clang/test/Preprocessor/if_warning.c

   1 // RUN: %clang_cc1 %s -Eonly -Werror=undef -verify
   2 // RUN: %clang_cc1 %s -Eonly -Werror-undef -verify
   3
   4 extern int x;
   5
   6 #if foo   // expected-error {{'foo' is not defined, evaluates to 0}}
   7 #endif
   8
   9 #ifdef foo
  10 #endif
  11
  12 #if defined(foo)
  13 #endif
  14
  15
  16 // PR3938
  17 #if 0
  18 #ifdef D
  19 #else 1       // Should not warn due to C99 6.10p4
  20 #endif
  21 #endif
  22
  23 // rdar://9475098
  24 #if 0
  25 #else 1   // expected-warning {{extra tokens}}
  26 #endif
  27
  28 // PR6852
  29 #if 'somesillylongthing'  // expected-warning {{character constant too long for its type}} \
  30                           // expected-warning {{multi-character character constant}}
  31 #endif