/*
 * keyword.h - Public API for Scheme keywords
 *
 *   Copyright (c) 2000-2007  Shiro Kawai  <shiro@acm.org>
 * 
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 * 
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 *   3. Neither the name of the authors nor the names of its contributors
 *      may be used to endorse or promote products derived from this
 *      software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 *   TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  $Id: keyword.h,v 1.2 2007/03/22 11:20:31 shirok Exp $
 */

/* This file is included from gauche.h */

#ifndef GAUCHE_KEYWORD_H
#define GAUCHE_KEYWORD_H

struct ScmKeywordRec {
    SCM_HEADER;
    ScmString *name;
};

SCM_CLASS_DECL(Scm_KeywordClass);
#define SCM_CLASS_KEYWORD       (&Scm_KeywordClass)

#define SCM_KEYWORD(obj)        ((ScmKeyword*)(obj))
#define SCM_KEYWORDP(obj)       SCM_XTYPEP(obj, SCM_CLASS_KEYWORD)
#define SCM_KEYWORD_NAME(obj)   (SCM_KEYWORD(obj)->name)

SCM_EXTERN ScmObj Scm_MakeKeyword(ScmString *name);
SCM_EXTERN ScmObj Scm_GetKeyword(ScmObj key, ScmObj list, ScmObj fallback);
SCM_EXTERN ScmObj Scm_DeleteKeyword(ScmObj key, ScmObj list);
SCM_EXTERN ScmObj Scm_DeleteKeywordX(ScmObj key, ScmObj list);

#define SCM_MAKE_KEYWORD(cstr) \
    Scm_MakeKeyword(SCM_STRING(SCM_MAKE_STR_IMMUTABLE(cstr)))
#define SCM_GET_KEYWORD(cstr, list, fallback) \
    Scm_GetKeyword(SCM_MAKE_KEYWORD(cstr), list, fallback)

#endif /* GAUCHE_KEYWORD_H */

