clang/test/Preprocessor/macro-reserved.c

   1 // RUN: %clang_cc1 -fsyntax-only -pedantic -verify %s
   2
   3 #define for 0    // expected-warning {{keyword is hidden by macro definition}}
   4 #define final 1
   5 #define __HAVE_X 0
   6 #define __cplusplus
   7 #define _HAVE_X 0
   8 #define X__Y
   9 #define __STDC__ 1 // expected-warning {{redefining builtin macro}}
  10 #define __clang__ 1
  11
  12 #undef for
  13 #undef final
  14 #undef __HAVE_X
  15 #undef __cplusplus
  16 #undef _HAVE_X
  17 #undef X__Y
  18 #undef __STDC_HOSTED__ // expected-warning {{undefining builtin macro}}
  19 #undef __INT32_TYPE__
  20 #undef __UINT32_TYPE__
  21 #undef __UINTPTR_TYPE__
  22 #undef __UINT64_TYPE__
  23 #undef __INT64_TYPE__
  24 #undef __OPTIMIZE__
  25
  26 // allowlisted definitions
  27 #define while while
  28 #define const
  29 #define static
  30 #define extern
  31 #define inline
  32
  33 #undef while
  34 #undef const
  35 #undef static
  36 #undef extern
  37 #undef inline
  38
  39 #define inline __inline
  40 #undef  inline
  41 #define inline __inline__
  42 #undef  inline
  43
  44 #define inline inline__  // expected-warning {{keyword is hidden by macro definition}}
  45 #undef  inline
  46 #define extern __inline  // expected-warning {{keyword is hidden by macro definition}}
  47 #undef  extern
  48 #define extern __extern  // expected-warning {{keyword is hidden by macro definition}}
  49 #undef  extern
  50 #define extern __extern__ // expected-warning {{keyword is hidden by macro definition}}
  51 #undef  extern
  52
  53 #define inline _inline   // expected-warning {{keyword is hidden by macro definition}}
  54 #undef  inline
  55 #define volatile   // expected-warning {{keyword is hidden by macro definition}}
  56 #undef  volatile
  57
  58 #pragma clang diagnostic warning "-Wreserved-macro-identifier"
  59
  60 #define switch if  // expected-warning {{keyword is hidden by macro definition}}
  61 #define final 1
  62 #define __clusplus // expected-warning {{macro name is a reserved identifier}}
  63 #define __HAVE_X 0 // expected-warning {{macro name is a reserved identifier}}
  64 #define _HAVE_X 0  // expected-warning {{macro name is a reserved identifier}}
  65 #define X__Y
  66
  67 #undef switch
  68 #undef final
  69 #undef __cplusplus // expected-warning {{macro name is a reserved identifier}}
  70 #undef _HAVE_X     // expected-warning {{macro name is a reserved identifier}}
  71 #undef X__Y
  72
  73 int x;
  74
  75 #define _GNU_SOURCE          // no-warning
  76 #define __STDC_FORMAT_MACROS // no-warning