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/* Test bsearch const-generic macro.
Copyright (C) 2025-2026 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <stdlib.h>
#include <libc-diag.h>
void *vp;
const void *cvp;
int *ip;
const int *cip;
size_t sz;
int (*compar) (const void *, const void *);
#define CHECK_TYPE(EXPR, TYPE) \
_Static_assert (_Generic (EXPR, TYPE: 1), "type check")
static int
do_test (void)
{
/* This is a compilation test. */
CHECK_TYPE (bsearch (cvp, cvp, sz, sz, compar), const void *);
CHECK_TYPE (bsearch (cvp, vp, sz, sz, compar), void *);
CHECK_TYPE (bsearch (vp, cvp, sz, sz, compar), const void *);
CHECK_TYPE (bsearch (vp, vp, sz, sz, compar), void *);
CHECK_TYPE (bsearch (cvp, cip, sz, sz, compar), const void *);
CHECK_TYPE (bsearch (cvp, ip, sz, sz, compar), void *);
CHECK_TYPE (bsearch (vp, cip, sz, sz, compar), const void *);
CHECK_TYPE (bsearch (vp, ip, sz, sz, compar), void *);
DIAG_PUSH_NEEDS_COMMENT;
/* This deliberately tests the type of the result with a null
pointer constant argument. */
DIAG_IGNORE_NEEDS_COMMENT (14, "-Wnonnull");
CHECK_TYPE (bsearch (cvp, 0, sz, sz, compar), void *);
CHECK_TYPE (bsearch (cvp, (void *) 0, sz, sz, compar), void *);
DIAG_POP_NEEDS_COMMENT;
CHECK_TYPE ((bsearch) (cvp, cvp, sz, sz, compar), void *);
return 0;
}
#include <support/test-driver.c>
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