clang/test/Preprocessor/static_assert-already-defined.c

   1 // RUN: %clang_cc1 -DFIRST_WAY -E -dM %s | FileCheck --strict-whitespace %s
   2 // RUN: %clang_cc1 -DFIRST_WAY -fms-compatibility -E -dM %s | FileCheck --strict-whitespace %s
   3 // RUN: %clang_cc1 -E -dM %s | FileCheck --strict-whitespace %s
   4 // RUN: %clang_cc1 -fms-compatibility -E -dM %s | FileCheck --strict-whitespace %s
   5
   6 // If the assert macro is defined in MS compatibility mode in C, we
   7 // automatically inject a macro definition for static_assert. Test that the
   8 // macro is not added if there is already a definition of static_assert to
   9 // ensure that we don't re-define the macro in the event the Microsoft assert.h
  10 // header starts to define the macro some day (or the user defined their own
  11 // macro with the same name). Test that the order of the macro definitions does
  12 // not matter to the behavior.
  13
  14 #ifdef FIRST_WAY
  15 #define static_assert 12
  16 #define assert
  17 #else
  18 #define assert
  19 #define static_assert 12
  20 #endif
  21
  22 CHECK: #define static_assert 12
  23