stddef.h, [C++] wchar_t vs size_t

[Artem Khodush]

> 
> What's up with the wchar_t type definition when using the c++ compiler?
> 
> ginclude/stddef.h has typedefs for
> 
> typedef __SIZE_TYPE__ size_t;
> typedef __PTRDIFF_TYPE__ ptrdiff_t;
> 
> yet
> 
> #ifndef __cplusplus
> typedef __WCHAR_TYPE__ wchar_t;
> #endif
> 
> Can somebody please explain why this is so? Why should wchar_t be a

Because for c++, wchar_t is builtin, I guess. 
(at least, there is wchar_type_node in c-decl.c).

Best regards,
Artem.