gcc/testsuite/gcc.dg/bitfld-1.c

   1 /* Copyright (C) 2002 Free Software Foundation, Inc.
   2
   3    Tests various diagnostics about a bit-field's type and width.
   4
   5    Source: Neil Booth, 26 Jan 2002.
   6 */
   7
   8 /* { dg-options "-pedantic -std=gnu89" } */
   9
  10 enum foo {e1 = 0, e2, e3, e4, e5};
  11
  12 int x;
  13 typedef unsigned int ui;
  14
  15 struct bf1
  16 {
  17   unsigned int a: 3.5;          /* { dg-error "integer constant" } */
  18   unsigned int b: x;            /* { dg-error "integer constant" } */
  19   unsigned int c: -1;           /* { dg-error "negative width" } */
  20   unsigned int d: 0;            /* { dg-error "zero width" } */
  21   unsigned int : 0;             /* { dg-bogus "zero width" } */
  22   unsigned int : 5;
  23   double e: 1;                  /* { dg-error "invalid type" } */
  24   float f: 1;                   /* { dg-error "invalid type" } */
  25   unsigned long g: 5;           /* { dg-warning "GCC extension|ISO C" } */
  26   ui h: 5;
  27   enum foo i: 2;                /* { dg-warning "narrower" } */
  28     /* { dg-warning "GCC extension|ISO C" "extension" { target *-*-* } .-1 } */
  29   enum foo j: 3;                /* { dg-warning "GCC extension|ISO C" } */
  30   unsigned int k: 256;          /* { dg-error "exceeds its type" } */
  31 };