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
  10 #undef for
  11 #undef final
  12 #undef __HAVE_X
  13 #undef __cplusplus
  14 #undef _HAVE_X
  15 #undef X__Y
  16
  17 // allowlisted definitions
  18 #define while while
  19 #define const
  20 #define static
  21 #define extern
  22 #define inline
  23
  24 #undef while
  25 #undef const
  26 #undef static
  27 #undef extern
  28 #undef inline
  29
  30 #define inline __inline
  31 #undef  inline
  32 #define inline __inline__
  33 #undef  inline
  34
  35 #define inline inline__  // expected-warning {{keyword is hidden by macro definition}}
  36 #undef  inline
  37 #define extern __inline  // expected-warning {{keyword is hidden by macro definition}}
  38 #undef  extern
  39 #define extern __extern  // expected-warning {{keyword is hidden by macro definition}}
  40 #undef  extern
  41 #define extern __extern__ // expected-warning {{keyword is hidden by macro definition}}
  42 #undef  extern
  43
  44 #define inline _inline   // expected-warning {{keyword is hidden by macro definition}}
  45 #undef  inline
  46 #define volatile   // expected-warning {{keyword is hidden by macro definition}}
  47 #undef  volatile
  48
  49 #pragma clang diagnostic warning "-Wreserved-macro-identifier"
  50
  51 #define switch if  // expected-warning {{keyword is hidden by macro definition}}
  52 #define final 1
  53 #define __clusplus // expected-warning {{macro name is a reserved identifier}}
  54 #define __HAVE_X 0 // expected-warning {{macro name is a reserved identifier}}
  55 #define _HAVE_X 0  // expected-warning {{macro name is a reserved identifier}}
  56 #define X__Y
  57
  58 #undef switch
  59 #undef final
  60 #undef __cplusplus // expected-warning {{macro name is a reserved identifier}}
  61 #undef _HAVE_X     // expected-warning {{macro name is a reserved identifier}}
  62 #undef X__Y
  63
  64 int x;
  65
  66 #define _GNU_SOURCE          // no-warning
  67 #define __STDC_FORMAT_MACROS // no-warning