1
/* Copyright (C) 1998,1999,2000,2001,2002,2003, 2006 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
21
#include "libguile/_scm.h"
22
#include "libguile/eval.h"
23
#include "libguile/fluids.h"
24
#include "libguile/modules.h"
26
#include "libguile/validate.h"
27
#include "libguile/evalext.h"
29
SCM_DEFINE (scm_defined_p, "defined?", 1, 1, 0,
31
"Return @code{#t} if @var{sym} is defined in the lexical "
32
"environment @var{env}. When @var{env} is not specified, "
33
"look in the top-level environment as defined by the "
35
#define FUNC_NAME s_scm_defined_p
39
SCM_VALIDATE_SYMBOL (1, sym);
42
var = scm_sym2var (sym, scm_current_module_lookup_closure (),
48
for (; SCM_NIMP (frames); frames = SCM_CDR (frames))
50
SCM_ASSERT (scm_is_pair (frames), env, SCM_ARG2, FUNC_NAME);
52
if (scm_is_true (scm_procedure_p (b)))
54
SCM_ASSERT (scm_is_pair (b), env, SCM_ARG2, FUNC_NAME);
55
for (b = SCM_CAR (b); SCM_NIMP (b); b = SCM_CDR (b))
59
if (scm_is_eq (b, sym))
64
if (scm_is_eq (SCM_CAR (b), sym))
68
var = scm_sym2var (sym,
69
SCM_NIMP (frames) ? SCM_CAR (frames) : SCM_BOOL_F,
73
return (scm_is_false (var) || SCM_UNBNDP (SCM_VARIABLE_REF (var))
80
SCM_REGISTER_PROC (s_map_in_order, "map-in-order", 2, 0, 1, scm_map);
83
SCM_DEFINE (scm_self_evaluating_p, "self-evaluating?", 1, 0, 0,
85
"Return #t for objects which Guile considers self-evaluating")
86
#define FUNC_NAME s_scm_self_evaluating_p
88
switch (SCM_ITAG3 (obj))
95
/* characters, booleans, other immediates */
96
return scm_from_bool (!scm_is_null (obj));
98
switch (SCM_TYP7 (obj))
100
case scm_tcs_closures:
115
SCM_MISC_ERROR ("Internal error: Object ~S has unknown type",
117
return SCM_UNSPECIFIED; /* never reached */
124
#include "libguile/evalext.x"