AST Definition

An AST definition consists of multipleEnumandClass. A**@public**can be used before any type definition to make it visible from another AST definition file.

Single line comments are allowed using**//**.

Enum

enum Season
{
    Spring,
    Summer,
    Autumn,
    Winter,
}

Class

class Base
{
    var name : token;
}

class Derived : Base
{
    var season : Season;
    var baseArray : Base[];
}

Inheriting between classes works as other programming languages.

Here are a list of supported field types:

token: vl::glr::ParsingToken
enum type
class type: vl::Ptr<ClassType>
array to class type: vl::collections::List<vl::Ptr<ClassType>>

A**@ambiguouscan be used before a class definition, indicating that any syntax rule of exactly this type is allow to produce results with ambiguity. The type of such rule is rewritten toClassTypeToResolve**, with a member**var candidates : ClassType[];**to store all results that could be produced from the same input. A rule of a sub type to an ambiguous type is not automatically allowed to be ambiguous, but you can explicitly specific the type to make such rule use the ambiguous base type.

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AST Definition

Enum

Class

1.2 KiB

Raw Blame History