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Lucas De Marchi
7ba6f92eb5
Now that most places in the code use the ARRAY_SIZE macro instead of
coding it by hand, let's use some type safety in its definition. This is
a C++ version of similar macros used in kmod, Linux kernel and the
source of them, ccan.
A C++ version like this is used in V8 (the JS engine) and other open
source projects.
The main benefit of this version is that you get a compile error if you
pass in a variable that's not an array. For example,
Bla y[10];
Bla *y_ptr = y;
void foo(Bla x[])
{
// build error since x[] decay to a pointer in function
// parameter
for (int i = 0; i < ARRAY_SIZE(x); i++) {
...
}
// build error since y_ptr is not an array
for (int i = 0; i < ARRAY_SIZE(y_ptr); i++) {
...
}
}
I added the additional specialization to allow arrays of size 0.