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/* { dg-options "-std=gnu89" } */

/* In GNU C mode, we recognize the anonymous struct/union extension,

   but not Microsoft extensions.  */

struct A { char a; };

/* MS extension.  */

struct B {

  struct A;                     /* { dg-warning "does not declare anything" } */

  char b;

};

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

/* MS extension.  */

struct C {

  struct D { char d; };         /* { dg-warning "does not declare anything" } */

  char c;

};

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

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

/* GNU extension.  */

struct E {

  struct { char z; };

  char e;

};

char testE[sizeof(struct E) == 2 * sizeof(struct A) ? 1 : -1];

/* MS extension.  */

typedef struct A typedef_A;

struct F {

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

  char f;

};

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

/* Test that __extension__ does the right thing coming _from_ GNU C mode.  */

__extension__ struct G {

  struct { char z; };

  char g;

};

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

struct H {

  struct { char z; };

  char h;

};

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