Viewing file:  c11-generic-1.c (1.2 KB) -rw-r--r--
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/* Test C11 _Generic. Valid uses. */
/* { dg-do run } */
/* { dg-options "-std=c11 -pedantic-errors" } */
_Noreturn extern void exit (int);
_Noreturn extern void abort (void);
void
check (int n)
{
if (n)
abort ();
}
int
main (void)
{
int n = 0;
check (_Generic (n++, int: 0));
/* _Generic should not evaluate its argument. */
check (n);
check (_Generic (n, double: n++, default: 0));
check (n);
/* Qualifiers are removed for the purpose of type matching. */
const int cn = 0;
check (_Generic (cn, int: 0, default: n++));
check (n);
check (_Generic ((const int) n, int: 0, default: n++));
check (n);
/* Arrays decay to pointers. */
int a[1];
const int ca[1];
check (_Generic (a, int *: 0, const int *: n++));
check (n);
check (_Generic (ca, const int *: 0, int *: n++));
check (n);
/* Functions decay to pointers. */
extern void f (void);
check (_Generic (f, void (*) (void): 0, default: n++));
check (n);
/* _Noreturn is not part of the function type. */
check (_Generic (&abort, void (*) (void): 0, default: n++));
check (n);
/* Integer promotions do not occur. */
short s;
check (_Generic (s, short: 0, int: n++));
check (n);
exit (0);
}
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