gcc/testsuite/gcc.dg/declspec-4.c

   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 *-*-* } 24 } */
  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 *-*-* } 30 } */
  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 *-*-* } 32 } */
  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 *-*-* } 34 } */
  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 *-*-* } 36 } */
  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 *-*-* } 40 } */
  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 *-*-* } 42 } */