jx_match.h

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/*
Copyright (C) 2016- The University of Notre Dame
This software is distributed under the GNU General Public License.
See the file COPYING for details.
*/

#ifndef JX_MATCH_H
#define JX_MATCH_H

#include "jx.h"

#ifndef JX_ANY
#define JX_ANY -1
#endif

/*
 * Macro to test if we're using a GNU C compiler of a specific vintage
 * or later, for e.g. features that appeared in a particular version
 * of GNU C.  Usage:
 *
 * #if __GNUC_PREREQ__(major, minor)
 * ...cool feature...
 * #else
 * ...delete feature...
 * #endif
 */
#ifndef __GNUC_PREREQ__
#ifdef __GNUC__
#define __GNUC_PREREQ__(x, y) \
        ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \
         (__GNUC__ > (x)))
#else
#define __GNUC_PREREQ__(x, y) 0
#endif
#endif

#ifndef __wur
#if __GNUC_PREREQ__(3, 4)
#define __wur __attribute__((warn_unused_result))
#else
#define __wur
#endif
#endif

#ifndef __sentinel
#if __GNUC_PREREQ__(4, 0)
#define __sentinel __attribute__((sentinel))
#else
#define __sentinel
#endif
#endif

int jx_match_boolean(struct jx *j, int *v) __wur;

int jx_match_integer(struct jx *j, jx_int_t *v) __wur;

int jx_match_double(struct jx *j, double *v) __wur;

int jx_match_string(struct jx *j, char **v) __wur;

int jx_match_symbol(struct jx *j, char **v) __wur;

int jx_match_array(struct jx *j, ...) __wur __sentinel;

#endif