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/* Macro for checking that a function declaration is compliant.
Copyright (C) 2009-2011 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef SIGNATURE_CHECK
/* Check that the function FN takes the specified arguments ARGS with
a return type of RET. This header is designed to be included after
<config.h> and the one system header that is supposed to contain
the function being checked, but prior to any other system headers
that are necessary for the unit test. Therefore, this file does
not include any system headers, nor reference anything outside of
the macro arguments. For an example, if foo.h should provide:
extern int foo (char, float);
then the unit test named test-foo.c would start out with:
#include <config.h>
#include <foo.h>
#include "signature.h"
SIGNATURE_CHECK (foo, int, (char, float));
#include <other.h>
...
*/
# define SIGNATURE_CHECK(fn, ret, args) \
SIGNATURE_CHECK1 (fn, ret, args, __LINE__)
/* Necessary to allow multiple SIGNATURE_CHECK lines in a unit test.
Note that the checks must not occupy the same line. */
# define SIGNATURE_CHECK1(fn, ret, args, id) \
SIGNATURE_CHECK2 (fn, ret, args, id) /* macroexpand line */
# define SIGNATURE_CHECK2(fn, ret, args, id) \
static ret (* _GL_UNUSED signature_check ## id) args = fn
#endif /* SIGNATURE_CHECK */

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