mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-05-20 11:40:18 +02:00
* evalext.c, evalext.h: New files. Contain non-R5RS things
having to do with evaluation. * evalext.c (serial-map): New procedure: Version of `map' which guarantees that the procedure is applied to the lists in serial order. (sequence->list): New syntax: Version of `begin' which returns a list of the results of the body forms instead of the result of the last body form. (scm_definedp, scm_m_undefine): Moved from eval.c * evalext.h (scm_m_sequence_to_list): Added declaration. * Makefile.am: Added evalext.c, evalext.h, macros.c, macros.h.
This commit is contained in:
Mikael Djurfeldt
parent
d41b3904a1
commit
40cf7e92b2
2 changed files with 180 additions and 0 deletions
124
libguile/evalext.c
Normal file
124
libguile/evalext.c
Normal file
|
|
@ -0,0 +1,124 @@
|
|||
/* Copyright (C) 1998 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 "_scm.h"
|
||||
#include "eval.h"
|
||||
#include "macros.h"
|
||||
|
||||
#include "evalext.h"
|
||||
|
||||
SCM_PROC (s_definedp, "defined?", 1, 0, 0, scm_definedp);
|
||||
|
||||
SCM
|
||||
scm_definedp (sym)
|
||||
SCM sym;
|
||||
{
|
||||
SCM vcell;
|
||||
|
||||
if (SCM_ISYMP (sym))
|
||||
return SCM_BOOL_T;
|
||||
|
||||
SCM_ASSERT (SCM_NIMP (sym) && SCM_SYMBOLP (sym), sym, SCM_ARG1, s_definedp);
|
||||
|
||||
vcell = scm_sym2vcell(sym,
|
||||
SCM_CDR (scm_top_level_lookup_closure_var),
|
||||
SCM_BOOL_F);
|
||||
return (vcell == SCM_BOOL_F || SCM_UNBNDP(SCM_CDR(vcell))) ?
|
||||
SCM_BOOL_F : SCM_BOOL_T;
|
||||
}
|
||||
|
||||
static char s_undefine[] = "undefine";
|
||||
|
||||
SCM
|
||||
scm_m_undefine (x, env)
|
||||
SCM x, env;
|
||||
{
|
||||
SCM arg1 = x;
|
||||
x = SCM_CDR (x);
|
||||
SCM_ASSYNT (SCM_TOP_LEVEL (env), arg1, "bad placement ", s_undefine);
|
||||
SCM_ASSYNT (SCM_NIMP (x) && SCM_CONSP (x) && SCM_CDR (x) == SCM_EOL,
|
||||
arg1, scm_s_expression, s_undefine);
|
||||
x = SCM_CAR (x);
|
||||
SCM_ASSYNT (SCM_NIMP (x) && SCM_SYMBOLP (x), arg1, scm_s_variable, s_undefine);
|
||||
arg1 = scm_sym2vcell (x, scm_env_top_level (env), SCM_BOOL_F);
|
||||
SCM_ASSYNT (SCM_NFALSEP (arg1) && !SCM_UNBNDP (SCM_CDR (arg1)),
|
||||
x, "variable already unbound ", s_undefine);
|
||||
#if 0
|
||||
#ifndef SCM_RECKLESS
|
||||
if (SCM_NIMP (SCM_CDR (arg1)) && ((SCM) SCM_SNAME (SCM_CDR (arg1)) == x))
|
||||
scm_warn ("undefining built-in ", SCM_CHARS (x));
|
||||
else
|
||||
#endif
|
||||
if (5 <= scm_verbose && SCM_UNDEFINED != SCM_CDR (arg1))
|
||||
scm_warn ("redefining ", SCM_CHARS (x));
|
||||
#endif
|
||||
SCM_SETCDR (arg1, SCM_UNDEFINED);
|
||||
#ifdef SICP
|
||||
return SCM_CAR (arg1);
|
||||
#else
|
||||
return SCM_UNSPECIFIED;
|
||||
#endif
|
||||
}
|
||||
|
||||
static char s_sequence_to_list[] = "sequence->list";
|
||||
|
||||
SCM
|
||||
scm_m_sequence_to_list (SCM x, SCM env)
|
||||
{
|
||||
SCM res = SCM_EOL;
|
||||
SCM_ASSYNT (SCM_NULLP (SCM_CDR (x))
|
||||
|| (SCM_NIMP (SCM_CDR (x) && SCM_ECONSP (SCM_CDR (x)))),
|
||||
x, scm_s_expression, s_sequence_to_list);
|
||||
while (SCM_NNULLP (x = SCM_CDR (x)))
|
||||
res = scm_cons (SCM_XEVALCAR (x, env), res);
|
||||
return res;
|
||||
}
|
||||
|
||||
SCM_PROC (s_serial_map, "serial-map", 2, 0, 1, scm_map);
|
||||
|
||||
void
|
||||
scm_init_evalext ()
|
||||
{
|
||||
scm_make_synt (s_undefine, scm_makacro, scm_m_undefine);
|
||||
scm_make_synt (s_sequence_to_list, scm_makacro, scm_m_sequence_to_list);
|
||||
#include "evalext.x"
|
||||
}
|
||||
56
libguile/evalext.h
Normal file
56
libguile/evalext.h
Normal file
|
|
@ -0,0 +1,56 @@
|
|||
/* classes: h_files */
|
||||
|
||||
#ifndef EVALEXTH
|
||||
#define EVALEXTH
|
||||
/* Copyright (C) 1998 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"
|
||||
|
||||
|
||||
|
||||
extern SCM scm_definedp SCM_P ((SCM sym));
|
||||
extern SCM scm_m_undefine SCM_P ((SCM x, SCM env));
|
||||
extern SCM scm_m_sequence_to_list SCM_P ((SCM x, SCM env));
|
||||
extern void scm_init_evalext SCM_P ((void));
|
||||
|
||||
#endif /* EVALEXTH */
|
||||
Loading…
Add table
Add a link
Reference in a new issue