gcc/testsuite/gcc.dg/nested-redef-1.c

   1 /* Test diagnosis of nested tag redefinitions.  */
   2 /* Origin: Joseph Myers <jsm@polyomino.org.uk> */
   3 /* { dg-do compile } */
   4 /* { dg-options "" } */
   5
   6 struct s0 {
   7   struct s0 { int a; } x; /* { dg-error "nested redefinition of 'struct s0'" } */
   8 };
   9
  10 struct s1 {
  11   const struct s1 { int b; } x; /* { dg-error "nested redefinition of 'struct s1'" } */
  12 };
  13
  14 struct s2 {
  15   struct s2 { int c; } *x; /* { dg-error "nested redefinition of 'struct s2'" } */
  16 };
  17
  18 struct s3 {
  19   struct s4 {
  20     struct s5 {
  21       struct s3 { int a; } **x; /* { dg-error "nested redefinition of 'struct s3'" } */
  22     } y;
  23   } z;
  24 };
  25
  26 struct s6;
  27 struct s6 { struct s6 *p; };
  28
  29 union u0 {
  30   union u0 { int c; } *x; /* { dg-error "nested redefinition of 'union u0'" } */
  31 };
  32
  33 enum e0 {
  34   E0 = sizeof(enum e0 { E1 }) /* { dg-error "nested redefinition of 'enum e0'" } */
  35 };
  36
  37 enum e1 {
  38   E2 = sizeof(enum e2 { E2 }), /* { dg-error "redeclaration of enumerator 'E2'" } */
  39   /* { dg-message "note: previous definition" "previous E2" { target *-*-* } .-1 } */
  40   E3
  41 };
  42
  43 enum e3;
  44 enum e3 { E4 = 0 };