1  /* Test declaration specifiers.  Test empty declarations.  Test with
       2     no special options.  */
       3  /* Origin: Joseph Myers <jsm@polyomino.org.uk> */
       4  /* { dg-do compile } */
       5  /* { dg-options "" } */
       6  
       7  /* If a declaration does not declare a declarator, it must declare a
       8     tag or the members of an enumeration, and must only contain one
       9     type specifier.  */
      10  
      11  typedef int T;
      12  
      13  struct s0;
      14  union u0;
      15  enum e0; /* A GNU extension.  */
      16  enum { E0 };
      17  enum e1 { E1 };
      18  
      19  /* Not declaring anything (pedwarns).  */
      20  struct { int a; }; /* { dg-warning "unnamed struct/union that defines no instances" } */
      21  int; /* { dg-warning "useless type name in empty declaration" } */
      22  long; /* { dg-warning "useless type name in empty declaration" } */
      23  T; /* { dg-warning "useless type name in empty declaration" } */
      24  static const; /* { dg-warning "useless storage class specifier in empty declaration" } */
      25  /* { dg-warning "empty declaration" "static const" { target *-*-* } .-1 } */
      26  union { long b; }; /* { dg-warning "unnamed struct/union that defines no instances" } */
      27  
      28  /* Multiple type names (errors).  */
      29  struct s1 int; /* { dg-error "two or more data types in declaration specifiers" } */
      30  char union u1; /* { dg-error "two or more data types in declaration specifiers" } */
      31  /* { dg-warning "useless type name in empty declaration" "char union" { target *-*-* } .-1 } */
      32  double enum { E2 }; /* { dg-error "two or more data types in declaration specifiers" } */
      33  /* { dg-warning "useless type name in empty declaration" "double enum" { target *-*-* } .-1 } */
      34  T struct s2; /* { dg-error "two or more data types in declaration specifiers" } */
      35  /* { dg-warning "useless type name in empty declaration" "T struct" { target *-*-* } .-1 } */
      36  long union u2; /* { dg-error "two or more data types in declaration specifiers" } */
      37  /* { dg-warning "useless type name in empty declaration" "empty" { target *-*-* } .-1 } */
      38  struct s3 short; /* { dg-error "two or more data types in declaration specifiers" } */
      39  union u3 signed; /* { dg-error "two or more data types in declaration specifiers" } */
      40  unsigned struct s4; /* { dg-error "two or more data types in declaration specifiers" } */
      41  /* { dg-warning "useless type name in empty declaration" "empty" { target *-*-* } .-1 } */
      42  _Complex enum { E3 }; /* { dg-error "two or more data types in declaration specifiers" } */
      43  /* { dg-warning "useless type name in empty declaration" "empty" { target *-*-* } .-1 } */