gcc/testsuite/gcc.dg/c90-const-expr-1.c

   1 /* Test for constraints on constant expressions.  In C90 it is clear that
   2    certain constructs are not permitted in unevaluated parts of an
   3    expression (except in sizeof); in C99 it might fall within implementation
   4    latitude.
   5 */
   6 /* Origin: Joseph Myers <jsm28@cam.ac.uk>; inspired by
   7    http://deja.com/getdoc.xp?AN=524271595&fmt=text by Peter Seebach.
   8 */
   9 /* { dg-do compile } */
  10 /* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
  11
  12 extern int bar (void);
  13
  14 void
  15 foo (void)
  16 {
  17   int i;
  18   static int j = (1 ? 0 : (i = 2)); /* { dg-error "initial" "assignment" } */
  19   static int k = (1 ? 0 : ++i); /* { dg-error "initial" "increment" } */
  20   static int l = (1 ? 0 : --i); /* { dg-error "initial" "decrement" } */
  21   static int m = (1 ? 0 : bar ()); /* { dg-error "initial" "function call" } */
  22   static int n = (1 ? 0 : (2, 3)); /* { dg-error "initial" "comma" } */
  23 }