clang/test/Preprocessor/if_warning.c

   1 // RUN: %clang_cc1 %s -Eonly -Werror=undef -verify
   2
   3 extern int x;
   4
   5 #if foo   // expected-error {{'foo' is not defined, evaluates to 0}}
   6 #endif
   7
   8 // expected-warning@+2 {{use of a '#elifdef' directive is a C23 extension}}
   9 #ifdef foo
  10 #elifdef foo
  11 #endif
  12
  13 #if defined(foo)
  14 #endif
  15
  16
  17 // PR3938
  18 // expected-warning@+3 {{use of a '#elifdef' directive is a C23 extension}}
  19 #if 0
  20 #ifdef D
  21 #elifdef D
  22 #else 1       // Should not warn due to C99 6.10p4
  23 #endif
  24 #endif
  25
  26 #if 0
  27 #else 1   // expected-warning {{extra tokens}}
  28 #endif
  29
  30 // PR6852
  31 #if 'somesillylongthing'  // expected-warning {{character constant too long for its type}} \
  32                           // expected-warning {{multi-character character constant}}
  33 #endif