clang/test/Headers/ms-null-ms-header-vs-stddef.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -triple i686-pc-win32 -fms-compatibility -fms-compatibility-version=17.00 %s
   2 // RUN: %clang_cc1 -fsyntax-only -triple i386-mingw32 %s
   3
   4 // Something in MSVC's headers (pulled in e.g. by <crtdefs.h>) defines __null
   5 // to something, mimic that.
   6 #define __null
   7
   8 #include <stddef.h>
   9
  10 // __null is used as a type annotation in MS headers, with __null defined to
  11 // nothing in regular builds. This should continue to work even with stddef.h
  12 // included.
  13 void f(__null void* p) { }
  14
  15 // NULL should work fine even with __null defined to nothing.
  16 void* p = NULL;