gcc/testsuite/gcc.dg/c23-fordecl-3.c

   1 /* Test for C99 declarations in for loops.  Test constraints are diagnosed with
   2    -Wc11-c23-compat for C23.  Based on c99-fordecl-2.c.  */
   3 /* { dg-do compile } */
   4 /* { dg-options "-std=c23 -pedantic-errors -Wc11-c23-compat" } */
   5
   6 void
   7 foo (void)
   8 {
   9   int j = 0;
  10   for (int i = 1, bar (void); i <= 10; i++) /* { dg-warning "bar" } */
  11     j += i;
  12
  13   for (static int i = 1; i <= 10; i++) /* /* { dg-warning "static" } */
  14     j += i;
  15
  16   for (extern int i; j <= 500; j++) /* { dg-warning "extern" } */
  17     j += 5;
  18
  19   for (enum { FOO } i = FOO; i < 10; i++) /* { dg-warning "FOO" } */
  20     j += i;
  21
  22   for (enum BAR { FOO } i = FOO; i < 10; i++) /* { dg-warning "FOO" } */
  23     /* { dg-warning "BAR" "enum tag in for loop" { target *-*-* } .-1 } */
  24     j += i;
  25   for (typedef int T;;) /* { dg-warning "non-variable" } */
  26     ;
  27 }