mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-04-30 20:00:19 +02:00
93f26b7bcc
* psyntax.ss (self-evaluating?): Removed. Guile now provides this operator as a primitive procedure. (build-data): Quote vectors (psyntax.ss requires this).
210 lines
6 KiB
C
210 lines
6 KiB
C
/* Copyright (C) 1998,1999,2000,2001,2002, 2003 Free Software Foundation, Inc.
|
||
*
|
||
* This program is free software; you can redistribute it and/or modify
|
||
* it under the terms of the GNU General Public License as published by
|
||
* the Free Software Foundation; either version 2, or (at your option)
|
||
* any later version.
|
||
*
|
||
* This program is distributed in the hope that it will be useful,
|
||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
* GNU General Public License for more details.
|
||
*
|
||
* You should have received a copy of the GNU General Public License
|
||
* along with this software; see the file COPYING. If not, write to
|
||
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
|
||
* Boston, MA 02111-1307 USA
|
||
*
|
||
* As a special exception, the Free Software Foundation gives permission
|
||
* for additional uses of the text contained in its release of GUILE.
|
||
*
|
||
* The exception is that, if you link the GUILE library with other files
|
||
* to produce an executable, this does not by itself cause the
|
||
* resulting executable to be covered by the GNU General Public License.
|
||
* Your use of that executable is in no way restricted on account of
|
||
* linking the GUILE library code into it.
|
||
*
|
||
* This exception does not however invalidate any other reasons why
|
||
* the executable file might be covered by the GNU General Public License.
|
||
*
|
||
* This exception applies only to the code released by the
|
||
* Free Software Foundation under the name GUILE. If you copy
|
||
* code from other Free Software Foundation releases into a copy of
|
||
* GUILE, as the General Public License permits, the exception does
|
||
* not apply to the code that you add in this way. To avoid misleading
|
||
* anyone as to the status of such modified files, you must delete
|
||
* this exception notice from them.
|
||
*
|
||
* If you write modifications of your own for GUILE, it is your choice
|
||
* whether to permit this exception to apply to your modifications.
|
||
* If you do not wish that, delete this exception notice. */
|
||
|
||
|
||
|
||
|
||
#include "libguile/_scm.h"
|
||
#include "libguile/eval.h"
|
||
#include "libguile/macros.h"
|
||
#include "libguile/modules.h"
|
||
#include "libguile/fluids.h"
|
||
|
||
#include "libguile/validate.h"
|
||
#include "libguile/evalext.h"
|
||
|
||
SCM_SYMBOL (scm_sym_setter, "setter");
|
||
|
||
SCM
|
||
scm_m_generalized_set_x (SCM xorig, SCM env SCM_UNUSED)
|
||
{
|
||
SCM x = SCM_CDR (xorig);
|
||
SCM_ASSYNT (2 == scm_ilength (x), scm_s_expression, scm_s_set_x);
|
||
if (SCM_SYMBOLP (SCM_CAR (x)))
|
||
return scm_cons (SCM_IM_SET_X, x);
|
||
else if (SCM_CONSP (SCM_CAR (x)))
|
||
return scm_cons (scm_list_2 (scm_sym_setter, SCM_CAAR (x)),
|
||
scm_append (scm_list_2 (SCM_CDAR (x), SCM_CDR (x))));
|
||
else
|
||
scm_misc_error (scm_s_set_x, scm_s_variable, SCM_EOL);
|
||
}
|
||
|
||
SCM_DEFINE (scm_defined_p, "defined?", 1, 1, 0,
|
||
(SCM sym, SCM env),
|
||
"Return @code{#t} if @var{sym} is defined in the lexical "
|
||
"environment @var{env}. When @var{env} is not specified, "
|
||
"look in the top-level environment as defined by the "
|
||
"current module.")
|
||
#define FUNC_NAME s_scm_defined_p
|
||
{
|
||
SCM var;
|
||
|
||
SCM_VALIDATE_SYMBOL (1, sym);
|
||
|
||
if (SCM_UNBNDP (env))
|
||
var = scm_sym2var (sym, scm_current_module_lookup_closure (),
|
||
SCM_BOOL_F);
|
||
else
|
||
{
|
||
SCM frames = env;
|
||
register SCM b;
|
||
for (; SCM_NIMP (frames); frames = SCM_CDR (frames))
|
||
{
|
||
SCM_ASSERT (SCM_CONSP (frames), env, SCM_ARG2, FUNC_NAME);
|
||
b = SCM_CAR (frames);
|
||
if (SCM_NFALSEP (scm_procedure_p (b)))
|
||
break;
|
||
SCM_ASSERT (SCM_CONSP (b), env, SCM_ARG2, FUNC_NAME);
|
||
for (b = SCM_CAR (b); SCM_NIMP (b); b = SCM_CDR (b))
|
||
{
|
||
if (SCM_NCONSP (b))
|
||
{
|
||
if (SCM_EQ_P (b, sym))
|
||
return SCM_BOOL_T;
|
||
else
|
||
break;
|
||
}
|
||
if (SCM_EQ_P (SCM_CAR (b), sym))
|
||
return SCM_BOOL_T;
|
||
}
|
||
}
|
||
var = scm_sym2var (sym,
|
||
SCM_NIMP (frames) ? SCM_CAR (frames) : SCM_BOOL_F,
|
||
SCM_BOOL_F);
|
||
}
|
||
|
||
return (SCM_FALSEP (var) || SCM_UNBNDP (SCM_VARIABLE_REF (var))
|
||
? SCM_BOOL_F
|
||
: SCM_BOOL_T);
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
#if (SCM_ENABLE_DEPRECATED == 1)
|
||
|
||
SCM_SYNTAX (s_undefine, "undefine", scm_makacro, scm_m_undefine);
|
||
|
||
SCM
|
||
scm_m_undefine (SCM x, SCM env)
|
||
{
|
||
SCM arg1 = x;
|
||
x = SCM_CDR (x);
|
||
SCM_ASSYNT (SCM_TOP_LEVEL (env), "bad placement ", s_undefine);
|
||
SCM_ASSYNT (SCM_CONSP (x) && SCM_NULLP (SCM_CDR (x)),
|
||
scm_s_expression, s_undefine);
|
||
x = SCM_CAR (x);
|
||
SCM_ASSYNT (SCM_SYMBOLP (x), scm_s_variable, s_undefine);
|
||
arg1 = scm_sym2var (x, scm_env_top_level (env), SCM_BOOL_F);
|
||
SCM_ASSYNT (SCM_NFALSEP (arg1) && !SCM_UNBNDP (SCM_VARIABLE_REF (arg1)),
|
||
"variable already unbound ", s_undefine);
|
||
SCM_VARIABLE_SET (arg1, SCM_UNDEFINED);
|
||
#ifdef SICP
|
||
return x;
|
||
#else
|
||
return SCM_UNSPECIFIED;
|
||
#endif
|
||
}
|
||
|
||
#endif
|
||
|
||
SCM_REGISTER_PROC (s_map_in_order, "map-in-order", 2, 0, 1, scm_map);
|
||
|
||
SCM_DEFINE (scm_self_evaluating_p, "self-evaluating?", 1, 0, 0,
|
||
(SCM obj),
|
||
"Return #t for objects which Guile considers self-evaluating")
|
||
#define FUNC_NAME s_scm_self_evaluating_p
|
||
{
|
||
switch (SCM_ITAG3 (obj))
|
||
{
|
||
case scm_tc3_int_1:
|
||
case scm_tc3_int_2:
|
||
/* inum */
|
||
return SCM_BOOL_T;
|
||
case scm_tc3_imm24:
|
||
/* characters, booleans, other immediates */
|
||
return SCM_BOOL (!SCM_NULLP (obj));
|
||
case scm_tc3_cons:
|
||
switch (SCM_TYP7 (obj))
|
||
{
|
||
case scm_tcs_closures:
|
||
case scm_tc7_vector:
|
||
case scm_tc7_wvect:
|
||
#ifdef HAVE_ARRAYS
|
||
case scm_tc7_bvect:
|
||
case scm_tc7_byvect:
|
||
case scm_tc7_svect:
|
||
case scm_tc7_ivect:
|
||
case scm_tc7_uvect:
|
||
case scm_tc7_fvect:
|
||
case scm_tc7_dvect:
|
||
case scm_tc7_cvect:
|
||
#ifdef HAVE_LONG_LONGS
|
||
case scm_tc7_llvect:
|
||
#endif
|
||
#endif
|
||
case scm_tc7_string:
|
||
case scm_tc7_smob:
|
||
case scm_tc7_cclo:
|
||
case scm_tc7_pws:
|
||
case scm_tcs_subrs:
|
||
case scm_tcs_struct:
|
||
return SCM_BOOL_T;
|
||
default:
|
||
return SCM_BOOL_F;
|
||
}
|
||
}
|
||
SCM_MISC_ERROR ("Internal error: Object ~S has unknown type",
|
||
scm_list_1 (obj));
|
||
return SCM_UNSPECIFIED; /* never reached */
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
void
|
||
scm_init_evalext ()
|
||
{
|
||
scm_make_synt (scm_s_set_x, scm_makmmacro, scm_m_generalized_set_x);
|
||
#include "libguile/evalext.x"
|
||
}
|
||
|
||
/*
|
||
Local Variables:
|
||
c-file-style: "gnu"
|
||
End:
|
||
*/
|