gnu/dist/gcc4/gcc/testsuite/gcc.dg/cpp/c99-if-comma-1.c

   1 /* Test for commas in constant expressions in #if: not permitted in C90
   2    but permitted in unevaluated subexpressions in C99.  */
   3 /* Origin: Joseph Myers <jsm@polyomino.org.uk> */
   4 /* { dg-do preprocess } */
   5 /* { dg-options "-std=iso9899:1999 -pedantic-errors" } */
   6
   7 #if (1, 2) /* { dg-error "comma" "evaluated comma" } */
   8 #endif
   9
  10 #if 1 || (1, 2)
  11 #endif