i);
					writer.WriteString(L"    ");
					writer.WriteString(info.type);
					writer.WriteString(L".");
					writer.WriteLine(info.field);
					LogAttributeList(table, info.attributeIndex, L"        ", writer);
				}
				writer.WriteLine(L"");
			}
		}

/***********************************************************************
Logger (ParsingTreeNode)
***********************************************************************/

		class LogParsingTreeNodeVisitor : public Object, public ParsingTreeNode::IVisitor
		{
		protected:
			TextWriter&				writer;
			WString					prefix;
			WString					originalInput;
		public:
			LogParsingTreeNodeVisitor(TextWriter& _writer, const WString& _originalInput, const WString& _prefix)
				:writer(_writer)
				,prefix(_prefix)
				,originalInput(_originalInput)
			{
			}

			void Write(ParsingTreeNode* node)
			{
				if(node)
				{
					node->Accept(this);
				}
				else
				{
					writer.WriteString(L"null");
				}
			}

			void WriteInput(ParsingTreeNode* node)
			{
				if(originalInput!=L"")
				{
					ParsingTextRange range=node->GetCodeRange();
					if(range.start.index!=ParsingTextPos::UnknownValue && range.end.index!=ParsingTextPos::UnknownValue)
					{
						vint start=range.start.index;
						vint length=range.end.index-start+1;
						if(length>0)
						{
							writer.WriteString(L" // [");
							writer.WriteString(originalInput.Sub(start, length));
							writer.WriteString(L"]");
						}
					}
				}
			}

			void Visit(ParsingTreeToken* node)
			{
				writer.WriteChar(L'[');
				writer.WriteString(node->GetValue());
				writer.WriteChar(L']');
				WriteInput(node);
			}

			void Visit(ParsingTreeObject* node)
			{
				WString oldPrefix=prefix;
				writer.WriteString(node->GetType());
				writer.WriteString(L" <");
				for(vint i=0;i<node->GetCreatorRules().Count();i++)
				{
					if(i!=0) writer.WriteString(L", ");
					writer.WriteString(node->GetCreatorRules()[i]);
				}
				writer.WriteString(L"> {");
				WriteInput(node);
				writer.WriteLine(L"");
				prefix+=L"    ";
				for(vint i=0;i<node->GetMembers().Count();i++)
				{
					writer.WriteString(prefix);
					writer.WriteString(node->GetMembers().Keys().Get(i));
					writer.WriteString(L" = ");
					Write(node->GetMembers().Values().Get(i).Obj());
					writer.WriteLine(L"");
				}
				prefix=oldPrefix;
				writer.WriteString(prefix);
				writer.WriteString(L"}");
			}

			void Visit(ParsingTreeArray* node)
			{
				WString oldPrefix=prefix;
				writer.WriteString(node->GetElementType());
				writer.WriteString(L"[] {");
				WriteInput(node);
				writer.WriteLine(L"");
				prefix+=L"    ";
				for(vint i=0;i<node->Count();i++)
				{
					writer.WriteString(prefix);
					Write(node->GetItem(i).Obj());
					writer.WriteLine(L",");
				}
				prefix=oldPrefix;
				writer.WriteString(prefix);
				writer.WriteString(L"}");
			}
		};

		void Log(ParsingTreeNode* node, const WString& originalInput, stream::TextWriter& writer, const WString& prefix)
		{
			writer.WriteString(prefix);
			LogParsingTreeNodeVisitor visitor(writer, originalInput, prefix);
			node->Accept(&visitor);
		}
	}
}

/***********************************************************************
.\PARSINGSTATE.CPP
***********************************************************************/
/***********************************************************************
Author: Zihan Chen (vczh)
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


#if defined(VCZH_GCC) && defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wnull-dereference"
#endif

namespace vl
{
	namespace parsing
	{
		namespace tabling
		{
			using namespace collections;
			using namespace regex;

/***********************************************************************
ParsingTokenWalker::LookAheadEnumerator
***********************************************************************/

			ParsingTokenWalker::LookAheadEnumerator::LookAheadEnumerator(const ParsingTokenWalker* _walker, vint _currentToken)
				:walker(_walker)
				,firstToken(_currentToken)
				,currentToken(_currentToken)
				,currentValue(-1)
				,index(-1)
			{
			}

			ParsingTokenWalker::LookAheadEnumerator::LookAheadEnumerator(const LookAheadEnumerator& _enumerator)
				:walker(_enumerator.walker)
				,firstToken(_enumerator.firstToken)
				,currentToken(_enumerator.currentToken)
				,currentValue(_enumerator.currentValue)
				,index(_enumerator.index)
			{
			}

			IEnumerator<vint>* ParsingTokenWalker::LookAheadEnumerator::Clone()const
			{
				return new LookAheadEnumerator(*this);
			}

			const vint& ParsingTokenWalker::LookAheadEnumerator::Current()const
			{
				return currentValue;
			}

			vint ParsingTokenWalker::LookAheadEnumerator::Index()const
			{
				return index;
			}

			bool ParsingTokenWalker::LookAheadEnumerator::Next()
			{
				vint newToken=walker->GetNextIndex(currentToken);
				if(newToken==-3) return false;
				currentToken=newToken;
				index++;
				currentValue=walker->GetTableTokenIndex(currentToken);
				return true;
			}

			void ParsingTokenWalker::LookAheadEnumerator::Reset()
			{
				currentToken=firstToken;
				currentValue=-1;
				index=-1;
			}

/***********************************************************************
ParsingTokenWalker::TokenLookAhead
***********************************************************************/

			ParsingTokenWalker::TokenLookAhead::TokenLookAhead(const ParsingTokenWalker* _walker)
				:walker(_walker)
			{
			}

			collections::IEnumerator<vint>* ParsingTokenWalker::TokenLookAhead::CreateEnumerator()const
			{
				return new LookAheadEnumerator(walker, walker->currentToken);
			}

/***********************************************************************
ParsingTokenWalker::ReduceLookAhead
***********************************************************************/

			ParsingTokenWalker::ReduceLookAhead::ReduceLookAhead(const ParsingTokenWalker* _walker)
				:walker(_walker)
			{
			}

			collections::IEnumerator<vint>* ParsingTokenWalker::ReduceLookAhead::CreateEnumerator()const
			{
				return new LookAheadEnumerator(walker, walker->currentToken - 1);
			}

/***********************************************************************
ParsingTokenWalker
***********************************************************************/

			vint ParsingTokenWalker::GetNextIndex(vint index)const
			{
				if(index==-2)
				{
					return -1;
				}
				else if(-1<=index && index<tokens.Count())
				{
					index++;
					while(0<=index && index<tokens.Count())
					{
						if(table->IsInputToken(tokens[index].token))
						{
							break;
						}
						else
						{
							index++;
						}
					}
					return index;
				}
				else
				{
					return -3;
				}
			}

			vint ParsingTokenWalker::GetTableTokenIndex(vint index)const
			{
				if(index==-1)
				{
					return ParsingTable::TokenBegin;
				}
				else if(index==tokens.Count())
				{
					return ParsingTable::TokenFinish;
				}
				else if(0<=index && index<tokens.Count())
				{
					return table->GetTableTokenIndex(tokens[index].token);
				}
				else
				{
					return -1;
				}
			}

			ParsingTokenWalker::ParsingTokenWalker(collections::List<regex::RegexToken>& _tokens, Ptr<ParsingTable> _table)
				:tokens(_tokens)
				,table(_table)
				,currentToken(-2)
				, tokenLookAhead(this)
				, reduceLookAhead(this)
			{
			}

			ParsingTokenWalker::~ParsingTokenWalker()
			{
			}

			const collections::IEnumerable<vint>& ParsingTokenWalker::GetTokenLookahead()const
			{
				return tokenLookAhead;
			}

			const collections::IEnumerable<vint>& ParsingTokenWalker::GetReduceLookahead()const
			{
				return reduceLookAhead;
			}

			void ParsingTokenWalker::Reset()
			{
				currentToken=-2;
			}

			bool ParsingTokenWalker::Move()
			{
				currentToken=GetNextIndex(currentToken);
				return currentToken!=-3;
			}

			vint ParsingTokenWalker::GetTableTokenIndex()const
			{
				return GetTableTokenIndex(currentToken);
			}

			regex::RegexToken* ParsingTokenWalker::GetRegexToken()const
			{
				vint index=GetTokenIndexInStream();
				return index==-1?0:&tokens[index];
			}

			vint ParsingTokenWalker::GetTokenIndexInStream()const
			{
				if(0<=currentToken && currentToken<tokens.Count())
				{
					return currentToken;
				}
				else
				{
					return -1;
				}
			}

/***********************************************************************
ParsingState::StateGroup
***********************************************************************/

			ParsingState::StateGroup::StateGroup()
				:currentState(-1)
				,tokenSequenceIndex(0)
				,shiftToken(0)
				,reduceToken(0)
			{
			}

			ParsingState::StateGroup::StateGroup(const ParsingTable::RuleInfo& info)
				:currentState(info.rootStartState)
				,tokenSequenceIndex(0)
				,shiftToken(0)
				,reduceToken(0)
			{
			}

			ParsingState::StateGroup::StateGroup(const StateGroup& group)
				:currentState(group.currentState)
				,tokenSequenceIndex(group.tokenSequenceIndex)
				,shiftToken(group.shiftToken)
				,reduceToken(group.reduceToken)
			{
				CopyFrom(stateStack, group.stateStack);
				CopyFrom(shiftTokenStack, group.shiftTokenStack);
			}

/***********************************************************************
ParsingState
***********************************************************************/

			ParsingState::ParsingState(const WString& _input, Ptr<ParsingTable> _table, vint codeIndex)
				:input(_input.Buffer())
				,table(_table)
				,parsingRuleStartState(-1)
			{
				CopyFrom(tokens, table->GetLexer().Parse(input, {}, codeIndex));
				walker = Ptr(new ParsingTokenWalker(tokens, table));
			}

			ParsingState::~ParsingState()
			{
			}

			const WString& ParsingState::GetInput()
			{
				return input;
			}

			Ptr<ParsingTable> ParsingState::GetTable()
			{
				return table;
			}

			const collections::List<regex::RegexToken>& ParsingState::GetTokens()
			{
				return tokens;
			}

			regex::RegexToken* ParsingState::GetToken(vint index)
			{
				if(index<=0)
				{
					index=0;
				}
				else if(index>tokens.Count())
				{
					index=tokens.Count();
				}

				return index==tokens.Count()?0:&tokens[index];
			}

			vint ParsingState::Reset(const WString& rule)
			{
				const ParsingTable::RuleInfo& info=table->GetRuleInfo(rule);
				auto infoExists = &info;
				if(infoExists)
				{
					walker->Reset();
					walker->Move();
					stateGroup = Ptr(new StateGroup(info));
					parsingRule=rule;
					parsingRuleStartState=info.rootStartState;
					return stateGroup->currentState;
				}
				return -1;
			}

			WString ParsingState::GetParsingRule()
			{
				return parsingRule;
			}

			vint ParsingState::GetParsingRuleStartState()
			{
				return parsingRuleStartState;
			}

			vint ParsingState::GetCurrentToken()
			{
				return walker->GetTableTokenIndex()==ParsingTable::TokenFinish
					?tokens.Count()
					:walker->GetTokenIndexInStream();
			}

			vint ParsingState::GetCurrentTableTokenIndex()
			{
				return walker->GetTableTokenIndex();
			}

			const collections::List<vint>& ParsingState::GetStateStack()
			{
				return stateGroup->stateStack;
			}

			vint ParsingState::GetCurrentState()
			{
				return stateGroup->currentState;
			}

			void ParsingState::SkipCurrentToken()
			{
				walker->Move();
			}

			bool ParsingState::TestTransitionItemInFuture(vint tableTokenIndex, Future* future, ParsingTable::TransitionItem* item, const collections::IEnumerable<vint>* lookAheadTokens)
			{
				bool passLookAheadTest=true;
				if(item->lookAheads.Count()>0 && lookAheadTokens)
				{
					passLookAheadTest=false;
					for (auto info : item->lookAheads)
					{
						vint index=0;
						for (auto token : *lookAheadTokens)
						{
							if(info->tokens[index]!=token)
							{
								break;
							}
							index++;
							if(index>=info->tokens.Count())
							{
								break;
							}
						}
						if(index==info->tokens.Count())
						{
							passLookAheadTest=true;
							break;
						}
					}
				}
				if(!passLookAheadTest)
				{
					return false;
				}

				vint availableStackDepth=stateGroup->stateStack.Count()-future->reduceStateCount;
				vint totalStackDepth=stateGroup->stateStack.Count()-future->reduceStateCount+future->shiftStates.Count();
				if(item->stackPattern.Count()<=totalStackDepth)
				{
					if(tableTokenIndex!=ParsingTable::TokenFinish || item->stackPattern.Count()==totalStackDepth)
					{
						bool match=true;
						for(vint j=0;j<item->stackPattern.Count();j++)
						{
							vint state=
								j<future->shiftStates.Count()
								?future->shiftStates[future->shiftStates.Count()-1-j]
								:stateGroup->stateStack[availableStackDepth-1-(j-future->shiftStates.Count())]
								;
							if(item->stackPattern[j]!=state)
							{
								match=false;
							}
						}
						if(match)
						{
							return true;
						}
					}
				}
				return false;
			}

			ParsingTable::TransitionItem* ParsingState::MatchTokenInFuture(vint tableTokenIndex, Future* future, const collections::IEnumerable<vint>* lookAheadTokens)
			{
				ParsingTable::TransitionBag* bag=table->GetTransitionBag(future->currentState, tableTokenIndex).Obj();
				if(bag)
				{
					for(vint i=0;i<bag->transitionItems.Count();i++)
					{
						ParsingTable::TransitionItem* item=bag->transitionItems[i].Obj();
						if(TestTransitionItemInFuture(tableTokenIndex, future, item, lookAheadTokens))
						{
							return item;
						}
					}
				}
				return 0;
			}

			ParsingTable::TransitionItem* ParsingState::MatchToken(vint tableTokenIndex, const collections::IEnumerable<vint>* lookAheadTokens)
			{
				Future future;
				future.currentState=stateGroup->currentState;
				return MatchTokenInFuture(tableTokenIndex, &future, lookAheadTokens);
			}

			void ParsingState::RunTransitionInFuture(ParsingTable::TransitionItem* transition, Future* previous, Future* now)
			{
				if(previous)
				{
					now->reduceStateCount=previous->reduceStateCount;
					CopyFrom(now->shiftStates, previous->shiftStates);
				}
				else
				{
					now->reduceStateCount=0;
					now->shiftStates.Clear();
				}
				now->currentState=transition->targetState;
				now->selectedToken=transition->token;
				now->selectedItem=transition;
				now->previous=previous;
				now->next=0;

				for(vint j=0;j<transition->instructions.Count();j++)
				{
					ParsingTable::Instruction& ins=transition->instructions[j];
					switch(ins.instructionType)
					{
					case ParsingTable::Instruction::Shift:
						{
							now->shiftStates.Add(ins.stateParameter);
						}
						break;
					case ParsingTable::Instruction::Reduce:
						{
							if(now->shiftStates.Count()==0)
							{
								now->reduceStateCount++;
							}
							else
							{
								now->shiftStates.RemoveAt(now->shiftStates.Count()-1);
							}
						}
						break;
					default:;
					}
				}
			}

			ParsingState::TransitionResult ParsingState::RunTransition(ParsingTable::TransitionItem* transition, regex::RegexToken* regexToken, vint instructionBegin, vint instructionCount, bool lastPart)
			{
				if(regexToken)
				{
					if(!stateGroup->shiftToken)
					{
						stateGroup->shiftToken=regexToken;
						stateGroup->reduceToken=regexToken;
					}
				}
				if(transition->token>=ParsingTable::UserTokenStart)
				{
					if(stateGroup->tokenSequenceIndex==0)
					{
						stateGroup->shiftTokenStack.Add(stateGroup->shiftToken);
					}
					stateGroup->tokenSequenceIndex++;
				}

				TransitionResult result;
				result.tableTokenIndex=transition->token;
				result.token=regexToken;
				result.tokenIndexInStream=regexToken?walker->GetTokenIndexInStream():-1;
				result.tableStateSource=stateGroup->currentState;
				result.tableStateTarget=transition->targetState;
				result.transition=transition;
				result.instructionBegin=instructionBegin;
				result.instructionCount=instructionCount;

				for(vint j=instructionBegin;j<instructionBegin+instructionCount;j++)
				{
					ParsingTable::Instruction& ins=transition->instructions[j];
					switch(ins.instructionType)
					{
					case ParsingTable::Instruction::Shift:
						{
							stateGroup->stateStack.Add(ins.stateParameter);

							stateGroup->shiftTokenStack.Add(stateGroup->shiftToken);
							stateGroup->shiftToken=regexToken;
							stateGroup->reduceToken=regexToken;
						}
						break;
					case ParsingTable::Instruction::Reduce:
						{
							stateGroup->stateStack.RemoveAt(stateGroup->stateStack.Count()-1);

							result.AddShiftReduceRange(stateGroup->shiftToken, stateGroup->reduceToken);
							stateGroup->shiftToken=stateGroup->shiftTokenStack[stateGroup->shiftTokenStack.Count()-1];
							stateGroup->shiftTokenStack.RemoveAt(stateGroup->shiftTokenStack.Count()-1);
						}
						break;
					case ParsingTable::Instruction::LeftRecursiveReduce:
						{
							result.AddShiftReduceRange(stateGroup->shiftToken, stateGroup->reduceToken);
							if(regexToken)
							{
								stateGroup->reduceToken=regexToken;
							}
						}
						break;
					default:;
					}
				}

				if(regexToken)
				{
					stateGroup->reduceToken=regexToken;
				}

				if(transition->token==ParsingTable::TokenFinish && lastPart)
				{
					stateGroup->shiftToken=stateGroup->shiftTokenStack[stateGroup->shiftTokenStack.Count()-1];
					stateGroup->shiftTokenStack.RemoveAt(stateGroup->shiftTokenStack.Count()-1);
					result.AddShiftReduceRange(stateGroup->shiftToken, stateGroup->reduceToken);
				}

				stateGroup->currentState=transition->targetState;
				return result;
			}

			ParsingState::TransitionResult ParsingState::RunTransition(ParsingTable::TransitionItem* transition, regex::RegexToken* regexToken)
			{
				return RunTransition(transition, regexToken, 0, transition->instructions.Count(), true);
			}

			bool ParsingState::ReadTokenInFuture(vint tableTokenIndex, Future* previous, Future* now, const collections::IEnumerable<vint>* lookAheadTokens)
			{
				ParsingTable::TransitionItem* selectedItem=0;
				if(previous)
				{
					selectedItem=MatchTokenInFuture(tableTokenIndex, previous, lookAheadTokens);
				}
				else
				{
					selectedItem=MatchToken(tableTokenIndex, lookAheadTokens);
				}

				if(!selectedItem)
				{
					return false;
				}
				RunTransitionInFuture(selectedItem, previous, now);
				return true;
			}

			ParsingState::TransitionResult ParsingState::ReadToken(vint tableTokenIndex, regex::RegexToken* regexToken, const collections::IEnumerable<vint>* lookAheadTokens)
			{
				ParsingTable::TransitionItem* item=MatchToken(tableTokenIndex, lookAheadTokens);
				if(item)
				{
					return RunTransition(item, regexToken);
				}
				return TransitionResult();
			}

			ParsingState::TransitionResult ParsingState::ReadToken()
			{
				if(walker->GetTableTokenIndex()==-1)
				{
					return TransitionResult();
				}
				vint token=walker->GetTableTokenIndex();
				RegexToken* regexToken=walker->GetRegexToken();

				bool tryReduce=false;
				TransitionResult result=ReadToken(token, regexToken, &walker->GetTokenLookahead());
				if(!result)
				{
					result=ReadToken(ParsingTable::LeftRecursiveReduce, 0, &walker->GetReduceLookahead());
					tryReduce=true;
				}
				if(!result)
				{
					result=ReadToken(ParsingTable::NormalReduce, 0, &walker->GetReduceLookahead());
					tryReduce=true;
				}

				if(result && !tryReduce)
				{
					walker->Move();
				}
				return result;
			}

			bool ParsingState::TestExplore(vint tableTokenIndex, Future* previous)
			{
				Future fakePrevious;
				fakePrevious.currentState=stateGroup->currentState;
				Future* realPrevious=previous?previous:&fakePrevious;

				ParsingTable::TransitionBag* bag=table->GetTransitionBag(realPrevious->currentState, tableTokenIndex).Obj();
				if(bag)
				{
					for(vint i=0;i<bag->transitionItems.Count();i++)
					{
						ParsingTable::TransitionItem* item=bag->transitionItems[i].Obj();
						if(TestTransitionItemInFuture(tableTokenIndex, realPrevious, item, 0))
						{
							return true;
						}
					}
				}
				return false;
			}

			bool ParsingState::Explore(vint tableTokenIndex, Future* previous, collections::List<Future*>& possibilities)
			{
				Future fakePrevious;
				fakePrevious.currentState=stateGroup->currentState;
				Future* realPrevious=previous?previous:&fakePrevious;

				ParsingTable::TransitionBag* bag=table->GetTransitionBag(realPrevious->currentState, tableTokenIndex).Obj();
				bool successful = false;
				if(bag)
				{
					for(vint i=0;i<bag->transitionItems.Count();i++)
					{
						ParsingTable::TransitionItem* item=bag->transitionItems[i].Obj();
						if(TestTransitionItemInFuture(tableTokenIndex, realPrevious, item, 0))
						{
							Future* now=new Future;
							RunTransitionInFuture(item, previous, now);
							possibilities.Add(now);
							successful = true;
						}
					}
				}
				return successful;
			}

			bool ParsingState::ExploreStep(collections::List<Future*>& previousFutures, vint start, vint count, collections::List<Future*>& possibilities)
			{
				if(walker->GetTableTokenIndex()==-1)
				{
					return false;
				}
				vint token = walker->GetTableTokenIndex();
				RegexToken* regexToken = walker->GetRegexToken();
				vint oldPossibilitiesCount = possibilities.Count();
				for (vint i = 0; i<count; i++)
				{
					Future* previous = previousFutures[start + i];
					Explore(token, previous, possibilities);
				}
				if (possibilities.Count() == oldPossibilitiesCount)
				{
					return false;
				}
				for (vint i = oldPossibilitiesCount; i < possibilities.Count(); i++)
				{
					possibilities[i]->selectedRegexToken = regexToken;
				}
				return true;
			}

			bool ParsingState::ExploreNormalReduce(collections::List<Future*>& previousFutures, vint start, vint count, collections::List<Future*>& possibilities)
			{
				if(walker->GetTableTokenIndex()==-1)
				{
					return false;
				}
				vint oldPossibilitiesCount = possibilities.Count();
				for(vint i=0;i<count;i++)
				{
					Future* previous=previousFutures[start+i];
					Explore(ParsingTable::NormalReduce, previous, possibilities);
				}
				return possibilities.Count() > oldPossibilitiesCount;
			}

			bool ParsingState::ExploreLeftRecursiveReduce(collections::List<Future*>& previousFutures, vint start, vint count, collections::List<Future*>& possibilities)
			{
				if(walker->GetTableTokenIndex()==-1)
				{
					return false;
				}
				vint oldPossibilitiesCount = possibilities.Count();
				for(vint i=0;i<count;i++)
				{
					Future* previous=previousFutures[start+i];
					Explore(ParsingTable::LeftRecursiveReduce, previous, possibilities);
				}
				return possibilities.Count() > oldPossibilitiesCount;
			}

			ParsingState::Future* ParsingState::ExploreCreateRootFuture()
			{
				Future* future=new Future;
				future->currentState=stateGroup->currentState;
				return future;
			}

			Ptr<ParsingState::StateGroup> ParsingState::TakeSnapshot()
			{
				return Ptr(new StateGroup(*stateGroup.Obj()));
			}

			void ParsingState::RestoreSnapshot(Ptr<StateGroup> group)
			{
				stateGroup = Ptr(new StateGroup(*group.Obj()));
			}

/***********************************************************************
ParsingTreeBuilder
***********************************************************************/

			ParsingTreeBuilder::ParsingTreeBuilder()
				:processingAmbiguityBranch(false)
				,ambiguityBranchSharedNodeCount(0)
			{
			}

			ParsingTreeBuilder::~ParsingTreeBuilder()
			{
			}

			void ParsingTreeBuilder::Reset()
			{
				createdObject=0;
				operationTarget = Ptr(new ParsingTreeObject());
				nodeStack.Clear();

				processingAmbiguityBranch=false;
				ambiguityBranchCreatedObject=0;
				ambiguityBranchOperationTarget=0;
				ambiguityBranchSharedNodeCount=0;
				ambiguityBranchNodeStack.Clear();
				ambiguityNodes.Clear();
			}

			bool ParsingTreeBuilder::Run(const ParsingState::TransitionResult& result)
			{
				if(!operationTarget)
				{
					return false;
				}

				switch(result.transitionType)
				{
				case ParsingState::TransitionResult::AmbiguityBegin:
					{
						if(processingAmbiguityBranch) return false;
						processingAmbiguityBranch=true;
						if(createdObject)
						{
							ambiguityBranchCreatedObject=createdObject->Clone();
						}
						else
						{
							ambiguityBranchCreatedObject=0;
						}
						ambiguityBranchOperationTarget=operationTarget->Clone().Cast<ParsingTreeObject>();
						ambiguityBranchNodeStack.Clear();
						ambiguityBranchSharedNodeCount=nodeStack.Count()-result.ambiguityAffectedStackNodeCount+1;
						for(vint i=ambiguityBranchSharedNodeCount;i<nodeStack.Count();i++)
						{
							ambiguityBranchNodeStack.Add(nodeStack[i]->Clone().Cast<ParsingTreeObject>());
						}
						ambiguityNodes.Clear();
					}
					break;
				case ParsingState::TransitionResult::AmbiguityBranch:
					{
						if(!processingAmbiguityBranch) return false;
						if(nodeStack.Count()!=ambiguityBranchSharedNodeCount) return false;
						ambiguityNodes.Add(operationTarget);
						if(ambiguityBranchCreatedObject)
						{
							createdObject=ambiguityBranchCreatedObject->Clone();
						}
						else
						{
							createdObject=0;
						}
						operationTarget=ambiguityBranchOperationTarget->Clone().Cast<ParsingTreeObject>();
						for(vint i=0;i<ambiguityBranchNodeStack.Count();i++)
						{
							nodeStack.Add(ambiguityBranchNodeStack[i]->Clone().Cast<ParsingTreeObject>());
						}
					}
					break;
				case ParsingState::TransitionResult::AmbiguityEnd:
					{
						if(!processingAmbiguityBranch) return false;
						if(nodeStack.Count()!=ambiguityBranchSharedNodeCount) return false;
						ambiguityNodes.Add(operationTarget);

						processingAmbiguityBranch=false;
						createdObject=0;
						ambiguityBranchCreatedObject=0;
						ambiguityBranchOperationTarget=0;
						ambiguityBranchSharedNodeCount=0;
						ambiguityBranchNodeStack.Clear();

						{
							auto ambiguousNode = Ptr(new ParsingTreeObject(result.ambiguityNodeType, operationTarget->GetCodeRange()));
							auto items = Ptr(new ParsingTreeArray(L"", operationTarget->GetCodeRange()));
							for (auto node : ambiguityNodes)
							{
								items->AddItem(node);
							}
							ambiguousNode->SetMember(L"items", items);
							operationTarget=ambiguousNode;
						}
						ambiguityNodes.Clear();
					}
					break;
				case ParsingState::TransitionResult::ExecuteInstructions:
					{
						vint shiftReduceRangeIndex=0;
						for(vint j=result.instructionBegin;j<result.instructionBegin+result.instructionCount;j++)
						{
							ParsingTable::Instruction& ins=result.transition->instructions[j];
							switch(ins.instructionType)
							{
							case ParsingTable::Instruction::Create:
								{
									if(operationTarget->GetType()!=L"")
									{
										return false;
									}
									operationTarget->SetType(ins.nameParameter);
									operationTarget->GetCreatorRules().Add(ins.creatorRule);
								}
								break;
							case ParsingTable::Instruction::Using:
								{
									if(operationTarget->GetType()!=L"" || !createdObject)
									{
										return false;
									}
									Ptr<ParsingTreeObject> obj=createdObject.Cast<ParsingTreeObject>();
									if(!obj)
									{
										return false;
									}
									for(vint i=0;i<operationTarget->GetMembers().Count();i++)
									{
										WString name=operationTarget->GetMembers().Keys().Get(i);
										Ptr<ParsingTreeNode> value=operationTarget->GetMembers().Values().Get(i);
										obj->SetMember(name, value);
									}
									operationTarget=obj;
									operationTarget->GetCreatorRules().Add(ins.creatorRule);
									createdObject=0;
								}
								break;
							case ParsingTable::Instruction::Assign:
								{
									if(!createdObject)
									{
										Ptr<ParsingTreeToken> value;
										if(result.token==0)
										{
											value = Ptr(new ParsingTreeToken(L"", result.tokenIndexInStream));
										}
										else
										{
											value = Ptr(new ParsingTreeToken(WString::CopyFrom(result.token->reading, result.token->length), result.tokenIndexInStream));
											value->SetCodeRange(ParsingTextRange(result.token, result.token));
										}
										operationTarget->SetMember(ins.nameParameter, value);
									}
									else
									{
										operationTarget->SetMember(ins.nameParameter, createdObject);
										createdObject=0;
									}
								}
								break;
							case ParsingTable::Instruction::Item:
								{
									auto arr=operationTarget->GetMember(ins.nameParameter).Cast<ParsingTreeArray>();
									if(!arr)
									{
										arr = Ptr(new ParsingTreeArray());
										operationTarget->SetMember(ins.nameParameter, arr);
									}
									ParsingTextRange arrRange=arr->GetCodeRange();
									ParsingTextRange itemRange;
									if(!createdObject)
									{
										Ptr<ParsingTreeToken> value;
										if(result.token==0)
										{
											value = Ptr(new ParsingTreeToken(L"", result.tokenIndexInStream));
										}
										else
										{
											value = Ptr(new ParsingTreeToken(WString::CopyFrom(result.token->reading, result.token->length), result.tokenIndexInStream));
											value->SetCodeRange(ParsingTextRange(result.token, result.token));
											itemRange=value->GetCodeRange();
										}
										arr->AddItem(value);
									}
									else
									{
										arr->AddItem(createdObject);
										itemRange=createdObject->GetCodeRange();
										createdObject=0;
									}

									if(arrRange.start.index==ParsingTextPos::UnknownValue || itemRange.start<arrRange.start)
									{
										arrRange.start=itemRange.start;
									}
									if(arrRange.end.index==ParsingTextPos::UnknownValue || itemRange.end>arrRange.end)
									{
										arrRange.end=itemRange.end;
									}
									arr->SetCodeRange(arrRange);
								}
								break;
							case ParsingTable::Instruction::Setter:
								{
								auto value = Ptr(new ParsingTreeToken(ins.value, -1));
									operationTarget->SetMember(ins.nameParameter, value);
								}
								break;
							case ParsingTable::Instruction::Shift:
								{
									nodeStack.Add(operationTarget);
									operationTarget = Ptr(new ParsingTreeObject());
									createdObject=0;
								}
								break;
							case ParsingTable::Instruction::Reduce:
								{
									if(nodeStack.Count()==0)
									{
										return false;
									}
									createdObject=operationTarget;
									operationTarget=nodeStack[nodeStack.Count()-1];
									nodeStack.RemoveAt(nodeStack.Count()-1);

									if(result.shiftReduceRanges)
									{
										ParsingState::ShiftReduceRange tokenRange=result.shiftReduceRanges->Get(shiftReduceRangeIndex++);
										if(tokenRange.shiftToken && tokenRange.reduceToken)
										{
											ParsingTextRange codeRange(tokenRange.shiftToken, tokenRange.reduceToken);
											createdObject->SetCodeRange(codeRange);
										}
									}
								}
								break;
							case ParsingTable::Instruction::LeftRecursiveReduce:
								{
									createdObject=operationTarget;
									operationTarget = Ptr(new ParsingTreeObject());

									if(result.shiftReduceRanges)
									{
										ParsingState::ShiftReduceRange tokenRange=result.shiftReduceRanges->Get(shiftReduceRangeIndex++);
										if(tokenRange.shiftToken && tokenRange.reduceToken)
										{
											ParsingTextRange codeRange(tokenRange.shiftToken, tokenRange.reduceToken);
											createdObject->SetCodeRange(codeRange);
										}
									}
								}
								break;
							default:
								return false;
							}
						}

						if(result.tableTokenIndex==ParsingTable::TokenFinish && !processingAmbiguityBranch)
						{
							if(result.shiftReduceRanges)
							{
								ParsingState::ShiftReduceRange tokenRange=result.shiftReduceRanges->Get(shiftReduceRangeIndex++);
								if(tokenRange.shiftToken && tokenRange.reduceToken)
								{
									ParsingTextRange codeRange(tokenRange.shiftToken, tokenRange.reduceToken);
									operationTarget->SetCodeRange(codeRange);
								}
							}
						}
					}
					break;
				default:
					return false;
				}
				
				return true;
			}

			bool ParsingTreeBuilder::GetProcessingAmbiguityBranch()
			{
				return processingAmbiguityBranch;
			}

			Ptr<ParsingTreeObject> ParsingTreeBuilder::GetNode()const
			{
				if(nodeStack.Count()==0)
				{
					return operationTarget;
				}
				else
				{
					return 0;
				}
			}

/***********************************************************************
ParsingTransitionCollector
***********************************************************************/

			ParsingTransitionCollector::ParsingTransitionCollector()
				:ambiguityBegin(-1)
			{
			}

			ParsingTransitionCollector::~ParsingTransitionCollector()
			{
			}

			void ParsingTransitionCollector::Reset()
			{
				ambiguityBegin=-1;
				transitions.Clear();
				ambiguityBeginToEnds.Clear();
				ambiguityBeginToBranches.Clear();
				ambiguityBranchToBegins.Clear();
			}

			bool ParsingTransitionCollector::Run(const ParsingState::TransitionResult& result)
			{
				vint index=transitions.Count();
				switch(result.transitionType)
				{
				case ParsingState::TransitionResult::AmbiguityBegin:
					if(ambiguityBegin!=-1) return false;
					ambiguityBegin=index;
					break;
				case ParsingState::TransitionResult::AmbiguityBranch:
					{
						if(ambiguityBegin==-1) return false;
						ambiguityBeginToBranches.Add(ambiguityBegin, index);
						ambiguityBranchToBegins.Add(index, ambiguityBegin);
					}
					break;
				case ParsingState::TransitionResult::AmbiguityEnd:
					{
						if(ambiguityBegin==-1) return false;
						ambiguityBeginToEnds.Add(ambiguityBegin, index);
						ambiguityBegin=-1;
					}
					break;
				case ParsingState::TransitionResult::ExecuteInstructions:
					break;
				default:
					return false;
				}

				transitions.Add(result);
				return true;
			}

			bool ParsingTransitionCollector::GetProcessingAmbiguityBranch()
			{
				return ambiguityBegin!=-1;
			}

			const ParsingTransitionCollector::TransitionResultList& ParsingTransitionCollector::GetTransitions()const
			{
				return transitions;
			}

			vint ParsingTransitionCollector::GetAmbiguityEndFromBegin(vint transitionIndex)const
			{
				vint index=ambiguityBeginToEnds.Keys().IndexOf(transitionIndex);
				return index==-1?-1:ambiguityBeginToEnds.Values()[index];
			}

			const collections::List<vint>& ParsingTransitionCollector::GetAmbiguityBranchesFromBegin(vint transitionIndex)const
			{
				vint index=ambiguityBeginToBranches.Keys().IndexOf(transitionIndex);
				return index==-1?*(collections::List<vint>*)0:ambiguityBeginToBranches.GetByIndex(index);
			}

			vint ParsingTransitionCollector::GetAmbiguityBeginFromBranch(vint transitionIndex)const
			{
				vint index=ambiguityBranchToBegins.Keys().IndexOf(transitionIndex);
				return index==-1?-1:ambiguityBranchToBegins.Values()[index];
			}
		}
	}
}

#if defined(VCZH_GCC) && defined(__clang__)
#pragma clang diagnostic pop
#endif


/***********************************************************************
.\PARSINGTABLE.CPP
***********************************************************************/
/***********************************************************************
Author: Zihan Chen (vczh)
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	namespace stream
	{
		namespace internal
		{
			using namespace vl::parsing::tabling;

/***********************************************************************
ParsingTable (Serialization)
***********************************************************************/

			BEGIN_SERIALIZATION(ParsingTable::AttributeInfo)
				SERIALIZE(name)
				SERIALIZE(arguments)
			END_SERIALIZATION

			BEGIN_SERIALIZATION(ParsingTable::AttributeInfoList)
				SERIALIZE(attributes)
			END_SERIALIZATION

			BEGIN_SERIALIZATION(ParsingTable::TreeTypeInfo)
				SERIALIZE(type)
				SERIALIZE(attributeIndex)
			END_SERIALIZATION

			BEGIN_SERIALIZATION(ParsingTable::TreeFieldInfo)
				SERIALIZE(type)
				SERIALIZE(field)
				SERIALIZE(attributeIndex)
			END_SERIALIZATION

			BEGIN_SERIALIZATION(ParsingTable::TokenInfo)
				SERIALIZE(name)
				SERIALIZE(regex)
				SERIALIZE(regexTokenIndex)
				SERIALIZE(attributeIndex)
			END_SERIALIZATION

			BEGIN_SERIALIZATION(ParsingTable::StateInfo)
				SERIALIZE(ruleName)
				SERIALIZE(stateName)
				SERIALIZE(stateExpression)
			END_SERIALIZATION

			BEGIN_SERIALIZATION(ParsingTable::RuleInfo)
				SERIALIZE(name)
				SERIALIZE(type)
				SERIALIZE(ambiguousType)
				SERIALIZE(rootStartState)
				SERIALIZE(attributeIndex)
			END_SERIALIZATION

			BEGIN_SERIALIZATION(ParsingTable::Instruction)
				SERIALIZE(instructionType)
				SERIALIZE(stateParameter)
				SERIALIZE(nameParameter)
				SERIALIZE(value)
				SERIALIZE(creatorRule)
			END_SERIALIZATION

			BEGIN_SERIALIZATION(ParsingTable::LookAheadInfo)
				SERIALIZE(tokens)
				SERIALIZE(state)
			END_SERIALIZATION

			BEGIN_SERIALIZATION(ParsingTable::TransitionItem)
				SERIALIZE(token)
				SERIALIZE(targetState)
				SERIALIZE(lookAheads)
				SERIALIZE(stackPattern)
				SERIALIZE(instructions)
			END_SERIALIZATION

			BEGIN_SERIALIZATION(ParsingTable::TransitionBag)
				SERIALIZE(transitionItems)
			END_SERIALIZATION
		}
	}

	namespace parsing
	{
		namespace tabling
		{
			using namespace collections;
			using namespace regex;

#ifdef VCZH_GCC
			const vint ParsingTable::TokenBegin;
			const vint ParsingTable::TokenFinish;
			const vint ParsingTable::NormalReduce;
			const vint ParsingTable::LeftRecursiveReduce;
			const vint ParsingTable::UserTokenStart;
#endif

/***********************************************************************
ParsingTable::AttributeInfoList
***********************************************************************/

			Ptr<ParsingTable::AttributeInfo> ParsingTable::AttributeInfoList::FindFirst(const WString& name)
			{
				for(vint i=0;i<attributes.Count();i++)
				{
					if(attributes[i]->name==name)
					{
						return attributes[i];
					}
				}
				return 0;
			}

/***********************************************************************
ParsingTable::LookAheadInfo
***********************************************************************/

			ParsingTable::LookAheadInfo::PrefixResult ParsingTable::LookAheadInfo::TestPrefix(Ptr<LookAheadInfo> a, Ptr<LookAheadInfo> b)
			{
				if(a->tokens.Count()>b->tokens.Count())
				{
					return ParsingTable::LookAheadInfo::NotPrefix;
				}
				for(vint i=0;i<a->tokens.Count();i++)
				{
					if(a->tokens[i]!=b->tokens[i])
					{
						return ParsingTable::LookAheadInfo::NotPrefix;
					}
				}
				return a->tokens.Count()<b->tokens.Count()?ParsingTable::LookAheadInfo::Prefix:ParsingTable::LookAheadInfo::Equal;
			}

			void ParsingTable::LookAheadInfo::WalkInternal(Ptr<ParsingTable> table, Ptr<LookAheadInfo> previous, vint state, collections::SortedList<vint>& walkedStates, collections::List<Ptr<LookAheadInfo>>& newInfos)
			{
				if (walkedStates.Contains(state)) return;
				walkedStates.Add(state);

				for (vint i = 0; i < table->GetTokenCount(); i++)
				{
					if(Ptr<TransitionBag> bag=table->GetTransitionBag(state, i))
					{
						for (auto item : bag->transitionItems)
						{
							if (i == ParsingTable::NormalReduce || i == ParsingTable::LeftRecursiveReduce)
							{
								WalkInternal(table, previous, item->targetState, walkedStates, newInfos);
							}
							else
							{
								auto info = Ptr(new LookAheadInfo);
								info->state=item->targetState;
								if(previous)
								{
									CopyFrom(info->tokens, previous->tokens);
								}
								info->tokens.Add(i);
								newInfos.Add(info);
							}
						}
					}
				}

				walkedStates.Remove(state);
			}

			void ParsingTable::LookAheadInfo::Walk(Ptr<ParsingTable> table, Ptr<LookAheadInfo> previous, vint state, collections::List<Ptr<LookAheadInfo>>& newInfos)
			{
				SortedList<vint> walkedStates;
				WalkInternal(table, previous, state, walkedStates, newInfos);
			}

/***********************************************************************
ParsingTable::TransitionItem
***********************************************************************/

			enum TransitionLevel
			{
				ReduceTransition,
				LeftRecursiveReduceTransition,
				NormalTransition,
			};

			TransitionLevel GetTransitionLevel(Ptr<ParsingTable::TransitionItem> t)
			{
				bool hasReduce=false;
				bool hasLrReduce=false;
				for (auto ins : t->instructions)
				{
					switch(ins.instructionType)
					{
					case ParsingTable::Instruction::Reduce:
						hasReduce=true;
						break;
					case ParsingTable::Instruction::LeftRecursiveReduce:
						hasLrReduce=true;
						break;
					default:;
					}
				}

				return
					hasLrReduce?LeftRecursiveReduceTransition:
					hasReduce?ReduceTransition:
					NormalTransition;
			}

			ParsingTable::TransitionItem::OrderResult ParsingTable::TransitionItem::CheckOrder(Ptr<TransitionItem> t1, Ptr<TransitionItem> t2, OrderResult defaultResult)
			{
				if(t1->token!=t2->token) return UnknownOrder;
				if (defaultResult != UnknownOrder)
				{
					TransitionLevel level1 = GetTransitionLevel(t1);
					TransitionLevel level2 = GetTransitionLevel(t2);
					if (level1 > level2) return CorrectOrder;
					if (level1 < level2) return WrongOrder;
				}

				vint ic1=t1->stackPattern.Count();
				vint ic2=t2->stackPattern.Count();
				vint ic=ic1<ic2?ic1:ic2;

				for(vint i=0;i<ic;i++)
				{
					vint s1=t1->stackPattern[i];
					vint s2=t2->stackPattern[i];

					if(s1>s2)
					{
						return CorrectOrder;
					}
					else if(s1<s2)
					{
						return WrongOrder;
					}
				}

				if(t1->token==TokenFinish)
				{
					if(ic1>ic2)
					{
						return CorrectOrder;
					}
					else if(ic1<ic2)
					{
						return WrongOrder;
					}
				}
				return defaultResult;
			}

			vint ParsingTable::TransitionItem::Compare(Ptr<TransitionItem> t1, Ptr<TransitionItem> t2, OrderResult defaultResult)
			{
				OrderResult order=CheckOrder(t1, t2, defaultResult);
				switch(order)
				{
				case CorrectOrder:	return -1;
				case WrongOrder:	return 1;
				default:			return 0;
				}
			}

			template<typename TIO>
			void ParsingTable::IO(TIO& io)
			{
				io
					<< ambiguity
					<< attributeInfos
					<< treeTypeInfos
					<< treeFieldInfos
					<< tokenCount
					<< stateCount
					<< tokenInfos
					<< discardTokenInfos
					<< stateInfos
					<< ruleInfos
					<< transitionBags
					;
			}

			ParsingTable::ParsingTable(stream::IStream& input)
			{
				stream::internal::ContextFreeReader reader(input);
				IO(reader);
			}

			void ParsingTable::Serialize(stream::IStream& output)
			{
				stream::internal::ContextFreeWriter writer(output);
				IO(writer);
			}

/***********************************************************************
ParsingTable
***********************************************************************/

#if defined(VCZH_GCC) && defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wnull-dereference"
#endif

			ParsingTable::ParsingTable(vint _attributeInfoCount, vint _treeTypeInfoCount, vint _treeFieldInfoCount, vint _tokenCount, vint discardTokenCount, vint _stateCount, vint _ruleCount)
				:ambiguity(false)
				,tokenCount(_tokenCount+UserTokenStart)
				,stateCount(_stateCount)
				,attributeInfos(_attributeInfoCount)
				,treeTypeInfos(_treeTypeInfoCount)
				,treeFieldInfos(_treeFieldInfoCount)
				,tokenInfos(_tokenCount+UserTokenStart)
				,discardTokenInfos(discardTokenCount)
				,stateInfos(_stateCount)
				,ruleInfos(_ruleCount)
				,transitionBags((_tokenCount+UserTokenStart)*_stateCount)
			{
			}

			ParsingTable::~ParsingTable()
			{
			}

			bool ParsingTable::GetAmbiguity()
			{
				return ambiguity;
			}

			void ParsingTable::SetAmbiguity(bool value)
			{
				ambiguity=value;
			}

			vint ParsingTable::GetAttributeInfoCount()
			{
				return attributeInfos.Count();
			}

			Ptr<ParsingTable::AttributeInfoList> ParsingTable::GetAttributeInfo(vint index)
			{
				return attributeInfos[index];
			}

			void ParsingTable::SetAttributeInfo(vint index, Ptr<AttributeInfoList> info)
			{
				attributeInfos[index]=info;
			}

			vint ParsingTable::GetTreeTypeInfoCount()
			{
				return treeTypeInfos.Count();
			}

			const ParsingTable::TreeTypeInfo& ParsingTable::GetTreeTypeInfo(vint index)
			{
				return treeTypeInfos[index];
			}

			const ParsingTable::TreeTypeInfo& ParsingTable::GetTreeTypeInfo(const WString& type)
			{
				vint index=treeTypeInfoMap.Keys().IndexOf(type);
				if(index==-1) return *(const TreeTypeInfo*)0;
				return treeTypeInfos[treeTypeInfoMap.Values().Get(index)];
			}

			void ParsingTable::SetTreeTypeInfo(vint index, const TreeTypeInfo& info)
			{
				treeTypeInfos[index]=info;
			}

			vint ParsingTable::GetTreeFieldInfoCount()
			{
				return treeFieldInfos.Count();
			}

			const ParsingTable::TreeFieldInfo& ParsingTable::GetTreeFieldInfo(vint index)
			{
				return treeFieldInfos[index];
			}

			const ParsingTable::TreeFieldInfo& ParsingTable::GetTreeFieldInfo(const WString& type, const WString& field)
			{
				Pair<WString, WString> key(type, field);
				vint index=treeFieldInfoMap.Keys().IndexOf(key);
				if(index==-1) return *(const TreeFieldInfo*)0;
				return treeFieldInfos[treeFieldInfoMap.Values().Get(index)];
			}

			void ParsingTable::SetTreeFieldInfo(vint index, const TreeFieldInfo& info)
			{
				treeFieldInfos[index]=info;
			}

			vint ParsingTable::GetTokenCount()
			{
				return tokenCount;
			}

			const ParsingTable::TokenInfo& ParsingTable::GetTokenInfo(vint token)
			{
				return tokenInfos[token];
			}

			void ParsingTable::SetTokenInfo(vint token, const TokenInfo& info)
			{
				tokenInfos[token]=info;
			}

			vint ParsingTable::GetDiscardTokenCount()
			{
				return discardTokenInfos.Count();
			}

			const ParsingTable::TokenInfo& ParsingTable::GetDiscardTokenInfo(vint token)
			{
				return discardTokenInfos[token];
			}

			void ParsingTable::SetDiscardTokenInfo(vint token, const TokenInfo& info)
			{
				discardTokenInfos[token]=info;
			}

			vint ParsingTable::GetStateCount()
			{
				return stateCount;
			}

			const ParsingTable::StateInfo& ParsingTable::GetStateInfo(vint state)
			{
				return stateInfos[state];
			}

			void ParsingTable::SetStateInfo(vint state, const StateInfo& info)
			{
				stateInfos[state]=info;
			}

			vint ParsingTable::GetRuleCount()
			{
				return ruleInfos.Count();
			}

			const ParsingTable::RuleInfo& ParsingTable::GetRuleInfo(const WString& ruleName)
			{
				vint index=ruleMap.Keys().IndexOf(ruleName);
				if(index==-1) return *(const RuleInfo*)0;
				return ruleInfos[ruleMap.Values().Get(index)];
			}

			const ParsingTable::RuleInfo& ParsingTable::GetRuleInfo(vint rule)
			{
				return ruleInfos[rule];
			}

			void ParsingTable::SetRuleInfo(vint rule, const RuleInfo& info)
			{
				ruleInfos[rule]=info;
			}

			const regex::RegexLexer& ParsingTable::GetLexer()
			{
				return *lexer.Obj();
			}

			Ptr<ParsingTable::TransitionBag> ParsingTable::GetTransitionBag(vint state, vint token)
			{
				return transitionBags[state*tokenCount+token];
			}

			void ParsingTable::SetTransitionBag(vint state, vint token, Ptr<TransitionBag> bag)
			{
				transitionBags[state*tokenCount+token]=bag;
			}

			void ParsingTable::Initialize()
			{
				List<WString> tokens;
				for (auto info : From(tokenInfos).Skip(UserTokenStart))
				{
					tokens.Add(info.regex);
				}
				for (auto info : discardTokenInfos)
				{
					tokens.Add(info.regex);
				}

				vint regexTokenIndex = 0;
				for (vint i = UserTokenStart; i < tokenInfos.Count(); i++)
				{
					tokenInfos[i].regexTokenIndex = regexTokenIndex++;
				}
				for (vint i = 0; i < discardTokenInfos.Count(); i++)
				{
					discardTokenInfos[i].regexTokenIndex = regexTokenIndex++;
				}
				lexer = Ptr(new RegexLexer(tokens));

				ruleMap.Clear();
				for (auto [rule, index] : indexed(ruleInfos))
				{
					ruleMap.Add(rule.name, index);
				}
				for (vint i = 0; i < stateInfos.Count(); i++)
				{
					StateInfo& info = stateInfos[i];
					info.ruleAmbiguousType = ruleInfos[ruleMap[info.ruleName]].ambiguousType;
				}

				treeTypeInfoMap.Clear();
				for (auto [info, index] : indexed(treeTypeInfos))
				{
					treeTypeInfoMap.Add(info.type, index);
				}

				treeFieldInfoMap.Clear();
				for (auto [info, index] : indexed(treeFieldInfos))
				{
					Pair<WString, WString> key(info.type, info.field);
					treeFieldInfoMap.Add(key, index);
				}
			}

			bool ParsingTable::IsInputToken(vint regexTokenIndex)
			{
				return regexTokenIndex>=0 && regexTokenIndex<tokenCount-UserTokenStart;
			}

			vint ParsingTable::GetTableTokenIndex(vint regexTokenIndex)
			{
				return IsInputToken(regexTokenIndex)?regexTokenIndex+UserTokenStart:-1;
			}

			vint ParsingTable::GetTableDiscardTokenIndex(vint regexTokenIndex)
			{
				return regexTokenIndex>=tokenCount-UserTokenStart?regexTokenIndex-(tokenCount-UserTokenStart):-1;
			}

#if defined(VCZH_GCC) && defined(__clang__)
#pragma clang diagnostic pop
#endif
		}
	}
}


/***********************************************************************
.\PARSINGTREE.CPP
***********************************************************************/
/***********************************************************************
Author: Zihan Chen (vczh)
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


#if defined(VCZH_GCC) && defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wnull-dereference"
#endif

namespace vl
{
	using namespace collections;

	namespace parsing
	{

/***********************************************************************
ParsingTreeNode::TraversalVisitor
***********************************************************************/

		ParsingTreeNode::TraversalVisitor::TraversalVisitor(TraverseDirection _direction)
			:direction(_direction)
		{
		}

		void ParsingTreeNode::TraversalVisitor::BeforeVisit(ParsingTreeToken* node)
		{
		}

		void ParsingTreeNode::TraversalVisitor::AfterVisit(ParsingTreeToken* node)
		{
		}

		void ParsingTreeNode::TraversalVisitor::BeforeVisit(ParsingTreeObject* node)
		{
		}

		void ParsingTreeNode::TraversalVisitor::AfterVisit(ParsingTreeObject* node)
		{
		}

		void ParsingTreeNode::TraversalVisitor::BeforeVisit(ParsingTreeArray* node)
		{
		}

		void ParsingTreeNode::TraversalVisitor::AfterVisit(ParsingTreeArray* node)
		{
		}

		void ParsingTreeNode::TraversalVisitor::Visit(ParsingTreeToken* node)
		{
			BeforeVisit(node);
			AfterVisit(node);
		}

		void ParsingTreeNode::TraversalVisitor::Visit(ParsingTreeObject* node)
		{
			BeforeVisit(node);
			switch(direction)
			{
			case TraverseDirection::ByTextPosition:
				{
					for (auto node : node->GetSubNodes())
					{
						node->Accept(this);
					}
				}
				break;
			case TraverseDirection::ByStorePosition:
				{
					for (auto node : node->GetMembers().Values())
					{
						node->Accept(this);
					}
				}
				break;
			}
			AfterVisit(node);
		}

		void ParsingTreeNode::TraversalVisitor::Visit(ParsingTreeArray* node)
		{
			BeforeVisit(node);
			switch(direction)
			{
			case TraverseDirection::ByTextPosition:
				{
					for (auto node : node->GetSubNodes())
					{
						node->Accept(this);
					}
				}
				break;
			case TraverseDirection::ByStorePosition:
				{
					for (auto node : node->GetItems())
					{
						node->Accept(this);
					}
				}
				break;
			}
			AfterVisit(node);
		}

/***********************************************************************
ParsingTreeNode
***********************************************************************/

		bool ParsingTreeNode::BeforeAddChild(Ptr<ParsingTreeNode> node)
		{
			return node->parent==0;
		}

		void ParsingTreeNode::AfterAddChild(Ptr<ParsingTreeNode> node)
		{
			node->parent=this;
			ClearQueryCache();
		}

		bool ParsingTreeNode::BeforeRemoveChild(Ptr<ParsingTreeNode> node)
		{
			return node->parent!=0;
		}

		void ParsingTreeNode::AfterRemoveChild(Ptr<ParsingTreeNode> node)
		{
			node->parent=0;
			ClearQueryCache();
		}

		ParsingTreeNode::ParsingTreeNode(const ParsingTextRange& _codeRange)
			:codeRange(_codeRange)
			,parent(0)
		{
		}

		ParsingTreeNode::~ParsingTreeNode()
		{
		}

		ParsingTextRange ParsingTreeNode::GetCodeRange()
		{
			return codeRange;
		}

		void ParsingTreeNode::SetCodeRange(const ParsingTextRange& range)
		{
			codeRange=range;
		}

		void ParsingTreeNode::InitializeQueryCache()
		{
			const NodeList& subNodes=GetSubNodesInternal();
			ClearQueryCache();
			auto subNodesExists = &subNodes;
			if(subNodesExists)
			{
				for (auto node : subNodes)
				{
					node->InitializeQueryCache();
				}

				//if (codeRange.start.IsInvalid() || codeRange.start.IsInvalid())
				{
					for (auto subNode : subNodes)
					{
						const auto& subRange = subNode->codeRange;
						const auto& min = !subRange.start.IsInvalid() ? subRange.start : subRange.end;
						const auto& max = !subRange.end.IsInvalid() ? subRange.end : subRange.start;

						if (codeRange.start.IsInvalid() || (!min.IsInvalid() && codeRange.start > min))
						{
							codeRange.start = min;
						}
						if (codeRange.end.IsInvalid() || (!max.IsInvalid() && codeRange.end < max))
						{
							codeRange.end = max;
						}
					}
				}

				CopyFrom(
					cachedOrderedSubNodes,
					From(subNodes)
						.Where([=](auto&& node)
						{
							const auto& range = node->GetCodeRange();
							return !range.start.IsInvalid() && !range.end.IsInvalid();
						})
						.OrderByKey([](auto&& node) { return node->GetCodeRange().start; })
					);
			}
		}

		void ParsingTreeNode::ClearQueryCache()
		{
			cachedOrderedSubNodes.Clear();
		}

		ParsingTreeNode* ParsingTreeNode::GetParent()
		{
			return parent;
		}

		const ParsingTreeNode::NodeList& ParsingTreeNode::GetSubNodes()
		{
			return cachedOrderedSubNodes;
		}

		ParsingTreeNode* ParsingTreeNode::FindSubNode(const ParsingTextPos& position)
		{
			return FindSubNode(ParsingTextRange(position, position));
		}

		ParsingTreeNode* ParsingTreeNode::FindSubNode(const ParsingTextRange& range)
		{
			if (codeRange.start <= range.start && range.end <= codeRange.end)
			{
				vint start = 0;
				vint end = cachedOrderedSubNodes.Count() - 1;
				while (start <= end)
				{
					vint selected = (start + end) / 2;
					ParsingTreeNode* selectedNode = cachedOrderedSubNodes[selected].Obj();
					const ParsingTextRange& selectedRange = selectedNode->codeRange;
					if (range.end<selectedRange.start)
					{
						end = selected - 1;
					}
					else if (range.start>selectedRange.end)
					{
						start = selected + 1;
					}
					else if (selectedRange.start <= range.start && range.end <= selectedRange.end)
					{
						return selectedNode;
					}
					else
					{
						return this;
					}
				}
			}
			return this;
		}

		ParsingTreeNode* ParsingTreeNode::FindDeepestNode(const ParsingTextPos& position)
		{
			return FindDeepestNode(ParsingTextRange(position, position));
		}

		ParsingTreeNode* ParsingTreeNode::FindDeepestNode(const ParsingTextRange& range)
		{
			ParsingTreeNode* result=0;
			ParsingTreeNode* node=this;
			do
			{
				result=node;
				node=node->FindSubNode(range);
			}while(result!=node);
			return result;
		}

/***********************************************************************
ParsingTreeToken
***********************************************************************/

		const ParsingTreeToken::NodeList& ParsingTreeToken::GetSubNodesInternal()
		{
			return *(NodeList*)0;
		}

		ParsingTreeToken::ParsingTreeToken(const WString& _value, vint _tokenIndex, const ParsingTextRange& _codeRange)
			:ParsingTreeNode(_codeRange)
			,value(_value)
			,tokenIndex(_tokenIndex)
		{
		}

		ParsingTreeToken::~ParsingTreeToken()
		{
		}

		void ParsingTreeToken::Accept(IVisitor* visitor)
		{
			visitor->Visit(this);
		}

		Ptr<ParsingTreeNode> ParsingTreeToken::Clone()
		{
			auto clone = Ptr(new ParsingTreeToken(value, tokenIndex, codeRange));
			return clone;
		}

		vint ParsingTreeToken::GetTokenIndex()
		{
			return tokenIndex;
		}

		void ParsingTreeToken::SetTokenIndex(vint _tokenIndex)
		{
			tokenIndex=_tokenIndex;
		}

		const WString& ParsingTreeToken::GetValue()
		{
			return value;
		}

		void ParsingTreeToken::SetValue(const WString& _value)
		{
			value=_value;
		}

/***********************************************************************
ParsingTreeObject
***********************************************************************/

		const ParsingTreeObject::NodeList& ParsingTreeObject::GetSubNodesInternal()
		{
			return members.Values();
		}

		ParsingTreeObject::ParsingTreeObject(const WString& _type, const ParsingTextRange& _codeRange)
			:ParsingTreeNode(_codeRange)
			,type(_type)
		{
		}

		ParsingTreeObject::~ParsingTreeObject()
		{
		}

		void ParsingTreeObject::Accept(IVisitor* visitor)
		{
			visitor->Visit(this);
		}

		Ptr<ParsingTreeNode> ParsingTreeObject::Clone()
		{
			auto clone = Ptr(new ParsingTreeObject(type, codeRange));
			CopyFrom(clone->rules, rules);
			for(vint i=0;i<members.Count();i++)
			{
				WString name=members.Keys().Get(i);
				Ptr<ParsingTreeNode> node=members.Values().Get(i)->Clone();
				clone->SetMember(name, node);
			}
			return clone;
		}

		const WString& ParsingTreeObject::GetType()
		{
			return type;
		}

		void ParsingTreeObject::SetType(const WString& _type)
		{
			type=_type;
		}

		ParsingTreeObject::NodeMap& ParsingTreeObject::GetMembers()
		{
			return members;
		}

		Ptr<ParsingTreeNode> ParsingTreeObject::GetMember(const WString& name)
		{
			vint index=members.Keys().IndexOf(name);
			if(index==-1) return 0;
			return members.Values().Get(index);
		}

		bool ParsingTreeObject::SetMember(const WString& name, Ptr<ParsingTreeNode> node)
		{
			vint index=members.Keys().IndexOf(name);
			if(index!=-1)
			{
				Ptr<ParsingTreeNode> previous=members.Values().Get(index);
				if(previous==node) return true;
				if(!BeforeRemoveChild(previous) || !BeforeAddChild(node)) return false;
				members.Remove(name);
				AfterRemoveChild(previous);
			}
			members.Add(name, node);
			AfterAddChild(node);
			return true;
		}

		bool ParsingTreeObject::RemoveMember(const WString& name)
		{
			vint index=members.Keys().IndexOf(name);
			if(index!=-1)
			{
				Ptr<ParsingTreeNode> previous=members.Values().Get(index);
				if(BeforeRemoveChild(previous))
				{
					members.Remove(name);
					AfterRemoveChild(previous);
					return true;
				}
			}
			return false;
		}

		const ParsingTreeObject::NameList& ParsingTreeObject::GetMemberNames()
		{
			return members.Keys();
		}

		ParsingTreeObject::RuleList& ParsingTreeObject::GetCreatorRules()
		{
			return rules;
		}

/***********************************************************************
ParsingTreeArray
***********************************************************************/

		const ParsingTreeArray::NodeList& ParsingTreeArray::GetSubNodesInternal()
		{
			return items;
		}

		ParsingTreeArray::ParsingTreeArray(const WString& _elementType, const ParsingTextRange& _codeRange)
			:ParsingTreeNode(_codeRange)
			,elementType(_elementType)
		{
		}

		ParsingTreeArray::~ParsingTreeArray()
		{
		}

		void ParsingTreeArray::Accept(IVisitor* visitor)
		{
			visitor->Visit(this);
		}

		Ptr<ParsingTreeNode> ParsingTreeArray::Clone()
		{
			auto clone = Ptr(new ParsingTreeArray(elementType, codeRange));
			for(vint i=0;i<items.Count();i++)
			{
				Ptr<ParsingTreeNode> node=items.Get(i)->Clone();
				clone->AddItem(node);
			}
			return clone;
		}

		const WString& ParsingTreeArray::GetElementType()
		{
			return elementType;
		}

		void ParsingTreeArray::SetElementType(const WString& _elementType)
		{
			elementType=_elementType;
		}

		ParsingTreeArray::NodeArray& ParsingTreeArray::GetItems()
		{
			return items;
		}

		Ptr<ParsingTreeNode> ParsingTreeArray::GetItem(vint index)
		{
			if(0<=index && index<items.Count())
			{
				return items[index];
			}
			else
			{
				return 0;
			}
		}

		bool ParsingTreeArray::SetItem(vint index, Ptr<ParsingTreeNode> node)
		{
			if(0<=index && index<items.Count())
			{
				items[index]=node;
				return true;
			}
			else
			{
				return false;
			}
		}

		bool ParsingTreeArray::AddItem(Ptr<ParsingTreeNode> node)
		{
			return InsertItem(items.Count(), node);
		}

		bool ParsingTreeArray::InsertItem(vint index, Ptr<ParsingTreeNode> node)
		{
			if(0<=index && index<=items.Count())
			{
				if(BeforeAddChild(node))
				{
					items.Insert(index, node);
					AfterAddChild(node);
					return true;
				}
			}
			return false;
		}

		bool ParsingTreeArray::RemoveItem(vint index)
		{
			if(0<=index && index<items.Count())
			{
				Ptr<ParsingTreeNode> previous=items[index];
				if(BeforeRemoveChild(previous))
				{
					items.RemoveAt(index);
					AfterRemoveChild(previous);
					return true;
				}
			}
			return false;
		}

		bool ParsingTreeArray::RemoveItem(ParsingTreeNode* node)
		{
			return RemoveItem(items.IndexOf(node));
		}

		vint ParsingTreeArray::IndexOfItem(ParsingTreeNode* node)
		{
			return items.IndexOf(node);
		}

		bool ParsingTreeArray::ContainsItem(ParsingTreeNode* node)
		{
			return items.Contains(node);
		}

		vint ParsingTreeArray::Count()
		{
			return items.Count();
		}

		bool ParsingTreeArray::Clear()
		{
			for (auto node : items)
			{
				if(!BeforeRemoveChild(node)) return false;
			}
			for (auto node : items)
			{
				AfterRemoveChild(node);
			}
			items.Clear();
			return true;
		}

/***********************************************************************
ParsingError
***********************************************************************/

		ParsingError::ParsingError()
			:token(0)
			,parsingTree(0)
		{
		}

		ParsingError::ParsingError(const WString& _errorMessage)
			:token(0)
			,parsingTree(0)
			,errorMessage(_errorMessage)
		{
		}

		ParsingError::ParsingError(const regex::RegexToken* _token, const WString& _errorMessage)
			:token(_token)
			,parsingTree(0)
			,errorMessage(_errorMessage)
		{
			if(token)
			{
				codeRange.start.row=_token->rowStart;
				codeRange.start.column=_token->columnStart;
				codeRange.start.index=_token->start;
				codeRange.end.row=_token->rowEnd;
				codeRange.end.column=_token->columnEnd;
				codeRange.end.index=_token->start+_token->length-1;
				codeRange.codeIndex = _token->codeIndex;
			}
		}

		ParsingError::ParsingError(ParsingTreeCustomBase* _parsingTree, const WString& _errorMessage)
			:codeRange(_parsingTree->codeRange)
			,token(0)
			,parsingTree(_parsingTree)
			,errorMessage(_errorMessage)
		{
		}

		ParsingError::~ParsingError()
		{
		}

/***********************************************************************
ParsingEmptyPrintNodeRecorder
***********************************************************************/

		ParsingEmptyPrintNodeRecorder::ParsingEmptyPrintNodeRecorder()
		{
		}

		ParsingEmptyPrintNodeRecorder::~ParsingEmptyPrintNodeRecorder()
		{
		}

		void ParsingEmptyPrintNodeRecorder::Record(ParsingTreeCustomBase* node, const ParsingTextRange& range)
		{
		}

/***********************************************************************
ParsingMultiplePrintNodeRecorder
***********************************************************************/

		ParsingMultiplePrintNodeRecorder::ParsingMultiplePrintNodeRecorder()
		{
		}

		ParsingMultiplePrintNodeRecorder::~ParsingMultiplePrintNodeRecorder()
		{
		}

		void ParsingMultiplePrintNodeRecorder::AddRecorder(Ptr<IParsingPrintNodeRecorder> recorder)
		{
			recorders.Add(recorder);
		}

		void ParsingMultiplePrintNodeRecorder::Record(ParsingTreeCustomBase* node, const ParsingTextRange& range)
		{
			for (auto recorder : recorders)
			{
				recorder->Record(node, range);
			}
		}

/***********************************************************************
ParsingOriginalLocationRecorder
***********************************************************************/

		ParsingOriginalLocationRecorder::ParsingOriginalLocationRecorder(Ptr<IParsingPrintNodeRecorder> _recorder)
			:recorder(_recorder)
		{
		}

		ParsingOriginalLocationRecorder::~ParsingOriginalLocationRecorder()
		{
		}

		void ParsingOriginalLocationRecorder::Record(ParsingTreeCustomBase* node, const ParsingTextRange& range)
		{
			auto codeRange = node->codeRange;
			codeRange.codeIndex = range.codeIndex;
			recorder->Record(node, codeRange);
		}

/***********************************************************************
ParsingGeneratedLocationRecorder
***********************************************************************/

		ParsingGeneratedLocationRecorder::ParsingGeneratedLocationRecorder(RangeMap& _rangeMap)
			:rangeMap(_rangeMap)
		{
		}

		ParsingGeneratedLocationRecorder::~ParsingGeneratedLocationRecorder()
		{
		}

		void ParsingGeneratedLocationRecorder::Record(ParsingTreeCustomBase* node, const ParsingTextRange& range)
		{
			rangeMap.Add(node, range);
		}

/***********************************************************************
ParsingUpdateLocationRecorder
***********************************************************************/

		ParsingUpdateLocationRecorder::ParsingUpdateLocationRecorder()
		{
		}

		ParsingUpdateLocationRecorder::~ParsingUpdateLocationRecorder()
		{
		}

		void ParsingUpdateLocationRecorder::Record(ParsingTreeCustomBase* node, const ParsingTextRange& range)
		{
			node->codeRange = range;
		}

/***********************************************************************
ParsingWriter
***********************************************************************/

		void ParsingWriter::HandleChar(wchar_t c)
		{
			lastPos = currentPos;
			switch (c)
			{
			case L'\n':
				currentPos.index++;
				currentPos.row++;
				currentPos.column = 0;
				break;
			default:
				currentPos.index++;
				currentPos.column++;
			}
		}

		ParsingWriter::ParsingWriter(stream::TextWriter& _writer, Ptr<IParsingPrintNodeRecorder> _recorder, vint _codeIndex)
			:writer(_writer)
			, recorder(_recorder)
			, codeIndex(_codeIndex)
			, lastPos(-1, 0, -1)
			, currentPos(0, 0, 0)
		{
		}

		ParsingWriter::~ParsingWriter()
		{
		}

		void ParsingWriter::WriteChar(wchar_t c)
		{
			writer.WriteChar(c);
			if (!recorder) return;
			HandleChar(c);
		}

		void ParsingWriter::WriteString(const wchar_t* string, vint charCount)
		{
			writer.WriteString(string, charCount);
			if (!recorder) return;
			for (vint i = 0; i < charCount; i++)
			{
				HandleChar(string[i]);
			}
		}

		void ParsingWriter::BeforePrint(ParsingTreeCustomBase* node)
		{
			if (!recorder) return;
			nodePositions.Add(NodePosPair(node, currentPos));
		}

		void ParsingWriter::AfterPrint(ParsingTreeCustomBase* node)
		{
			if (!recorder) return;

			auto pair = nodePositions[nodePositions.Count() - 1];
			nodePositions.RemoveAt(nodePositions.Count() - 1);
			CHECK_ERROR(pair.key == node, L"vl::parsing::ParsingWriter::AfterPrint(ParsingTreeNode*)#BeforePrint and AfterPrint should be call in pairs.");

			ParsingTextRange range(pair.value, lastPos, codeIndex);
			recorder->Record(node, range);
		}
	}
}

#if defined(VCZH_GCC) && defined(__clang__)
#pragma clang diagnostic pop
#endif


/***********************************************************************
.\JSON\PARSINGJSON.CPP
***********************************************************************/

namespace vl
{
	namespace parsing
	{
		namespace json
		{
			using namespace stream;
			using namespace collections;

/***********************************************************************
Unescaping Function Foward Declarations
***********************************************************************/

			void JsonUnescapingString(vl::parsing::ParsingToken& value, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				value.value = GenerateToStream([&](StreamWriter& writer)
				{
					JsonUnescapeString(value.value.Sub(1, value.value.Length() - 2), writer);
				});
			}

/***********************************************************************
JsonPrintVisitor
***********************************************************************/

			class JsonPrintVisitor : public Object, public JsonNode::IVisitor
			{
			public:
				TextWriter&					writer;

				JsonPrintVisitor(TextWriter& _writer)
					:writer(_writer)
				{
				}

				void Visit(JsonLiteral* node)
				{
					switch(node->value)
					{
					case JsonLiteral::JsonValue::True:
						writer.WriteString(L"true");
						break;
					case JsonLiteral::JsonValue::False:
						writer.WriteString(L"false");
						break;
					case JsonLiteral::JsonValue::Null:
						writer.WriteString(L"null");
						break;
					}
				}

				void Visit(JsonString* node)
				{
					writer.WriteChar(L'\"');
					JsonEscapeString(node->content.value, writer);
					writer.WriteChar(L'\"');
				}

				void Visit(JsonNumber* node)
				{
					writer.WriteString(node->content.value);
				}

				void Visit(JsonArray* node)
				{
					writer.WriteChar(L'[');
					for (auto [item, i] : indexed(node->items))
					{
						if(i>0) writer.WriteChar(L',');
						item->Accept(this);
					}
					writer.WriteChar(L']');
				}

				void Visit(JsonObjectField* node)
				{
					writer.WriteChar(L'\"');
					JsonEscapeString(node->name.value, writer);
					writer.WriteString(L"\":");
					node->value->Accept(this);
				}

				void Visit(JsonObject* node)
				{
					writer.WriteChar(L'{');
					for (auto [field, i] : indexed(node->fields))
					{
						if(i>0) writer.WriteChar(L',');
						field->Accept(this);
					}
					writer.WriteChar(L'}');
				}
			};

/***********************************************************************
API
***********************************************************************/

			void JsonEscapeString(const WString& text, stream::TextWriter& writer)
			{
				const wchar_t* reading=text.Buffer();
				while(wchar_t c=*reading++)
				{
					switch(c)
					{
					case L'\"': writer.WriteString(L"\\\""); break;
					case L'\\': writer.WriteString(L"\\\\"); break;
					case L'/': writer.WriteString(L"\\/"); break;
					case L'\b': writer.WriteString(L"\\b"); break;
					case L'\f': writer.WriteString(L"\\f"); break;
					case L'\n': writer.WriteString(L"\\n"); break;
					case L'\r': writer.WriteString(L"\\r"); break;
					case L'\t': writer.WriteString(L"\\t"); break;
					default: writer.WriteChar(c);
					}
				}
			}

			vuint16_t GetHex(wchar_t c)
			{
				if(L'0'<=c && c<=L'9')
				{
					return c-L'0';
				}
				else if(L'A'<=c && c<=L'F')
				{
					return c-L'A';
				}
				else if(L'a'<=c && c<=L'f')
				{
					return c-L'a';
				}
				else
				{
					return 0;
				}
			}

			void JsonUnescapeString(const WString& text, stream::TextWriter& writer)
			{
				const wchar_t* reading=text.Buffer();
				while(wchar_t c=*reading++)
				{
					if(c==L'\\' && *reading)
					{
						switch(c=*reading++)
						{
						case L'b': writer.WriteChar(L'\b'); break;
						case L'f': writer.WriteChar(L'\f'); break;
						case L'n': writer.WriteChar(L'\n'); break;
						case L'r': writer.WriteChar(L'\r'); break;
						case L't': writer.WriteChar(L'\t'); break;
						case L'u':
							{
								wchar_t h1, h2, h3, h4;
								if((h1=reading[0]) && (h2=reading[1]) && (h3=reading[2]) && (h4=reading[3]))
								{
									reading+=4;
									wchar_t h=(wchar_t)(vuint16_t)(
										(GetHex(h1)<<12) +
										(GetHex(h2)<<8) +
										(GetHex(h3)<<4) +
										(GetHex(h4)<<0)
										);
									writer.WriteChar(h);
								}
							}
							break;
						default: writer.WriteChar(c);
						}
					}
					else
					{
						writer.WriteChar(c);
					}
				}
			}

			void JsonPrint(Ptr<JsonNode> node, stream::TextWriter& writer)
			{
				JsonPrintVisitor visitor(writer);
				node->Accept(&visitor);
			}

			WString JsonToString(Ptr<JsonNode> node)
			{
				return GenerateToStream([&](StreamWriter& writer)
				{
					JsonPrint(node, writer);
				});
			}
		}
	}
}


/***********************************************************************
.\JSON\PARSINGJSON_AST.CPP
***********************************************************************/
/***********************************************************************
This file is generated by: Vczh Parser Generator
From parser definition:ParsingJson.parser.txt
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	namespace parsing
	{
		namespace json
		{
/***********************************************************************
Visitor Pattern Implementation
***********************************************************************/

			void JsonLiteral::Accept(JsonNode::IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void JsonString::Accept(JsonNode::IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void JsonNumber::Accept(JsonNode::IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void JsonArray::Accept(JsonNode::IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void JsonObjectField::Accept(JsonNode::IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void JsonObject::Accept(JsonNode::IVisitor* visitor)
			{
				visitor->Visit(this);
			}

		}
	}
}
namespace vl
{
	namespace reflection
	{
		namespace description
		{
#ifndef VCZH_DEBUG_NO_REFLECTION
			using namespace vl::parsing::json;

#define PARSING_TOKEN_FIELD(NAME)\
			CLASS_MEMBER_EXTERNALMETHOD_TEMPLATE(get_##NAME, NO_PARAMETER, vl::WString(ClassType::*)(), [](ClassType* node) { return node->NAME.value; }, L"*", L"*")\
			CLASS_MEMBER_EXTERNALMETHOD_TEMPLATE(set_##NAME, { L"value" }, void(ClassType::*)(const vl::WString&), [](ClassType* node, const vl::WString& value) { node->NAME.value = value; }, L"*", L"*")\
			CLASS_MEMBER_PROPERTY_REFERENCETEMPLATE(NAME, get_##NAME, set_##NAME, L"$This->$Name.value")\

			IMPL_TYPE_INFO_RENAME(vl::parsing::json::JsonNode, system::JsonNode)
			IMPL_TYPE_INFO_RENAME(vl::parsing::json::JsonLiteral, system::JsonLiteral)
			IMPL_TYPE_INFO_RENAME(vl::parsing::json::JsonLiteral::JsonValue, system::JsonLiteral::JsonValue)
			IMPL_TYPE_INFO_RENAME(vl::parsing::json::JsonString, system::JsonString)
			IMPL_TYPE_INFO_RENAME(vl::parsing::json::JsonNumber, system::JsonNumber)
			IMPL_TYPE_INFO_RENAME(vl::parsing::json::JsonArray, system::JsonArray)
			IMPL_TYPE_INFO_RENAME(vl::parsing::json::JsonObjectField, system::JsonObjectField)
			IMPL_TYPE_INFO_RENAME(vl::parsing::json::JsonObject, system::JsonObject)
			IMPL_TYPE_INFO_RENAME(vl::parsing::json::JsonNode::IVisitor, system::JsonNode::IVisitor)

#ifdef VCZH_DESCRIPTABLEOBJECT_WITH_METADATA

			BEGIN_CLASS_MEMBER(JsonNode)
				CLASS_MEMBER_METHOD_OVERLOAD(Accept, {L"visitor"}, void(JsonNode::*)(JsonNode::IVisitor* visitor))
			END_CLASS_MEMBER(JsonNode)

			BEGIN_CLASS_MEMBER(JsonLiteral)
				CLASS_MEMBER_BASE(JsonNode)

				CLASS_MEMBER_CONSTRUCTOR(vl::Ptr<JsonLiteral>(), NO_PARAMETER)

				CLASS_MEMBER_FIELD(value)
			END_CLASS_MEMBER(JsonLiteral)

			BEGIN_ENUM_ITEM(JsonLiteral::JsonValue)
				ENUM_ITEM_NAMESPACE(JsonLiteral::JsonValue)
				ENUM_NAMESPACE_ITEM(True)
				ENUM_NAMESPACE_ITEM(False)
				ENUM_NAMESPACE_ITEM(Null)
			END_ENUM_ITEM(JsonLiteral::JsonValue)

			BEGIN_CLASS_MEMBER(JsonString)
				CLASS_MEMBER_BASE(JsonNode)

				CLASS_MEMBER_CONSTRUCTOR(vl::Ptr<JsonString>(), NO_PARAMETER)

				PARSING_TOKEN_FIELD(content)
			END_CLASS_MEMBER(JsonString)

			BEGIN_CLASS_MEMBER(JsonNumber)
				CLASS_MEMBER_BASE(JsonNode)

				CLASS_MEMBER_CONSTRUCTOR(vl::Ptr<JsonNumber>(), NO_PARAMETER)

				PARSING_TOKEN_FIELD(content)
			END_CLASS_MEMBER(JsonNumber)

			BEGIN_CLASS_MEMBER(JsonArray)
				CLASS_MEMBER_BASE(JsonNode)

				CLASS_MEMBER_CONSTRUCTOR(vl::Ptr<JsonArray>(), NO_PARAMETER)

				CLASS_MEMBER_FIELD(items)
			END_CLASS_MEMBER(JsonArray)

			BEGIN_CLASS_MEMBER(JsonObjectField)
				CLASS_MEMBER_BASE(JsonNode)

				CLASS_MEMBER_CONSTRUCTOR(vl::Ptr<JsonObjectField>(), NO_PARAMETER)

				PARSING_TOKEN_FIELD(name)
				CLASS_MEMBER_FIELD(value)
			END_CLASS_MEMBER(JsonObjectField)

			BEGIN_CLASS_MEMBER(JsonObject)
				CLASS_MEMBER_BASE(JsonNode)

				CLASS_MEMBER_CONSTRUCTOR(vl::Ptr<JsonObject>(), NO_PARAMETER)

				CLASS_MEMBER_FIELD(fields)
			END_CLASS_MEMBER(JsonObject)

			BEGIN_INTERFACE_MEMBER(JsonNode::IVisitor)
				CLASS_MEMBER_METHOD_OVERLOAD(Visit, {L"node"}, void(JsonNode::IVisitor::*)(JsonLiteral* node))
				CLASS_MEMBER_METHOD_OVERLOAD(Visit, {L"node"}, void(JsonNode::IVisitor::*)(JsonString* node))
				CLASS_MEMBER_METHOD_OVERLOAD(Visit, {L"node"}, void(JsonNode::IVisitor::*)(JsonNumber* node))
				CLASS_MEMBER_METHOD_OVERLOAD(Visit, {L"node"}, void(JsonNode::IVisitor::*)(JsonArray* node))
				CLASS_MEMBER_METHOD_OVERLOAD(Visit, {L"node"}, void(JsonNode::IVisitor::*)(JsonObjectField* node))
				CLASS_MEMBER_METHOD_OVERLOAD(Visit, {L"node"}, void(JsonNode::IVisitor::*)(JsonObject* node))
			END_INTERFACE_MEMBER(JsonNode)

#endif
#undef PARSING_TOKEN_FIELD

#ifdef VCZH_DESCRIPTABLEOBJECT_WITH_METADATA
			class JsonTypeLoader : public vl::Object, public ITypeLoader
			{
			public:
				void Load(ITypeManager* manager)
				{
					ADD_TYPE_INFO(vl::parsing::json::JsonNode)
					ADD_TYPE_INFO(vl::parsing::json::JsonLiteral)
					ADD_TYPE_INFO(vl::parsing::json::JsonLiteral::JsonValue)
					ADD_TYPE_INFO(vl::parsing::json::JsonString)
					ADD_TYPE_INFO(vl::parsing::json::JsonNumber)
					ADD_TYPE_INFO(vl::parsing::json::JsonArray)
					ADD_TYPE_INFO(vl::parsing::json::JsonObjectField)
					ADD_TYPE_INFO(vl::parsing::json::JsonObject)
					ADD_TYPE_INFO(vl::parsing::json::JsonNode::IVisitor)
				}

				void Unload(ITypeManager* manager)
				{
				}
			};
#endif
#endif

			bool JsonLoadTypes()
			{
#ifdef VCZH_DESCRIPTABLEOBJECT_WITH_METADATA
				ITypeManager* manager = GetGlobalTypeManager();
				if(manager)
				{
					auto loader = Ptr(new JsonTypeLoader);
					return manager->AddTypeLoader(loader);
				}
#endif
				return false;
			}
		}
	}
}


/***********************************************************************
.\JSON\PARSINGJSON_PARSER.CPP
***********************************************************************/
/***********************************************************************
This file is generated by: Vczh Parser Generator
From parser definition:ParsingJson.parser.txt
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	namespace parsing
	{
		namespace json
		{
/***********************************************************************
ParserText
***********************************************************************/

const wchar_t* const parserTextBuffer[] = {
  L"" L"\r\n"
, L"//////////////////////////////////////////////////////////////////" L"\r\n"
, L"// AST" L"\r\n"
, L"//////////////////////////////////////////////////////////////////" L"\r\n"
, L"" L"\r\n"
, L"class Node\t\t\t\t\t\t\t\t@Document(\"Base class of JSON nodes.\")" L"\r\n"
, L"{" L"\r\n"
, L"}" L"\r\n"
, L"" L"\r\n"
, L"class Literal:Node\t\t\t\t\t\t@Document(\"Literal value node that is not number or string.\")" L"\r\n"
, L"{" L"\r\n"
, L"\tenum Value\t\t\t\t\t\t\t@Document(\"Literal value.\")" L"\r\n"
, L"\t{" L"\r\n"
, L"\t\tTrue\t\t\t\t\t\t\t@Document(\"A boolean literal: true.\")," L"\r\n"
, L"\t\tFalse\t\t\t\t\t\t\t@Document(\"A boolean literal: false.\")," L"\r\n"
, L"\t\tNull\t\t\t\t\t\t\t@Document(\"A null literal.\")," L"\r\n"
, L"\t}" L"\r\n"
, L"" L"\r\n"
, L"\tValue value\t\t\t\t\t\t\t@Document(\"The literal value.\");" L"\r\n"
, L"}" L"\r\n"
, L"" L"\r\n"
, L"class String:Node\t\t\t\t\t\t@Document(\"String literal value node.\")" L"\r\n"
, L"{" L"\r\n"
, L"\ttoken content(JsonUnescapingString)\t@Document(\"Content of the string literal.\"), @Color(\"String\");" L"\r\n"
, L"}" L"\r\n"
, L"" L"\r\n"
, L"class Number:Node\t\t\t\t\t\t@Document(\"Number literal value node.\")" L"\r\n"
, L"{" L"\r\n"
, L"\ttoken content\t\t\t\t\t\t@Document(\"Content of the number literal.\");" L"\r\n"
, L"}" L"\r\n"
, L"" L"\r\n"
, L"class Array:Node\t\t\t\t\t\t@Document(\"Array node.\")" L"\r\n"
, L"{" L"\r\n"
, L"\tNode[] items\t\t\t\t\t\t@Document(\"Array elements.\");" L"\r\n"
, L"}" L"\r\n"
, L"" L"\r\n"
, L"class ObjectField:Node\t\t\t\t\t@Document(\"Object property node.\")" L"\r\n"
, L"{" L"\r\n"
, L"\ttoken name(JsonUnescapingString)\t@Document(\"Property name.\"), @Color(\"AttName\");" L"\r\n"
, L"\tNode value\t\t\t\t\t\t\t@Document(\"Property value.\");" L"\r\n"
, L"}" L"\r\n"
, L"" L"\r\n"
, L"class Object:Node\t\t\t\t\t\t@Document(\"Object node.\")" L"\r\n"
, L"{" L"\r\n"
, L"\tObjectField[] fields\t\t\t\t@Document(\"Object properties.\");" L"\r\n"
, L"}" L"\r\n"
, L"" L"\r\n"
, L"//////////////////////////////////////////////////////////////////" L"\r\n"
, L"// Lexer" L"\r\n"
, L"//////////////////////////////////////////////////////////////////" L"\r\n"
, L"" L"\r\n"
, L"token TRUEVALUE = \"true\"\t\t\t\t\t\t\t@Color(\"Keyword\");" L"\r\n"
, L"token FALSEVALUE = \"false\"\t\t\t\t\t\t\t@Color(\"Keyword\");" L"\r\n"
, L"token NULLVALUE = \"null\"\t\t\t\t\t\t\t@Color(\"Keyword\");" L"\r\n"
, L"token OBJOPEN = \"\\{\"\t\t\t\t\t\t\t\t@Color(\"Boundary\");" L"\r\n"
, L"token OBJCLOSE = \"\\}\"\t\t\t\t\t\t\t\t@Color(\"Boundary\");" L"\r\n"
, L"token ARROPEN = \"\\[\"\t\t\t\t\t\t\t\t@Color(\"Boundary\");" L"\r\n"
, L"token ARRCLOSE = \"\\]\"\t\t\t\t\t\t\t\t@Color(\"Boundary\");" L"\r\n"
, L"token COMMA = \",\";" L"\r\n"
, L"token COLON = \":\";" L"\r\n"
, L"token NUMBER = \"[\\-]?\\d+(.\\d+)?([eE][+\\-]?\\d+)?\"\t@Color(\"Number\");" L"\r\n"
, L"token STRING = \"\"\"([^\\\\\"\"]|\\\\[^u]|\\\\u\\d{4})*\"\"\"\t\t@ContextColor();" L"\r\n"
, L"" L"\r\n"
, L"discardtoken SPACE = \"\\s+\";" L"\r\n"
, L"" L"\r\n"
, L"//////////////////////////////////////////////////////////////////" L"\r\n"
, L"// Rules" L"\r\n"
, L"//////////////////////////////////////////////////////////////////" L"\r\n"
, L"" L"\r\n"
, L"rule Node JLiteral" L"\r\n"
, L"\t= STRING:content as String" L"\r\n"
, L"\t= NUMBER:content as Number" L"\r\n"
, L"\t= \"true\" as Literal with {value = \"True\"}" L"\r\n"
, L"\t= \"false\" as Literal with {value = \"False\"}" L"\r\n"
, L"\t= \"null\" as Literal with {value = \"Null\"}" L"\r\n"
, L"\t;" L"\r\n"
, L"" L"\r\n"
, L"rule ObjectField JField" L"\r\n"
, L"\t= STRING:name \":\" JValue:value as ObjectField" L"\r\n"
, L"\t;" L"\r\n"
, L"" L"\r\n"
, L"rule Object JObject" L"\r\n"
, L"\t= \"{\" [JField:fields {\",\" JField:fields} ] \"}\" as Object" L"\r\n"
, L"\t;" L"\r\n"
, L"" L"\r\n"
, L"rule Array JArray" L"\r\n"
, L"\t= \"[\" [JValue:items {\",\" JValue:items} ] \"]\" as Array" L"\r\n"
, L"\t;" L"\r\n"
, L"" L"\r\n"
, L"rule Node JValue" L"\r\n"
, L"\t= !JLiteral" L"\r\n"
, L"\t= !JObject" L"\r\n"
, L"\t= !JArray" L"\r\n"
, L"\t;" L"\r\n"
, L"" L"\r\n"
, L"rule Node JRoot" L"\r\n"
, L"\t= !JObject" L"\r\n"
, L"\t= !JArray" L"\r\n"
, L"\t;" L"\r\n"
};
const vint lengthTextBuffer[] = {
  2, 68, 8, 68, 2, 58, 3, 3, 2, 87, 3, 47, 4, 53, 55, 44, 4, 2, 53, 3, 2, 64, 3, 101, 3, 2, 64, 3, 66, 3, 2, 48
, 3, 50, 3, 2, 63, 3, 83, 49, 3, 2, 50, 3, 59, 3, 2, 68, 10, 68, 2, 51, 53, 51, 49, 50, 49, 50, 20, 20, 68, 67, 2, 29
, 2, 68, 10, 68, 2, 20, 29, 29, 44, 46, 44, 4, 2, 25, 48, 4, 2, 21, 59, 4, 2, 19, 56, 4, 2, 18, 14, 13, 12, 4, 2, 17
, 13, 12, 4
};
const vint lengthTextBufferTotal = 2738;

			vl::WString JsonGetParserTextBuffer()
			{
				vl::collections::Array<wchar_t> textBuffer(lengthTextBufferTotal + 1);
				wchar_t* reading = &textBuffer[0];
				for(vint i = 0; i < sizeof(parserTextBuffer) / sizeof(*parserTextBuffer); i++)
				{
					memcpy(reading, parserTextBuffer[i], lengthTextBuffer[i] * sizeof(wchar_t));
					reading += lengthTextBuffer[i];
				}
				*reading = 0;
				return &textBuffer[0];
			}

/***********************************************************************
SerializedTable
***********************************************************************/

const vint parserBufferLength = 4281; // 19135 bytes before compressing
const vint parserBufferBlock = 1024;
const vint parserBufferRemain = 185;
const vint parserBufferRows = 5;
const char* const parserBuffer[] = {
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};

			void JsonGetParserBuffer(vl::stream::MemoryStream& stream)
			{
				vl::stream::MemoryStream compressedStream;
				for (vint i = 0; i < parserBufferRows; i++)
				{
					vint size = i == parserBufferRows - 1 ? parserBufferRemain : parserBufferBlock;
					compressedStream.Write((void*)parserBuffer[i], size);
				}
				compressedStream.SeekFromBegin(0);
				vl::stream::LzwDecoder decoder;
				vl::stream::DecoderStream decoderStream(compressedStream, decoder);
				vl::collections::Array<vl::vuint8_t> buffer(65536);
				while (true)
				{
					vl::vint size = decoderStream.Read(&buffer[0], 65536);
					if (size == 0) break;
					stream.Write(&buffer[0], size);
				}
				stream.SeekFromBegin(0);
			}
/***********************************************************************
Unescaping Function Foward Declarations
***********************************************************************/

			extern void JsonUnescapingString(vl::parsing::ParsingToken& value, const vl::collections::List<vl::regex::RegexToken>& tokens);

/***********************************************************************
Parsing Tree Conversion Driver Implementation
***********************************************************************/

			class JsonTreeConverter : public vl::parsing::ParsingTreeConverter
			{
			public:
				using vl::parsing::ParsingTreeConverter::SetMember;

				bool SetMember(JsonLiteral::JsonValue& member, vl::Ptr<vl::parsing::ParsingTreeNode> node, const TokenList& tokens)
				{
					vl::Ptr<vl::parsing::ParsingTreeToken> token=node.Cast<vl::parsing::ParsingTreeToken>();
					if(token)
					{
						if(token->GetValue()==L"True") { member=JsonLiteral::JsonValue::True; return true; }
						else if(token->GetValue()==L"False") { member=JsonLiteral::JsonValue::False; return true; }
						else if(token->GetValue()==L"Null") { member=JsonLiteral::JsonValue::Null; return true; }
						else { member=JsonLiteral::JsonValue::True; return false; }
					}
					member=JsonLiteral::JsonValue::True;
					return false;
				}

				void Fill(vl::Ptr<JsonNode> tree, vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)
				{
				}

				void Fill(vl::Ptr<JsonLiteral> tree, vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)
				{
					SetMember(tree->value, obj->GetMember(L"value"), tokens);
				}

				void Fill(vl::Ptr<JsonString> tree, vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)
				{
					if(SetMember(tree->content, obj->GetMember(L"content"), tokens))
					{
						JsonUnescapingString(tree->content, tokens);
					}
				}

				void Fill(vl::Ptr<JsonNumber> tree, vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)
				{
					SetMember(tree->content, obj->GetMember(L"content"), tokens);
				}

				void Fill(vl::Ptr<JsonArray> tree, vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)
				{
					SetMember(tree->items, obj->GetMember(L"items"), tokens);
				}

				void Fill(vl::Ptr<JsonObjectField> tree, vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)
				{
					if(SetMember(tree->name, obj->GetMember(L"name"), tokens))
					{
						JsonUnescapingString(tree->name, tokens);
					}
					SetMember(tree->value, obj->GetMember(L"value"), tokens);
				}

				void Fill(vl::Ptr<JsonObject> tree, vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)
				{
					SetMember(tree->fields, obj->GetMember(L"fields"), tokens);
				}

				vl::Ptr<vl::parsing::ParsingTreeCustomBase> ConvertClass(vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)override
				{
					if(obj->GetType() == L"Literal")
					{
						auto tree = vl::Ptr(new JsonLiteral);
						vl::collections::CopyFrom(tree->creatorRules, obj->GetCreatorRules());
						Fill(tree, obj, tokens);
						Fill(tree.Cast<JsonNode>(), obj, tokens);
						return tree;
					}
					else if(obj->GetType() == L"String")
					{
						auto tree = vl::Ptr(new JsonString);
						vl::collections::CopyFrom(tree->creatorRules, obj->GetCreatorRules());
						Fill(tree, obj, tokens);
						Fill(tree.Cast<JsonNode>(), obj, tokens);
						return tree;
					}
					else if(obj->GetType() == L"Number")
					{
						auto tree = vl::Ptr(new JsonNumber);
						vl::collections::CopyFrom(tree->creatorRules, obj->GetCreatorRules());
						Fill(tree, obj, tokens);
						Fill(tree.Cast<JsonNode>(), obj, tokens);
						return tree;
					}
					else if(obj->GetType() == L"Array")
					{
						auto tree = vl::Ptr(new JsonArray);
						vl::collections::CopyFrom(tree->creatorRules, obj->GetCreatorRules());
						Fill(tree, obj, tokens);
						Fill(tree.Cast<JsonNode>(), obj, tokens);
						return tree;
					}
					else if(obj->GetType() == L"ObjectField")
					{
						auto tree = vl::Ptr(new JsonObjectField);
						vl::collections::CopyFrom(tree->creatorRules, obj->GetCreatorRules());
						Fill(tree, obj, tokens);
						Fill(tree.Cast<JsonNode>(), obj, tokens);
						return tree;
					}
					else if(obj->GetType() == L"Object")
					{
						auto tree = vl::Ptr(new JsonObject);
						vl::collections::CopyFrom(tree->creatorRules, obj->GetCreatorRules());
						Fill(tree, obj, tokens);
						Fill(tree.Cast<JsonNode>(), obj, tokens);
						return tree;
					}
					else 
						return 0;
				}
			};

			vl::Ptr<vl::parsing::ParsingTreeCustomBase> JsonConvertParsingTreeNode(vl::Ptr<vl::parsing::ParsingTreeNode> node, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				JsonTreeConverter converter;
				vl::Ptr<vl::parsing::ParsingTreeCustomBase> tree;
				converter.SetMember(tree, node, tokens);
				return tree;
			}

/***********************************************************************
Parsing Tree Conversion Implementation
***********************************************************************/

			vl::Ptr<JsonLiteral> JsonLiteral::Convert(vl::Ptr<vl::parsing::ParsingTreeNode> node, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				return JsonConvertParsingTreeNode(node, tokens).Cast<JsonLiteral>();
			}

			vl::Ptr<JsonString> JsonString::Convert(vl::Ptr<vl::parsing::ParsingTreeNode> node, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				return JsonConvertParsingTreeNode(node, tokens).Cast<JsonString>();
			}

			vl::Ptr<JsonNumber> JsonNumber::Convert(vl::Ptr<vl::parsing::ParsingTreeNode> node, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				return JsonConvertParsingTreeNode(node, tokens).Cast<JsonNumber>();
			}

			vl::Ptr<JsonArray> JsonArray::Convert(vl::Ptr<vl::parsing::ParsingTreeNode> node, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				return JsonConvertParsingTreeNode(node, tokens).Cast<JsonArray>();
			}

			vl::Ptr<JsonObjectField> JsonObjectField::Convert(vl::Ptr<vl::parsing::ParsingTreeNode> node, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				return JsonConvertParsingTreeNode(node, tokens).Cast<JsonObjectField>();
			}

			vl::Ptr<JsonObject> JsonObject::Convert(vl::Ptr<vl::parsing::ParsingTreeNode> node, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				return JsonConvertParsingTreeNode(node, tokens).Cast<JsonObject>();
			}

/***********************************************************************
Parser Function
***********************************************************************/

			vl::Ptr<vl::parsing::ParsingTreeNode> JsonParseAsParsingTreeNode(const vl::WString& input, vl::Ptr<vl::parsing::tabling::ParsingTable> table, vl::collections::List<vl::Ptr<vl::parsing::ParsingError>>& errors, vl::vint codeIndex)
			{
				vl::parsing::tabling::ParsingState state(input, table, codeIndex);
				state.Reset(L"JRoot");
				vl::Ptr<vl::parsing::tabling::ParsingGeneralParser> parser=vl::parsing::tabling::CreateStrictParser(table);
				vl::Ptr<vl::parsing::ParsingTreeNode> node=parser->Parse(state, errors);
				return node;
			}

			vl::Ptr<vl::parsing::ParsingTreeNode> JsonParseAsParsingTreeNode(const vl::WString& input, vl::Ptr<vl::parsing::tabling::ParsingTable> table, vl::vint codeIndex)
			{
				vl::collections::List<vl::Ptr<vl::parsing::ParsingError>> errors;
				return JsonParseAsParsingTreeNode(input, table, errors, codeIndex);
			}

			vl::Ptr<JsonNode> JsonParse(const vl::WString& input, vl::Ptr<vl::parsing::tabling::ParsingTable> table, vl::collections::List<vl::Ptr<vl::parsing::ParsingError>>& errors, vl::vint codeIndex)
			{
				vl::parsing::tabling::ParsingState state(input, table, codeIndex);
				state.Reset(L"JRoot");
				vl::Ptr<vl::parsing::tabling::ParsingGeneralParser> parser=vl::parsing::tabling::CreateStrictParser(table);
				vl::Ptr<vl::parsing::ParsingTreeNode> node=parser->Parse(state, errors);
				if(node && errors.Count()==0)
				{
					return JsonConvertParsingTreeNode(node, state.GetTokens()).Cast<JsonNode>();
				}
				return 0;
			}

			vl::Ptr<JsonNode> JsonParse(const vl::WString& input, vl::Ptr<vl::parsing::tabling::ParsingTable> table, vl::vint codeIndex)
			{
				vl::collections::List<vl::Ptr<vl::parsing::ParsingError>> errors;
				return JsonParse(input, table, errors, codeIndex);
			}

/***********************************************************************
Table Generation
***********************************************************************/

			vl::Ptr<vl::parsing::tabling::ParsingTable> JsonLoadTable()
			{
				vl::stream::MemoryStream stream;
				JsonGetParserBuffer(stream);
				auto table = vl::Ptr(new vl::parsing::tabling::ParsingTable(stream));
				table->Initialize();
				return table;
			}

		}
	}
}


/***********************************************************************
.\XML\PARSINGXML.CPP
***********************************************************************/

namespace vl
{
	namespace parsing
	{
		namespace xml
		{
			using namespace stream;
			using namespace collections;
			using namespace regex;

/***********************************************************************
Unescaping Function Foward Declarations
***********************************************************************/

			void XmlMergeTextFragment(vl::collections::List<vl::Ptr<XmlNode>>& value, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				vint begin=-1;
				vint end=-1;
				for(vint i=value.Count()-1;i>=-1;i--)
				{
					if(i==-1)
					{
						if(end!=-1) begin=0;
					}
					else if(value[i].Cast<XmlText>())
					{
						if(end==-1) end=i;
					}
					else
					{
						if(end!=-1) begin=i+1;
					}
					if(begin!=-1 && end!=-1)
					{
						vint tokenBegin=value[begin].Cast<XmlText>()->content.tokenIndex;
						vint tokenEnd=value[end].Cast<XmlText>()->content.tokenIndex;
						while(tokenBegin>0)
						{
							if(tokens.Get(tokenBegin-1).token==(vint)XmlParserTokenIndex::SPACE || tokens.Get(tokenBegin-1).token==-1)
							{
								tokenBegin--;
							}
							else
							{
								break;
							}
						}
						while(tokenEnd<tokens.Count()-1)
						{
							if(tokens.Get(tokenEnd+1).token==(vint)XmlParserTokenIndex::SPACE || tokens.Get(tokenEnd+1).token==-1)
							{
								tokenEnd++;
							}
							else
							{
								break;
							}
						}

						const RegexToken& beginToken=tokens.Get(tokenBegin);
						const RegexToken& endToken=tokens.Get(tokenEnd);
						const wchar_t* textBegin=beginToken.reading;
						const wchar_t* textEnd=endToken.reading+endToken.length;
						WString text=WString::CopyFrom(textBegin, vint(textEnd-textBegin));
						ParsingTextRange range(&beginToken, &endToken);

						auto xmlText = Ptr(new XmlText);
						xmlText->codeRange=range;
						xmlText->content.codeRange=range;
						xmlText->content.value=XmlUnescapeValue(text);

						value.RemoveRange(begin, end-begin+1);
						value.Insert(begin, xmlText);

						begin=-1;
						end=-1;
					}
				}
			}

			void XmlUnescapeAttributeValue(vl::parsing::ParsingToken& value, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				value.value=XmlUnescapeValue(value.value.Sub(1, value.value.Length()-2));
			}

			void XmlUnescapeCData(vl::parsing::ParsingToken& value, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				value.value=XmlUnescapeCData(value.value);
			}

			void XmlUnescapeComment(vl::parsing::ParsingToken& value, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				value.value=XmlUnescapeComment(value.value);
			}

/***********************************************************************
XmlPrintVisitor
***********************************************************************/

			class XmlPrintVisitor : public Object, public XmlNode::IVisitor
			{
			public:
				TextWriter&					writer;

				XmlPrintVisitor(TextWriter& _writer)
					:writer(_writer)
				{
				}

				void Visit(XmlText* node)
				{
					writer.WriteString(XmlEscapeValue(node->content.value));
				}

				void Visit(XmlCData* node)
				{
					writer.WriteString(XmlEscapeCData(node->content.value));
				}

				void Visit(XmlAttribute* node)
				{
					writer.WriteString(node->name.value);
					writer.WriteString(L"=\"");
					writer.WriteString(XmlEscapeValue(node->value.value));
					writer.WriteString(L"\"");
				}

				void Visit(XmlComment* node)
				{
					writer.WriteString(XmlEscapeComment(node->content.value));
				}

				void Visit(XmlElement* node)
				{
					writer.WriteChar(L'<');
					writer.WriteString(node->name.value);
					for (auto att : node->attributes)
					{
						writer.WriteChar(L' ');
						att->Accept(this);
					}
					if(node->subNodes.Count()==0)
					{
						writer.WriteString(L"/>");
					}
					else
					{
						writer.WriteChar(L'>');
						for (auto subNode : node->subNodes)
						{
							subNode->Accept(this);
						}
						writer.WriteString(L"</");
						writer.WriteString(node->name.value);
						writer.WriteChar(L'>');
					}
				}

				void Visit(XmlInstruction* node)
				{
					writer.WriteString(L"<?");
					writer.WriteString(node->name.value);
					for (auto att : node->attributes)
					{
						writer.WriteChar(L' ');
						att->Accept(this);
					}
					writer.WriteString(L"?>");
				}

				void Visit(XmlDocument* node)
				{
					for (auto prolog : node->prologs)
					{
						prolog->Accept(this);
					}
					node->rootElement->Accept(this);
				}
			};

/***********************************************************************
API
***********************************************************************/

			WString XmlEscapeValue(const WString& value)
			{
				WString result;
				const wchar_t* reading=value.Buffer();
				while(wchar_t c=*reading++)
				{
					switch(c)
					{
					case L'<':
						result+=L"&lt;";
						break;
					case L'>':
						result+=L"&gt;";
						break;
					case L'&':
						result+=L"&amp;";
						break;
					case L'\'':
						result+=L"&apos;";
						break;
					case L'\"':
						result+=L"&quot;";
						break;
					default:
						result+=WString::FromChar(c);
					}
				}
				return result;
			}

			WString XmlUnescapeValue(const WString& value)
			{
				WString result;
				const wchar_t* reading=value.Buffer();
				while(*reading)
				{
					if(wcsncmp(reading, L"&lt;", 4)==0)
					{
						result+=WString::FromChar(L'<');
						reading+=4;
					}
					else if(wcsncmp(reading, L"&gt;", 4)==0)
					{
						result+=WString::FromChar(L'>');
						reading+=4;
					}
					else if(wcsncmp(reading, L"&amp;", 5)==0)
					{
						result+=WString::FromChar(L'&');
						reading+=5;
					}
					else if(wcsncmp(reading, L"&apos;", 6)==0)
					{
						result+=WString::FromChar(L'\'');
						reading+=6;
					}
					else if(wcsncmp(reading, L"&quot;", 6)==0)
					{
						result+=WString::FromChar(L'\"');
						reading+=6;
					}
					else
					{
						result+=WString::FromChar(*reading++);
					}
				}
				return result;
			}

			WString XmlEscapeCData(const WString& value)
			{
				return L"<![CDATA["+value+L"]]>";
			}

			WString XmlUnescapeCData(const WString& value)
			{
				return value.Sub(9, value.Length()-12);
			}

			WString XmlEscapeComment(const WString& value)
			{
				return L"<!--"+value+L"-->";
			}

			WString XmlUnescapeComment(const WString& value)
			{
				return value.Sub(4, value.Length()-7);
			}

			void XmlPrint(Ptr<XmlNode> node, stream::TextWriter& writer)
			{
				XmlPrintVisitor visitor(writer);
				node->Accept(&visitor);
			}

			void XmlPrintContent(Ptr<XmlElement> element, stream::TextWriter& writer)
			{
				XmlPrintVisitor visitor(writer);
				for (auto node : element->subNodes)
				{
					node->Accept(&visitor);
				}
			}

			WString XmlToString(Ptr<XmlNode> node)
			{
				return GenerateToStream([&](StreamWriter& writer)
				{
					XmlPrint(node, writer);
				});
			}

/***********************************************************************
Linq To Xml
***********************************************************************/

			Ptr<XmlAttribute> XmlGetAttribute(Ptr<XmlElement> element, const WString& name)
			{
				return XmlGetAttribute(element.Obj(), name);
			}

			Ptr<XmlElement> XmlGetElement(Ptr<XmlElement> element, const WString& name)
			{
				return XmlGetElement(element.Obj(), name);
			}

			collections::LazyList<Ptr<XmlElement>> XmlGetElements(Ptr<XmlElement> element)
			{
				return XmlGetElements(element.Obj());
			}

			collections::LazyList<Ptr<XmlElement>> XmlGetElements(Ptr<XmlElement> element, const WString& name)
			{
				return XmlGetElements(element.Obj(), name);
			}

			WString XmlGetValue(Ptr<XmlElement> element)
			{
				return XmlGetValue(element.Obj());
			}

			Ptr<XmlAttribute> XmlGetAttribute(XmlElement* element, const WString& name)
			{
				for (auto att : element->attributes)
				{
					if(att->name.value==name)
					{
						return att;
					}
				}
				return 0;
			}

			Ptr<XmlElement> XmlGetElement(XmlElement* element, const WString& name)
			{
				for (auto node : element->subNodes)
				{
					Ptr<XmlElement> subElement=node.Cast<XmlElement>();
					if(subElement && subElement->name.value==name)
					{
						return subElement;
					}
				}
				return 0;
			}

			collections::LazyList<Ptr<XmlElement>> XmlGetElements(XmlElement* element)
			{
				return From(element->subNodes)
					.FindType<XmlElement>();
			}

			collections::LazyList<Ptr<XmlElement>> XmlGetElements(XmlElement* element, const WString& name)
			{
				return From(element->subNodes)
					.FindType<XmlElement>()
					.Where([name](auto&& e){return e->name.value==name;});
			}

			WString XmlGetValue(XmlElement* element)
			{
				WString result;
				for (auto node : element->subNodes)
				{
					if(Ptr<XmlText> text=node.Cast<XmlText>())
					{
						result+=text->content.value;
					}
					else if(Ptr<XmlCData> text=node.Cast<XmlCData>())
					{
						result+=text->content.value;
					}
				}
				return result;
			}

/***********************************************************************
XmlElementWriter
***********************************************************************/

			XmlElementWriter::XmlElementWriter(Ptr<XmlElement> _element, const XmlElementWriter* _previousWriter)
				:element(_element)
				,previousWriter(_previousWriter)
			{
			}

			XmlElementWriter::~XmlElementWriter()
			{
			}

			const XmlElementWriter& XmlElementWriter::Attribute(const WString& name, const WString& value)const
			{
				auto node = Ptr(new XmlAttribute);
				node->name.value=name;
				node->value.value=value;
				element->attributes.Add(node);
				return *this;
			}

			XmlElementWriter XmlElementWriter::Element(const WString& name)const
			{
				auto node = Ptr(new XmlElement);
				node->name.value=name;
				element->subNodes.Add(node);
				return XmlElementWriter(node, this);
			}

			const XmlElementWriter& XmlElementWriter::End()const
			{
				return *previousWriter;
			}

			const XmlElementWriter& XmlElementWriter::Text(const WString& value)const
			{
				auto node = Ptr(new XmlText);
				node->content.value=value;
				element->subNodes.Add(node);
				return *this;
			}

			const XmlElementWriter& XmlElementWriter::CData(const WString& value)const
			{
				auto node = Ptr(new XmlCData);
				node->content.value=value;
				element->subNodes.Add(node);
				return *this;
			}

			const XmlElementWriter& XmlElementWriter::Comment(const WString& value)const
			{
				auto node = Ptr(new XmlComment);
				node->content.value=value;
				element->subNodes.Add(node);
				return *this;
			}
		}
	}
}


/***********************************************************************
.\XML\PARSINGXML_AST.CPP
***********************************************************************/
/***********************************************************************
This file is generated by: Vczh Parser Generator
From parser definition:ParsingXml.parser.txt
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	namespace parsing
	{
		namespace xml
		{
/***********************************************************************
Visitor Pattern Implementation
***********************************************************************/

			void XmlText::Accept(XmlNode::IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void XmlCData::Accept(XmlNode::IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void XmlAttribute::Accept(XmlNode::IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void XmlComment::Accept(XmlNode::IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void XmlElement::Accept(XmlNode::IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void XmlInstruction::Accept(XmlNode::IVisitor* visitor)
			{
				visitor->Visit(this);
			}

			void XmlDocument::Accept(XmlNode::IVisitor* visitor)
			{
				visitor->Visit(this);
			}

		}
	}
}
namespace vl
{
	namespace reflection
	{
		namespace description
		{
#ifndef VCZH_DEBUG_NO_REFLECTION
			using namespace vl::parsing::xml;

#define PARSING_TOKEN_FIELD(NAME)\
			CLASS_MEMBER_EXTERNALMETHOD_TEMPLATE(get_##NAME, NO_PARAMETER, vl::WString(ClassType::*)(), [](ClassType* node) { return node->NAME.value; }, L"*", L"*")\
			CLASS_MEMBER_EXTERNALMETHOD_TEMPLATE(set_##NAME, { L"value" }, void(ClassType::*)(const vl::WString&), [](ClassType* node, const vl::WString& value) { node->NAME.value = value; }, L"*", L"*")\
			CLASS_MEMBER_PROPERTY_REFERENCETEMPLATE(NAME, get_##NAME, set_##NAME, L"$This->$Name.value")\

			IMPL_TYPE_INFO_RENAME(vl::parsing::xml::XmlNode, system::XmlNode)
			IMPL_TYPE_INFO_RENAME(vl::parsing::xml::XmlText, system::XmlText)
			IMPL_TYPE_INFO_RENAME(vl::parsing::xml::XmlCData, system::XmlCData)
			IMPL_TYPE_INFO_RENAME(vl::parsing::xml::XmlAttribute, system::XmlAttribute)
			IMPL_TYPE_INFO_RENAME(vl::parsing::xml::XmlComment, system::XmlComment)
			IMPL_TYPE_INFO_RENAME(vl::parsing::xml::XmlElement, system::XmlElement)
			IMPL_TYPE_INFO_RENAME(vl::parsing::xml::XmlInstruction, system::XmlInstruction)
			IMPL_TYPE_INFO_RENAME(vl::parsing::xml::XmlDocument, system::XmlDocument)
			IMPL_TYPE_INFO_RENAME(vl::parsing::xml::XmlNode::IVisitor, system::XmlNode::IVisitor)

#ifdef VCZH_DESCRIPTABLEOBJECT_WITH_METADATA

			BEGIN_CLASS_MEMBER(XmlNode)
				CLASS_MEMBER_METHOD_OVERLOAD(Accept, {L"visitor"}, void(XmlNode::*)(XmlNode::IVisitor* visitor))
			END_CLASS_MEMBER(XmlNode)

			BEGIN_CLASS_MEMBER(XmlText)
				CLASS_MEMBER_BASE(XmlNode)

				CLASS_MEMBER_CONSTRUCTOR(vl::Ptr<XmlText>(), NO_PARAMETER)

				PARSING_TOKEN_FIELD(content)
			END_CLASS_MEMBER(XmlText)

			BEGIN_CLASS_MEMBER(XmlCData)
				CLASS_MEMBER_BASE(XmlNode)

				CLASS_MEMBER_CONSTRUCTOR(vl::Ptr<XmlCData>(), NO_PARAMETER)

				PARSING_TOKEN_FIELD(content)
			END_CLASS_MEMBER(XmlCData)

			BEGIN_CLASS_MEMBER(XmlAttribute)
				CLASS_MEMBER_BASE(XmlNode)

				CLASS_MEMBER_CONSTRUCTOR(vl::Ptr<XmlAttribute>(), NO_PARAMETER)

				PARSING_TOKEN_FIELD(name)
				PARSING_TOKEN_FIELD(value)
			END_CLASS_MEMBER(XmlAttribute)

			BEGIN_CLASS_MEMBER(XmlComment)
				CLASS_MEMBER_BASE(XmlNode)

				CLASS_MEMBER_CONSTRUCTOR(vl::Ptr<XmlComment>(), NO_PARAMETER)

				PARSING_TOKEN_FIELD(content)
			END_CLASS_MEMBER(XmlComment)

			BEGIN_CLASS_MEMBER(XmlElement)
				CLASS_MEMBER_BASE(XmlNode)

				CLASS_MEMBER_CONSTRUCTOR(vl::Ptr<XmlElement>(), NO_PARAMETER)

				PARSING_TOKEN_FIELD(name)
				PARSING_TOKEN_FIELD(closingName)
				CLASS_MEMBER_FIELD(attributes)
				CLASS_MEMBER_FIELD(subNodes)
			END_CLASS_MEMBER(XmlElement)

			BEGIN_CLASS_MEMBER(XmlInstruction)
				CLASS_MEMBER_BASE(XmlNode)

				CLASS_MEMBER_CONSTRUCTOR(vl::Ptr<XmlInstruction>(), NO_PARAMETER)

				PARSING_TOKEN_FIELD(name)
				CLASS_MEMBER_FIELD(attributes)
			END_CLASS_MEMBER(XmlInstruction)

			BEGIN_CLASS_MEMBER(XmlDocument)
				CLASS_MEMBER_BASE(XmlNode)

				CLASS_MEMBER_CONSTRUCTOR(vl::Ptr<XmlDocument>(), NO_PARAMETER)

				CLASS_MEMBER_FIELD(prologs)
				CLASS_MEMBER_FIELD(rootElement)
			END_CLASS_MEMBER(XmlDocument)

			BEGIN_INTERFACE_MEMBER(XmlNode::IVisitor)
				CLASS_MEMBER_METHOD_OVERLOAD(Visit, {L"node"}, void(XmlNode::IVisitor::*)(XmlText* node))
				CLASS_MEMBER_METHOD_OVERLOAD(Visit, {L"node"}, void(XmlNode::IVisitor::*)(XmlCData* node))
				CLASS_MEMBER_METHOD_OVERLOAD(Visit, {L"node"}, void(XmlNode::IVisitor::*)(XmlAttribute* node))
				CLASS_MEMBER_METHOD_OVERLOAD(Visit, {L"node"}, void(XmlNode::IVisitor::*)(XmlComment* node))
				CLASS_MEMBER_METHOD_OVERLOAD(Visit, {L"node"}, void(XmlNode::IVisitor::*)(XmlElement* node))
				CLASS_MEMBER_METHOD_OVERLOAD(Visit, {L"node"}, void(XmlNode::IVisitor::*)(XmlInstruction* node))
				CLASS_MEMBER_METHOD_OVERLOAD(Visit, {L"node"}, void(XmlNode::IVisitor::*)(XmlDocument* node))
			END_INTERFACE_MEMBER(XmlNode)

#endif
#undef PARSING_TOKEN_FIELD

#ifdef VCZH_DESCRIPTABLEOBJECT_WITH_METADATA
			class XmlTypeLoader : public vl::Object, public ITypeLoader
			{
			public:
				void Load(ITypeManager* manager)
				{
					ADD_TYPE_INFO(vl::parsing::xml::XmlNode)
					ADD_TYPE_INFO(vl::parsing::xml::XmlText)
					ADD_TYPE_INFO(vl::parsing::xml::XmlCData)
					ADD_TYPE_INFO(vl::parsing::xml::XmlAttribute)
					ADD_TYPE_INFO(vl::parsing::xml::XmlComment)
					ADD_TYPE_INFO(vl::parsing::xml::XmlElement)
					ADD_TYPE_INFO(vl::parsing::xml::XmlInstruction)
					ADD_TYPE_INFO(vl::parsing::xml::XmlDocument)
					ADD_TYPE_INFO(vl::parsing::xml::XmlNode::IVisitor)
				}

				void Unload(ITypeManager* manager)
				{
				}
			};
#endif
#endif

			bool XmlLoadTypes()
			{
#ifdef VCZH_DESCRIPTABLEOBJECT_WITH_METADATA
				ITypeManager* manager = GetGlobalTypeManager();
				if(manager)
				{
					auto loader = Ptr(new XmlTypeLoader);
					return manager->AddTypeLoader(loader);
				}
#endif
				return false;
			}
		}
	}
}


/***********************************************************************
.\XML\PARSINGXML_PARSER.CPP
***********************************************************************/
/***********************************************************************
This file is generated by: Vczh Parser Generator
From parser definition:ParsingXml.parser.txt
Licensed under https://github.com/vczh-libraries/License
***********************************************************************/


namespace vl
{
	namespace parsing
	{
		namespace xml
		{
/***********************************************************************
ParserText
***********************************************************************/

const wchar_t* const parserTextBuffer[] = {
  L"" L"\r\n"
, L"//////////////////////////////////////////////////////////////////" L"\r\n"
, L"// AST" L"\r\n"
, L"//////////////////////////////////////////////////////////////////" L"\r\n"
, L"" L"\r\n"
, L"class Node\t\t\t\t\t\t\t\t\t\t@Document(\"Base class of XML nodes.\")" L"\r\n"
, L"{" L"\r\n"
, L"}" L"\r\n"
, L"" L"\r\n"
, L"class Text : Node\t\t\t\t\t\t\t\t@Document(\"Text node.\")" L"\r\n"
, L"{" L"\r\n"
, L"\ttoken content\t\t\t\t\t\t\t\t@Document(\"Content of the text node.\");" L"\r\n"
, L"}" L"\r\n"
, L"" L"\r\n"
, L"class CData : Node\t\t\t\t\t\t\t\t@Document(\"CData node.\")" L"\r\n"
, L"{" L"\r\n"
, L"\ttoken content (XmlUnescapeCData)\t\t\t@Document(\"Content of the cdata node\");" L"\r\n"
, L"}" L"\r\n"
, L"" L"\r\n"
, L"class Attribute : Node\t\t\t\t\t\t\t@Document(\"Attribute node.\")" L"\r\n"
, L"{" L"\r\n"
, L"\ttoken name\t\t\t\t\t\t\t\t\t@Document(\"Attribute name.\"), @Color(\"AttName\");" L"\r\n"
, L"\ttoken value (XmlUnescapeAttributeValue)\t\t@Document(\"Attribute value.\"), @Color(\"AttValue\");" L"\r\n"
, L"}" L"\r\n"
, L"" L"\r\n"
, L"class Comment : Node\t\t\t\t\t\t\t@Document(\"Comment node.\")" L"\r\n"
, L"{" L"\r\n"
, L"\ttoken content (XmlUnescapeComment)\t\t\t@Document(\"Content of the comment node.\");" L"\r\n"
, L"}" L"\r\n"
, L"" L"\r\n"
, L"class Element : Node\t\t\t\t\t\t\t@Document(\"Element node.\")" L"\r\n"
, L"{" L"\r\n"
, L"\ttoken name\t\t\t\t\t\t\t\t\t@Document(\"Element name of the open element node.\"), @Color(\"TagName\");" L"\r\n"
, L"\ttoken closingName\t\t\t\t\t\t\t@Document(\"(Optional): Element name of the closing element node. The name is ignored when serializing XML to text.\"), @Color(\"TagName\");" L"\r\n"
, L"\tAttribute[] attributes\t\t\t\t\t\t@Document(\"Attributes of the element.\");" L"\r\n"
, L"\tNode[] subNodes (XmlMergeTextFragment)\t\t@Document(\"Sub nodes for element nodes, text nodes, cdata nodes and comment nodes.\");" L"\r\n"
, L"}" L"\r\n"
, L"" L"\r\n"
, L"class Instruction : Node\t\t\t\t\t\t@Document(\"Instruction node.\")" L"\r\n"
, L"{" L"\r\n"
, L"\ttoken name\t\t\t\t\t\t\t\t\t@Document(\"Name of the instruction.\"), @Color(\"TagName\");" L"\r\n"
, L"\tAttribute[] attributes\t\t\t\t\t\t@Document(\"Attributes of the instruction.\");" L"\r\n"
, L"}" L"\r\n"
, L"" L"\r\n"
, L"class Document : Node\t\t\t\t\t\t\t@Document(\"XML document node.\")" L"\r\n"
, L"{" L"\r\n"
, L"\tNode[] prologs\t\t\t\t\t\t\t\t@Document(\"Prologue nodes, for instructions and comments.\");" L"\r\n"
, L"\tElement rootElement\t\t\t\t\t\t\t@Document(\"Root element of the XML document.\");" L"\r\n"
, L"}" L"\r\n"
, L"" L"\r\n"
, L"//////////////////////////////////////////////////////////////////" L"\r\n"
, L"// Lexer" L"\r\n"
, L"//////////////////////////////////////////////////////////////////" L"\r\n"
, L"" L"\r\n"
, L"token INSTRUCTION_OPEN = \"/</?\"\t\t\t@Color(\"Boundary\");" L"\r\n"
, L"token INSTRUCTION_CLOSE = \"/?/>\"\t\t@Color(\"Boundary\");" L"\r\n"
, L"token COMPLEX_ELEMENT_OPEN = \"/<//\"\t\t@Color(\"Boundary\");" L"\r\n"
, L"token SINGLE_ELEMENT_CLOSE = \"///>\"\t\t@Color(\"Boundary\");" L"\r\n"
, L"token ELEMENT_OPEN = \"/<\"\t\t\t\t@Color(\"Boundary\");" L"\r\n"
, L"token ELEMENT_CLOSE = \"/>\"\t\t\t\t@Color(\"Boundary\");" L"\r\n"
, L"token EQUAL = \"/=\";" L"\r\n"
, L"" L"\r\n"
, L"token NAME = \"[a-zA-Z0-9:._/-]+\"\t\t\t\t\t\t\t\t@ContextColor();" L"\r\n"
, L"token ATTVALUE = \"\"\"[^<>\"\"]*\"\"|\'[^<>\']*\'\"\t\t\t\t\t\t@ContextColor();" L"\r\n"
, L"token COMMENT = \"/</!--([^/->]|-[^/->]|--[^>])*--/>\"\t\t\t@Color(\"Comment\");" L"\r\n"
, L"token CDATA = \"/</!/[CDATA/[([^/]]|/][^/]]|/]/][^>])*/]/]/>\";" L"\r\n"
, L"token TEXT = \"([^<>=\"\"\' /r/n/ta-zA-Z0-9:._/-])+|\"\"|\'\";" L"\r\n"
, L"" L"\r\n"
, L"discardtoken SPACE = \"/s+\";" L"\r\n"
, L"" L"\r\n"
, L"//////////////////////////////////////////////////////////////////" L"\r\n"
, L"// Rules" L"\r\n"
, L"//////////////////////////////////////////////////////////////////" L"\r\n"
, L"" L"\r\n"
, L"rule Attribute XAttribute = NAME:name \"=\" ATTVALUE:value as Attribute;" L"\r\n"
, L"rule Text XText = (NAME:content | EQUAL:content | ATTVALUE:content | TEXT:content) as Text;" L"\r\n"
, L"rule CData XCData = CDATA:content as CData;" L"\r\n"
, L"rule Comment XComment = COMMENT:content as Comment;" L"\r\n"
, L"rule Element XElement = \"<\" NAME:name {XAttribute:attributes} (\"/>\" | \">\" {XSubNode:subNodes} \"</\" NAME:closingName \">\") as Element;" L"\r\n"
, L"rule Node XSubNode = !XText | !XCData | !XComment | !XElement;" L"\r\n"
, L"rule Instruction XInstruction = \"<?\" NAME:name {XAttribute:attributes} \"?>\" as Instruction;" L"\r\n"
, L"rule Document XDocument = {XInstruction:prologs | XComment:prologs} XElement:rootElement as Document;" L"\r\n"
};
const vint lengthTextBuffer[] = {
  2, 68, 8, 68, 2, 59, 3, 3, 2, 50, 3, 63, 3, 2, 52, 3, 77, 3, 2, 59, 3, 70, 94, 3, 2, 55, 3, 82, 3, 2, 55, 3
, 93, 163, 71, 128, 3, 2, 62, 3, 79, 75, 3, 2, 61, 3, 85, 76, 3, 2, 68, 10, 68, 2, 55, 55, 58, 58, 50, 51, 21, 2, 58, 65
, 75, 63, 56, 2, 29, 2, 68, 10, 68, 2, 72, 93, 45, 53, 134, 64, 93, 103
};
const vint lengthTextBufferTotal = 3474;

			vl::WString XmlGetParserTextBuffer()
			{
				vl::collections::Array<wchar_t> textBuffer(lengthTextBufferTotal + 1);
				wchar_t* reading = &textBuffer[0];
				for(vint i = 0; i < sizeof(parserTextBuffer) / sizeof(*parserTextBuffer); i++)
				{
					memcpy(reading, parserTextBuffer[i], lengthTextBuffer[i] * sizeof(wchar_t));
					reading += lengthTextBuffer[i];
				}
				*reading = 0;
				return &textBuffer[0];
			}

/***********************************************************************
SerializedTable
***********************************************************************/

const vint parserBufferLength = 5096; // 20987 bytes before compressing
const vint parserBufferBlock = 1024;
const vint parserBufferRemain = 1000;
const vint parserBufferRows = 5;
const char* const parserBuffer[] = {
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};

			void XmlGetParserBuffer(vl::stream::MemoryStream& stream)
			{
				vl::stream::MemoryStream compressedStream;
				for (vint i = 0; i < parserBufferRows; i++)
				{
					vint size = i == parserBufferRows - 1 ? parserBufferRemain : parserBufferBlock;
					compressedStream.Write((void*)parserBuffer[i], size);
				}
				compressedStream.SeekFromBegin(0);
				vl::stream::LzwDecoder decoder;
				vl::stream::DecoderStream decoderStream(compressedStream, decoder);
				vl::collections::Array<vl::vuint8_t> buffer(65536);
				while (true)
				{
					vl::vint size = decoderStream.Read(&buffer[0], 65536);
					if (size == 0) break;
					stream.Write(&buffer[0], size);
				}
				stream.SeekFromBegin(0);
			}
/***********************************************************************
Unescaping Function Foward Declarations
***********************************************************************/

			extern void XmlMergeTextFragment(vl::collections::List<vl::Ptr<XmlNode>>& value, const vl::collections::List<vl::regex::RegexToken>& tokens);
			extern void XmlUnescapeAttributeValue(vl::parsing::ParsingToken& value, const vl::collections::List<vl::regex::RegexToken>& tokens);
			extern void XmlUnescapeCData(vl::parsing::ParsingToken& value, const vl::collections::List<vl::regex::RegexToken>& tokens);
			extern void XmlUnescapeComment(vl::parsing::ParsingToken& value, const vl::collections::List<vl::regex::RegexToken>& tokens);

/***********************************************************************
Parsing Tree Conversion Driver Implementation
***********************************************************************/

			class XmlTreeConverter : public vl::parsing::ParsingTreeConverter
			{
			public:
				using vl::parsing::ParsingTreeConverter::SetMember;

				void Fill(vl::Ptr<XmlNode> tree, vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)
				{
				}

				void Fill(vl::Ptr<XmlText> tree, vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)
				{
					SetMember(tree->content, obj->GetMember(L"content"), tokens);
				}

				void Fill(vl::Ptr<XmlCData> tree, vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)
				{
					if(SetMember(tree->content, obj->GetMember(L"content"), tokens))
					{
						XmlUnescapeCData(tree->content, tokens);
					}
				}

				void Fill(vl::Ptr<XmlAttribute> tree, vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)
				{
					SetMember(tree->name, obj->GetMember(L"name"), tokens);
					if(SetMember(tree->value, obj->GetMember(L"value"), tokens))
					{
						XmlUnescapeAttributeValue(tree->value, tokens);
					}
				}

				void Fill(vl::Ptr<XmlComment> tree, vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)
				{
					if(SetMember(tree->content, obj->GetMember(L"content"), tokens))
					{
						XmlUnescapeComment(tree->content, tokens);
					}
				}

				void Fill(vl::Ptr<XmlElement> tree, vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)
				{
					SetMember(tree->name, obj->GetMember(L"name"), tokens);
					SetMember(tree->closingName, obj->GetMember(L"closingName"), tokens);
					SetMember(tree->attributes, obj->GetMember(L"attributes"), tokens);
					if(SetMember(tree->subNodes, obj->GetMember(L"subNodes"), tokens))
					{
						XmlMergeTextFragment(tree->subNodes, tokens);
					}
				}

				void Fill(vl::Ptr<XmlInstruction> tree, vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)
				{
					SetMember(tree->name, obj->GetMember(L"name"), tokens);
					SetMember(tree->attributes, obj->GetMember(L"attributes"), tokens);
				}

				void Fill(vl::Ptr<XmlDocument> tree, vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)
				{
					SetMember(tree->prologs, obj->GetMember(L"prologs"), tokens);
					SetMember(tree->rootElement, obj->GetMember(L"rootElement"), tokens);
				}

				vl::Ptr<vl::parsing::ParsingTreeCustomBase> ConvertClass(vl::Ptr<vl::parsing::ParsingTreeObject> obj, const TokenList& tokens)override
				{
					if(obj->GetType() == L"Text")
					{
						auto tree = vl::Ptr(new XmlText);
						vl::collections::CopyFrom(tree->creatorRules, obj->GetCreatorRules());
						Fill(tree, obj, tokens);
						Fill(tree.Cast<XmlNode>(), obj, tokens);
						return tree;
					}
					else if(obj->GetType() == L"CData")
					{
						auto tree = vl::Ptr(new XmlCData);
						vl::collections::CopyFrom(tree->creatorRules, obj->GetCreatorRules());
						Fill(tree, obj, tokens);
						Fill(tree.Cast<XmlNode>(), obj, tokens);
						return tree;
					}
					else if(obj->GetType() == L"Attribute")
					{
						auto tree = vl::Ptr(new XmlAttribute);
						vl::collections::CopyFrom(tree->creatorRules, obj->GetCreatorRules());
						Fill(tree, obj, tokens);
						Fill(tree.Cast<XmlNode>(), obj, tokens);
						return tree;
					}
					else if(obj->GetType() == L"Comment")
					{
						auto tree = vl::Ptr(new XmlComment);
						vl::collections::CopyFrom(tree->creatorRules, obj->GetCreatorRules());
						Fill(tree, obj, tokens);
						Fill(tree.Cast<XmlNode>(), obj, tokens);
						return tree;
					}
					else if(obj->GetType() == L"Element")
					{
						auto tree = vl::Ptr(new XmlElement);
						vl::collections::CopyFrom(tree->creatorRules, obj->GetCreatorRules());
						Fill(tree, obj, tokens);
						Fill(tree.Cast<XmlNode>(), obj, tokens);
						return tree;
					}
					else if(obj->GetType() == L"Instruction")
					{
						auto tree = vl::Ptr(new XmlInstruction);
						vl::collections::CopyFrom(tree->creatorRules, obj->GetCreatorRules());
						Fill(tree, obj, tokens);
						Fill(tree.Cast<XmlNode>(), obj, tokens);
						return tree;
					}
					else if(obj->GetType() == L"Document")
					{
						auto tree = vl::Ptr(new XmlDocument);
						vl::collections::CopyFrom(tree->creatorRules, obj->GetCreatorRules());
						Fill(tree, obj, tokens);
						Fill(tree.Cast<XmlNode>(), obj, tokens);
						return tree;
					}
					else 
						return 0;
				}
			};

			vl::Ptr<vl::parsing::ParsingTreeCustomBase> XmlConvertParsingTreeNode(vl::Ptr<vl::parsing::ParsingTreeNode> node, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				XmlTreeConverter converter;
				vl::Ptr<vl::parsing::ParsingTreeCustomBase> tree;
				converter.SetMember(tree, node, tokens);
				return tree;
			}

/***********************************************************************
Parsing Tree Conversion Implementation
***********************************************************************/

			vl::Ptr<XmlText> XmlText::Convert(vl::Ptr<vl::parsing::ParsingTreeNode> node, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				return XmlConvertParsingTreeNode(node, tokens).Cast<XmlText>();
			}

			vl::Ptr<XmlCData> XmlCData::Convert(vl::Ptr<vl::parsing::ParsingTreeNode> node, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				return XmlConvertParsingTreeNode(node, tokens).Cast<XmlCData>();
			}

			vl::Ptr<XmlAttribute> XmlAttribute::Convert(vl::Ptr<vl::parsing::ParsingTreeNode> node, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				return XmlConvertParsingTreeNode(node, tokens).Cast<XmlAttribute>();
			}

			vl::Ptr<XmlComment> XmlComment::Convert(vl::Ptr<vl::parsing::ParsingTreeNode> node, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				return XmlConvertParsingTreeNode(node, tokens).Cast<XmlComment>();
			}

			vl::Ptr<XmlElement> XmlElement::Convert(vl::Ptr<vl::parsing::ParsingTreeNode> node, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				return XmlConvertParsingTreeNode(node, tokens).Cast<XmlElement>();
			}

			vl::Ptr<XmlInstruction> XmlInstruction::Convert(vl::Ptr<vl::parsing::ParsingTreeNode> node, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				return XmlConvertParsingTreeNode(node, tokens).Cast<XmlInstruction>();
			}

			vl::Ptr<XmlDocument> XmlDocument::Convert(vl::Ptr<vl::parsing::ParsingTreeNode> node, const vl::collections::List<vl::regex::RegexToken>& tokens)
			{
				return XmlConvertParsingTreeNode(node, tokens).Cast<XmlDocument>();
			}

/***********************************************************************
Parser Function
***********************************************************************/

			vl::Ptr<vl::parsing::ParsingTreeNode> XmlParseDocumentAsParsingTreeNode(const vl::WString& input, vl::Ptr<vl::parsing::tabling::ParsingTable> table, vl::collections::List<vl::Ptr<vl::parsing::ParsingError>>& errors, vl::vint codeIndex)
			{
				vl::parsing::tabling::ParsingState state(input, table, codeIndex);
				state.Reset(L"XDocument");
				vl::Ptr<vl::parsing::tabling::ParsingGeneralParser> parser=vl::parsing::tabling::CreateStrictParser(table);
				vl::Ptr<vl::parsing::ParsingTreeNode> node=parser->Parse(state, errors);
				return node;
			}

			vl::Ptr<vl::parsing::ParsingTreeNode> XmlParseDocumentAsParsingTreeNode(const vl::WString& input, vl::Ptr<vl::parsing::tabling::ParsingTable> table, vl::vint codeIndex)
			{
				vl::collections::List<vl::Ptr<vl::parsing::ParsingError>> errors;
				return XmlParseDocumentAsParsingTreeNode(input, table, errors, codeIndex);
			}

			vl::Ptr<XmlDocument> XmlParseDocument(const vl::WString& input, vl::Ptr<vl::parsing::tabling::ParsingTable> table, vl::collections::List<vl::Ptr<vl::parsing::ParsingError>>& errors, vl::vint codeIndex)
			{
				vl::parsing::tabling::ParsingState state(input, table, codeIndex);
				state.Reset(L"XDocument");
				vl::Ptr<vl::parsing::tabling::ParsingGeneralParser> parser=vl::parsing::tabling::CreateStrictParser(table);
				vl::Ptr<vl::parsing::ParsingTreeNode> node=parser->Parse(state, errors);
				if(node && errors.Count()==0)
				{
					return XmlConvertParsingTreeNode(node, state.GetTokens()).Cast<XmlDocument>();
				}
				return 0;
			}

			vl::Ptr<XmlDocument> XmlParseDocument(const vl::WString& input, vl::Ptr<vl::parsing::tabling::ParsingTable> table, vl::vint codeIndex)
			{
				vl::collections::List<vl::Ptr<vl::parsing::ParsingError>> errors;
				return XmlParseDocument(input, table, errors, codeIndex);
			}

			vl::Ptr<vl::parsing::ParsingTreeNode> XmlParseElementAsParsingTreeNode(const vl::WString& input, vl::Ptr<vl::parsing::tabling::ParsingTable> table, vl::collections::List<vl::Ptr<vl::parsing::ParsingError>>& errors, vl::vint codeIndex)
			{
				vl::parsing::tabling::ParsingState state(input, table, codeIndex);
				state.Reset(L"XElement");
				vl::Ptr<vl::parsing::tabling::ParsingGeneralParser> parser=vl::parsing::tabling::CreateStrictParser(table);
				vl::Ptr<vl::parsing::ParsingTreeNode> node=parser->Parse(state, errors);
				return node;
			}

			vl::Ptr<vl::parsing::ParsingTreeNode> XmlParseElementAsParsingTreeNode(const vl::WString& input, vl::Ptr<vl::parsing::tabling::ParsingTable> table, vl::vint codeIndex)
			{
				vl::collections::List<vl::Ptr<vl::parsing::ParsingError>> errors;
				return XmlParseElementAsParsingTreeNode(input, table, errors, codeIndex);
			}

			vl::Ptr<XmlElement> XmlParseElement(const vl::WString& input, vl::Ptr<vl::parsing::tabling::ParsingTable> table, vl::collections::List<vl::Ptr<vl::parsing::ParsingError>>& errors, vl::vint codeIndex)
			{
				vl::parsing::tabling::ParsingState state(input, table, codeIndex);
				state.Reset(L"XElement");
				vl::Ptr<vl::parsing::tabling::ParsingGeneralParser> parser=vl::parsing::tabling::CreateStrictParser(table);
				vl::Ptr<vl::parsing::ParsingTreeNode> node=parser->Parse(state, errors);
				if(node && errors.Count()==0)
				{
					return XmlConvertParsingTreeNode(node, state.GetTokens()).Cast<XmlElement>();
				}
				return 0;
			}

			vl::Ptr<XmlElement> XmlParseElement(const vl::WString& input, vl::Ptr<vl::parsing::tabling::ParsingTable> table, vl::vint codeIndex)
			{
				vl::collections::List<vl::Ptr<vl::parsing::ParsingError>> errors;
				return XmlParseElement(input, table, errors, codeIndex);
			}

/***********************************************************************
Table Generation
***********************************************************************/

			vl::Ptr<vl::parsing::tabling::ParsingTable> XmlLoadTable()
			{
				vl::stream::MemoryStream stream;
				XmlGetParserBuffer(stream);
				auto table = vl::Ptr(new vl::parsing::tabling::ParsingTable(stream));
				table->Initialize();
				return table;
			}

		}
	}
}