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/*
Copyright (C) 1994 M. Hagiya, W. Schelter, T. Yuasa
This file is part of GNU Common Lisp, herein referred to as GCL
GCL is free software; you can redistribute it and/or modify it under
the terms of the GNU LIBRARY GENERAL PUBLIC LICENSE as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GCL 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 Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with GCL; see the file COPYING. If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
toplevel.c
Top-Level Forms and Declarations
*/
#include "include.h"
object sLcompile, sLload, sLeval, sKcompile_toplevel, sKload_toplevel, sKexecute;
object sLprogn;
object sLwarn;
object sSAinhibit_macro_specialA;
object sLtypep;
static void
FFN(Fdefun)(object args)
{
object name;
object body, form;
if (endp(args) || endp(MMcdr(args)))
FEtoo_few_argumentsF(args);
if (MMcadr(args) != Cnil && type_of(MMcadr(args)) != t_cons)
FEerror("~S is an illegal lambda-list.", 1, MMcadr(args));
name = MMcar(args);
if (type_of(name) != t_symbol)
not_a_symbol(name);
if (name->s.s_sfdef != NOT_SPECIAL) {
if (name->s.s_mflag) {
if (symbol_value(sSAinhibit_macro_specialA) != Cnil)
name->s.s_sfdef = NOT_SPECIAL;
} else if (symbol_value(sSAinhibit_macro_specialA) != Cnil)
FEerror("~S, a special form, cannot be redefined.", 1, name);
}
if (name->s.s_hpack == lisp_package &&
name->s.s_gfdef != OBJNULL && !raw_image) {
vs_push(make_simple_string(
"~S is being redefined."));
ifuncall2(sLwarn, vs_head, name);
vs_popp;
}
vs_base = vs_top;
if (lex_env[0] == Cnil && lex_env[1] == Cnil && lex_env[2] == Cnil) {
vs_push(MMcons(sLlambda_block, args));
} else {
vs_push(MMcons(lex_env[2], args));
vs_base[0] = MMcons(lex_env[1], vs_base[0]);
vs_base[0] = MMcons(lex_env[0], vs_base[0]);
vs_base[0] = MMcons(sLlambda_block_closure, vs_base[0]);
}
{object fname = clear_compiler_properties(name,vs_base[0]);
fname->s.s_gfdef = vs_base[0];
fname->s.s_mflag = FALSE;}
vs_base[0] = name;
for (body = MMcddr(args); !endp(body); body = body->c.c_cdr) {
form = macro_expand(body->c.c_car);
if (type_of(form) == t_string) {
if (endp(body->c.c_cdr))
break;
vs_push(form);
name->s.s_plist =
putf(name->s.s_plist,
form,
sSfunction_documentation);
vs_popp;
break;
}
if (type_of(form) != t_cons || form->c.c_car != sLdeclare)
break;
}
}
static void
FFN(siLAmake_special)(void)
{
check_arg(1);
check_type_symbol(&vs_base[0]);
if ((enum stype)vs_base[0]->s.s_stype == stp_constant)
FEerror("~S is a constant.", 1, vs_base[0]);
vs_base[0]->s.s_stype = (short)stp_special;
}
static void
FFN(siLAmake_constant)(void)
{
check_arg(2);
check_type_symbol(&vs_base[0]);
if ((enum stype)vs_base[0]->s.s_stype == stp_special)
FEerror(
"The argument ~S to DEFCONSTANT is a special variable.",
1, vs_base[0]);
vs_base[0]->s.s_stype = (short)stp_constant;
vs_base[0]->s.s_dbind = vs_base[1];
vs_popp;
}
static void
FFN(Feval_when)(object arg)
{
object *base = vs_base;
object ss;
bool flag = FALSE;
if(endp(arg))
FEtoo_few_argumentsF(arg);
for (ss = MMcar(arg); !endp(ss); ss = MMcdr(ss))
if(MMcar(ss) == sLeval || (MMcar(ss) == sKexecute) )
flag = TRUE;
else if(MMcar(ss) != sLload && MMcar(ss) != sLcompile &&
MMcar(ss) != sKload_toplevel && MMcar(ss) != sKcompile_toplevel )
FEinvalid_form("~S is an undefined situation for EVAL-WHEN.",
MMcar(ss));
if(flag) {
vs_push(make_cons(sLprogn, MMcdr(arg)));
eval(vs_head);
} else {
vs_base = base;
vs_top = base+1;
vs_base[0] = Cnil;
}
}
static void
FFN(Fload_time_value)(object arg)
{
if(endp(arg))
FEtoo_few_argumentsF(arg);
if(!endp(MMcdr(arg)) && !endp(MMcddr(arg)))
FEtoo_many_argumentsF(arg);
vs_push(MMcar(arg));
eval(vs_head);
}
static void
FFN(Fdeclare)(object arg)
{
FEerror("DECLARE appeared in an invalid position.", 0);
}
static void
FFN(Flocally)(object body)
{
object *oldlex = lex_env;
lex_copy();
body = find_special(body, NULL, NULL);
vs_push(body);
Fprogn(body);
lex_env = oldlex;
}
static void
FFN(Fthe)(object args)
{
object *vs;
if(endp(args) || endp(MMcdr(args)))
FEtoo_few_argumentsF(args);
if(!endp(MMcddr(args)))
FEtoo_many_argumentsF(args);
eval(MMcadr(args));
args = MMcar(args);
if (type_of(args) == t_cons && MMcar(args) == sLvalues) {
vs = vs_base;
for (args=MMcdr(args); !endp(args); args=MMcdr(args), vs++){
if (vs >= vs_top)
FEerror("Too many return values.", 0);
if (ifuncall2(sLtypep, *vs, MMcar(args)) == Cnil)
FEwrong_type_argument(MMcar(args), *vs);
}
if (vs < vs_top)
FEerror("Too few return values.", 0);
} else {
if (ifuncall2(sLtypep, vs_base[0], args) == Cnil)
FEwrong_type_argument(args, vs_base[0]);
}
}
DEF_ORDINARY("LDB",sLldb,LISP,"");
DEF_ORDINARY("LDB-TEST",sLldb_test,LISP,"");
DEF_ORDINARY("DPB",sLdpb,LISP,"");
DEF_ORDINARY("DEPOSIT-FIELD",sLdeposit_field,LISP,"");
DEF_ORDINARY("COMPILE",sLcompile,LISP,"");
DEF_ORDINARY("COMPILE-TOPLEVEL",sKcompile_toplevel,KEYWORD,"");
DEF_ORDINARY("DECLARE",sLdeclare,LISP,"");
DEF_ORDINARY("EVAL",sLeval,LISP,"");
DEF_ORDINARY("EXECUTE",sKexecute,KEYWORD,"");
DEF_ORDINARY("FUNCTION-DOCUMENTATION",sSfunction_documentation,SI,"");
DEF_ORDINARY("LOAD",sLload,LISP,"");
DEF_ORDINARY("LOAD-TOPLEVEL",sKload_toplevel,KEYWORD,"");
DEF_ORDINARY("PROGN",sLprogn,LISP,"");
DEF_ORDINARY("TYPEP",sLtypep,LISP,"");
DEF_ORDINARY("VALUES",sLvalues,LISP,"");
DEF_ORDINARY("VARIABLE-DOCUMENTATION",sSvariable_documentation,SI,"");
DEF_ORDINARY("WARN",sLwarn,LISP,"");
void
gcl_init_toplevel(void)
{
make_special_form("DEFUN",Fdefun);
make_si_function("*MAKE-SPECIAL", siLAmake_special);
make_si_function("*MAKE-CONSTANT", siLAmake_constant);
make_special_form("EVAL-WHEN", Feval_when);
make_special_form("LOAD-TIME-VALUE", Fload_time_value);
make_special_form("THE", Fthe);
sLdeclare=make_special_form("DECLARE",Fdeclare);
make_special_form("LOCALLY",Flocally);
}
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