gcc/testsuite/gcc.dg/wtr-union-init-3.c

   1 /* Test for -Wtraditional warnings on union initialization.
   2    Note, gcc should omit these warnings in system header files.
   3    By Kaveh R. Ghazi <ghazi@caip.rutgers.edu> 9/11/2000.  */
   4 /* { dg-do compile } */
   5 /* { dg-options "-Wtraditional" } */
   6
   7 struct bar
   8 {
   9   int i;
  10   long j;
  11 };
  12
  13 union foo
  14 {
  15   struct bar b;
  16   int i;
  17   long l;
  18 };
  19
  20 union foo2
  21 {
  22   int i;
  23   long l;
  24 };
  25
  26 struct baz
  27 {
  28   int a;
  29   double b;
  30   union foo c;
  31 };
  32
  33 struct baz2
  34 {
  35   int a;
  36   double b;
  37   union foo2 c;
  38 };
  39
  40 void
  41 testfunc ()
  42 {
  43   /* Note we only warn for nonzero initializers.  Xfail on substructures. */
  44   static union foo f1 = {{0,0}}; /* { dg-bogus "traditional C rejects initialization of unions" "initialization of unions" { xfail *-*-* } } */
  45   static union foo f2 = {{1,1}}; /* { dg-warning "traditional C rejects initialization of unions" "initialization of unions" } */
  46
  47   static struct baz f3 = { 1, 2, {{0,0}} }; /* { dg-bogus "traditional C rejects initialization of unions" "initialization of unions" { xfail *-*-* } } */
  48   static struct baz f4 = { 1, 2, {{1,1}} }; /* { dg-warning "traditional C rejects initialization of unions" "initialization of unions" } */
  49
  50   static struct baz2 f5 = { 1, 2, {0} };
  51   static struct baz2 f6 = { 1, 2, {1} }; /* { dg-warning "traditional C rejects initialization of unions" "initialization of unions" } */
  52
  53 # 54 "sys-header.h" 3
  54 /* We are in system headers now, no -Wtraditional warnings should issue.  */
  55
  56   static union foo b1 = {{0,0}};
  57   static union foo b2 = {{1,1}};
  58
  59   static struct baz b3 = { 1, 2, {{0,0}} };
  60   static struct baz b4 = { 1, 2, {{1,1}} };
  61
  62   static struct baz2 b5 = { 1, 2, {0} };
  63   static struct baz2 b6 = { 1, 2, {1} };
  64 }