[Patch] Add C11 uchar/wchar related __STDC_* definitions

[Richard Smith]

Is this change correct when targeting Windows?

On Sun, May 26, 2013 at 3:52 AM, Ed Schouten <ed at 80386.nl> wrote:

> Hi Dmitri,
>
> 2013/5/25 Dmitri Gribenko <gribozavr at gmail.com>:
> > Please add tests.  (Tests for these macros should probably go into
> > test/Preprocessor/init.c).
>
> Added! (Please refresh)
>
> http://80386.nl/pub/clang-c11-uchar.txt
>
> > Should this be conditional on C11 or C++11?
>
> Though these definitions are only part of C11/C++11, I think it would
> be safer to just define them unconditionally. For example, a piece of
> code assumes C11, but is not built with -std=c11, it may wrongly
> assume !defined(__STDC_MB_MIGHT_NEQ_WC__), which could have disastrous
> side-effects.
>
> --
> Ed Schouten <ed at 80386.nl>
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