1 /* Copyright (C) 1995, 1996, 2000, 2001, 2006, 2008 Free Software Foundation, Inc.
3 * This library is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU Lesser General Public
5 * License as published by the Free Software Foundation; either
6 * version 2.1 of the License, or (at your option) any later version.
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * Lesser General Public License for more details.
13 * You should have received a copy of the GNU Lesser General Public
14 * License along with this library; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libguile/_scm.h"
26 #include "libguile/validate.h"
27 #include "libguile/boolean.h"
28 #include "libguile/lang.h"
29 #include "libguile/tags.h"
34 SCM_DEFINE (scm_not, "not", 1, 0, 0,
36 "Return @code{#t} iff @var{x} is @code{#f}, else return @code{#f}.")
37 #define FUNC_NAME s_scm_not
39 return scm_from_bool (scm_is_false (x) || SCM_NILP (x));
44 SCM_DEFINE (scm_boolean_p, "boolean?", 1, 0, 0,
46 "Return @code{#t} iff @var{obj} is either @code{#t} or @code{#f}.")
47 #define FUNC_NAME s_scm_boolean_p
49 return scm_from_bool (scm_is_bool (obj) || SCM_NILP (obj));
56 return scm_is_eq (x, SCM_BOOL_F) || scm_is_eq (x, SCM_BOOL_T);
62 if (scm_is_eq (x, SCM_BOOL_F))
64 else if (scm_is_eq (x, SCM_BOOL_T))
67 scm_wrong_type_arg (NULL, 0, x);
73 #include "libguile/boolean.x"