clang/test/Preprocessor/pragma_poison.c

   1 // RUN: %clang_cc1 %s -Eonly -verify
   2
   3 #pragma GCC poison rindex
   4 rindex(some_string, 'h');   // expected-error {{attempt to use a poisoned identifier}}
   5
   6 #define BAR _Pragma ("GCC poison XYZW")  XYZW /*NO ERROR*/
   7   XYZW      // ok
   8 BAR
   9   XYZW      // expected-error {{attempt to use a poisoned identifier}}
  10
  11 // Pragma poison shouldn't warn from macro expansions defined before the token
  12 // is poisoned.
  13
  14 #define strrchr rindex2
  15 #pragma GCC poison rindex2
  16
  17 // Can poison multiple times.
  18 #pragma GCC poison rindex2
  19
  20 strrchr(some_string, 'h');   // ok.