Viewing file:  c2x-attr-syntax-3.c (1.59 KB) -rw-r--r--
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/* Test C2x attribute syntax. Invalid uses of attributes. */
/* { dg-do compile } */
/* { dg-options "-std=c2x -pedantic-errors" } */
/* Prefix attributes not allowed on declarations without declarators. */
[[]] struct s { int a; }; /* { dg-error "empty declaration" } */
[[]] union u { int a; }; /* { dg-error "empty declaration" } */
void
f1 (void)
{
[[]] struct t { int a; }; /* { dg-error "empty declaration" } */
}
/* Prefix attributes not allowed on _Static_assert. */
[[]] _Static_assert (1); /* { dg-error "expected" } */
void
f2 (void)
{
[[]] _Static_assert (1); /* { dg-error "expected" } */
}
/* Declarations, including attribute declarations, cannot appear after
labels when a statement is expected. */
void
f3 (void)
{
if (1)
x: [[]]; /* { dg-error "expected" } */
}
/* Prefix attributes cannot appear on type names. */
int z = sizeof ([[]] int); /* { dg-error "expected" } */
/* Attributes are not allowed after struct, union or enum, except when
the type contents are being defined or the declaration is just
"struct-or-union atribute-specifier-sequence identifier;". */
const struct [[]] s2; /* { dg-warning "useless type qualifier" } */
/* { dg-error "invalid use of attributes in empty declaration" "invalid" { target *-*-* } .-1 } */
const union [[]] u2; /* { dg-warning "useless type qualifier" } */
/* { dg-error "invalid use of attributes in empty declaration" "invalid" { target *-*-* } .-1 } */
struct [[]] s3 *sv; /* { dg-error "expected" } */
union [[]] u3 *uv; /* { dg-error "expected" } */
enum e { E1 };
enum [[]] e *ev; /* { dg-error "expected" } */
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