__SIZE_TYPE__ and friends out of specs

[Zack Weinberg]

On Tue, May 14, 2002 at 05:59:29PM +0100, Neil Booth wrote:
> Zack Weinberg wrote:-
> 
> > +  /* stddef.h needs to know these.  */
> > +  builtin_define_with_value ("__SIZE_TYPE__", SIZE_TYPE);
> > +  builtin_define_with_value ("__PTRDIFF_TYPE__", PTRDIFF_TYPE);
> > +  builtin_define_with_value ("__WCHAR_TYPE__", WCHAR_TYPE);
> > +  builtin_define_with_value ("__WINT_TYPE__", WINT_TYPE);
> 
> Two more nits.  I think the WCHAR one is best done as follows:
> 
>   builtin_define_with_value ("__WCHAR_TYPE__",
>   			     IDENTIFIER_POINTER (wchar_type_node));

It is slightly hairier than that...

    builtin_define_with_value ("__WCHAR_TYPE__",
      ({ tree name = TYPE_NAME (wchar_type_node);
         if (TREE_CODE (name) == TYPE_DECL) name = DECL_NAME (name);
	 IDENTIFIER_POINTER (name); }));

(yes, I know I can't use this notation)  and for consistency they
should all be done that way.  Or, hrm, I could define a new macro to
wrap around WCHAR_TYPE that takes -fshort-wchar into account.  Neither
approach seems great to me.  Thoughts?

> Also, would you poison the removed macros?

Done in my copy.

zw