blob: 58fafdb2e14d75f19a66c82b1eb71695903ccc5d [file] [log] [blame]
/* Test C11 _Noreturn. Test valid code using stdnoreturn.h. */
/* { dg-do run } */
/* { dg-options "-std=c11 -pedantic-errors" } */
#include <stdnoreturn.h>
extern int strcmp (const char *, const char *);
noreturn void exit (int);
noreturn void abort (void);
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 *-*-* } .-1 } */
}
noreturn void
f5 (void)
{
return; /* { dg-warning "has a 'return' statement" } */
/* { dg-warning "does return" "second warning" { target *-*-* } .-1 } */
}
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;
#ifndef noreturn
#error "noreturn not defined"
#endif
#define str(x) #x
#define xstr(x) str(x)
const char *s = xstr(noreturn);
int
main (void)
{
if (strcmp (s, "_Noreturn") != 0)
abort ();
exit (0);
}