clang/test/Preprocessor/extension-warning.c

   1 // RUN: %clang_cc1 -fsyntax-only -verify -pedantic %s
   2
   3 // The preprocessor shouldn't warn about extensions within macro bodies that
   4 // aren't expanded.
   5 #define TY typeof
   6 #define TY1 typeof(1)
   7
   8 // But we should warn here
   9 TY1 x; // expected-warning {{extension}}
  10 TY(1) x; // FIXME: And we should warn here
  11
  12 // Note: this warning intentionally doesn't trigger on keywords like
  13 // __attribute; the standard allows implementation-defined extensions
  14 // prefixed with "__".
  15 // Current list of keywords this can trigger on:
  16 // inline, restrict, asm, typeof, _asm
  17
  18 void whatever(void) {}