gcc/testsuite/gcc.dg/cpp/tr-warn2.c

   1 /* K+R rejects use of function-like macros in non-function context.
   2    ANSI C explicitly permits this (the macro is not expanded).
   3
   4    We should not warn about this during pre-expansion of arguments,
   5    since traditional preprocessors don't do pre-expansion, and we get
   6    the warning anyway during the re-scan pass if and only if it is
   7    appropriate.  */
   8
   9 /* { dg-do preprocess } */
  10 /* { dg-options -Wtraditional } */
  11
  12 #define f(x) x
  13 #define g(x) x / 2
  14 #define h(a, b) a(b)
  15 f(g) (3)            /* { dg-bogus "must be used with arguments" } */
  16 f 2                 /* { dg-warning "must be used with arguments" } */
  17 f(g) 3              /* { dg-warning "must be used with arguments" } */
  18 h(f, 3)             /* { dg-bogus "must be used with arguments" } */