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53befeb700
(Not quite finished, the following will be done tomorrow. module/srfi/*.scm module/rnrs/*.scm module/scripts/*.scm testsuite/*.scm guile-readline/* )
134 lines
3.4 KiB
C
134 lines
3.4 KiB
C
/* Copyright (C) 1998,1999,2000,2001,2002,2003, 2006, 2008, 2009 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 3 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "libguile/_scm.h"
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#include "libguile/eval.h"
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#include "libguile/fluids.h"
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#include "libguile/modules.h"
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#include "libguile/validate.h"
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#include "libguile/evalext.h"
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SCM_DEFINE (scm_defined_p, "defined?", 1, 1, 0,
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(SCM sym, SCM env),
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"Return @code{#t} if @var{sym} is defined in the lexical "
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"environment @var{env}. When @var{env} is not specified, "
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"look in the top-level environment as defined by the "
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"current module.")
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#define FUNC_NAME s_scm_defined_p
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{
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SCM var;
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SCM_VALIDATE_SYMBOL (1, sym);
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if (SCM_UNBNDP (env))
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var = scm_sym2var (sym, scm_current_module_lookup_closure (),
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SCM_BOOL_F);
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else
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{
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SCM frames = env;
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register SCM b;
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for (; SCM_NIMP (frames); frames = SCM_CDR (frames))
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{
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SCM_ASSERT (scm_is_pair (frames), env, SCM_ARG2, FUNC_NAME);
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b = SCM_CAR (frames);
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if (scm_is_true (scm_procedure_p (b)))
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break;
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SCM_ASSERT (scm_is_pair (b), env, SCM_ARG2, FUNC_NAME);
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for (b = SCM_CAR (b); SCM_NIMP (b); b = SCM_CDR (b))
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{
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if (!scm_is_pair (b))
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{
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if (scm_is_eq (b, sym))
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return SCM_BOOL_T;
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else
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break;
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}
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if (scm_is_eq (SCM_CAR (b), sym))
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return SCM_BOOL_T;
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}
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}
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var = scm_sym2var (sym,
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SCM_NIMP (frames) ? SCM_CAR (frames) : SCM_BOOL_F,
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SCM_BOOL_F);
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}
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return (scm_is_false (var) || SCM_UNBNDP (SCM_VARIABLE_REF (var))
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? SCM_BOOL_F
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: SCM_BOOL_T);
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}
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#undef FUNC_NAME
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SCM_REGISTER_PROC (s_map_in_order, "map-in-order", 2, 0, 1, scm_map);
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SCM_DEFINE (scm_self_evaluating_p, "self-evaluating?", 1, 0, 0,
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(SCM obj),
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"Return #t for objects which Guile considers self-evaluating")
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#define FUNC_NAME s_scm_self_evaluating_p
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{
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switch (SCM_ITAG3 (obj))
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{
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case scm_tc3_int_1:
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case scm_tc3_int_2:
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/* inum */
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return SCM_BOOL_T;
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case scm_tc3_imm24:
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/* characters, booleans, other immediates */
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return scm_from_bool (!scm_is_null (obj));
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case scm_tc3_cons:
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switch (SCM_TYP7 (obj))
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{
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case scm_tcs_closures:
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case scm_tc7_vector:
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case scm_tc7_wvect:
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case scm_tc7_number:
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case scm_tc7_string:
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case scm_tc7_smob:
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case scm_tc7_pws:
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case scm_tcs_subrs:
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case scm_tcs_struct:
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return SCM_BOOL_T;
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default:
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return SCM_BOOL_F;
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}
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}
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SCM_MISC_ERROR ("Internal error: Object ~S has unknown type",
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scm_list_1 (obj));
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return SCM_UNSPECIFIED; /* never reached */
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}
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#undef FUNC_NAME
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void
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scm_init_evalext ()
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{
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#include "libguile/evalext.x"
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}
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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