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/* Test C11 _Noreturn. Test valid code. */
/* { dg-do compile } */
/* { dg-options "-std=c11 -pedantic-errors" } */
_Noreturn void exit (int);
_Noreturn int f1 (void);
_Noreturn void f2 (void);
static void _Noreturn f3 (void) { exit (0); }
/* Returning from a noreturn function is undefined at runtime, not a
constraint violation, but recommended practice is to diagnose if
such a return appears possible. */
_Noreturn int
f4 (void)
{
return 1; /* { dg-warning "has a 'return' statement" } */
/* { dg-warning "does return" "second warning" { target *-*-* } 20 } */
}
_Noreturn void
f5 (void)
{
return; /* { dg-warning "has a 'return' statement" } */
/* { dg-warning "does return" "second warning" { target *-*-* } 27 } */
}
_Noreturn void
f6 (void)
{
} /* { dg-warning "does return" } */
_Noreturn void
f7 (int a)
{
if (a)
exit (0);
} /* { dg-warning "does return" } */
/* Declarations need not all have _Noreturn. */
void f2 (void);
void f8 (void);
_Noreturn void f8 (void);
/* Duplicate _Noreturn is OK. */
_Noreturn _Noreturn void _Noreturn f9 (void);
/* _Noreturn does not affect type compatibility. */
void (*fp) (void) = f5;
/* noreturn is an ordinary identifier. */
int noreturn;
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