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/* { dg-options "-ansi -pedantic -pedantic-errors" } */

/* In strict ISO C++ mode, we don't recognize the anonymous struct

   extension or any Microsoft C extensions.  */

struct A { char a; };

struct B {

  struct A;                     /* forward decl of B::A.  */

  char b;

};

char testB[sizeof(B) == sizeof(A) ? 1 : -1];

struct C {

  struct D { char d; };         /* decl of C::D.  */

  char c;

};

char testC[sizeof(C) == sizeof(A) ? 1 : -1];

char testD[sizeof(C::D) == sizeof(A) ? 1 : -1];

/* GNU extension.  */

struct E {

  struct { char z; };           /* { dg-error "prohibits anonymous structs" } */

  char e;

};

typedef struct A typedef_A;

struct F {

  typedef_A;                    /* { dg-error "does not declare anything" } */

  char f;

};

char testF[sizeof(struct F) == sizeof(struct A) ? 1 : -1];

/* __extension__ enables GNU C mode for the duration of the declaration.  */

__extension__ struct G {

  struct { char z; };

  char g;

};

char testG[sizeof(G) == 2 * sizeof(A) ? 1 : -1];

struct H {

  __extension__ struct { char z; };

  char h;

};

char testH[sizeof(H) == 2 * sizeof(A) ? 1 : -1];

/* Make sure __extension__ gets turned back off.  */

struct I {

  struct { char z; };           /* { dg-error "prohibits anonymous structs" } */

  char i;

};