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/* Copyright (C) 1995,1996,1997,1998 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 "smob.h"
#include "macros.h"
long scm_tc16_macro;
SCM_PROC(s_makacro, "procedure->syntax", 1, 0, 0, scm_makacro);
SCM
scm_makacro (code)
SCM code;
{
SCM_ASSERT (SCM_NFALSEP (scm_procedure_p (code)),
code, SCM_ARG1, s_makacro);
SCM_RETURN_NEWSMOB (scm_tc16_macro, code);
}
SCM_PROC(s_makmacro, "procedure->macro", 1, 0, 0, scm_makmacro);
SCM
scm_makmacro (code)
SCM code;
{
SCM_ASSERT (SCM_NFALSEP (scm_procedure_p (code)),
code, SCM_ARG1, s_makmacro);
SCM_RETURN_NEWSMOB (scm_tc16_macro | (1L << 16), code);
}
SCM_PROC(s_makmmacro, "procedure->memoizing-macro", 1, 0, 0, scm_makmmacro);
SCM
scm_makmmacro (code)
SCM code;
{
SCM_ASSERT (SCM_NFALSEP (scm_procedure_p (code)),
code, SCM_ARG1, s_makmmacro);
SCM_RETURN_NEWSMOB (scm_tc16_macro | (2L << 16), code);
}
SCM_PROC (s_macro_p, "macro?", 1, 0, 0, scm_macro_p);
SCM
scm_macro_p (obj)
SCM obj;
{
return (SCM_NIMP (obj) && SCM_TYP16 (obj) == scm_tc16_macro
? SCM_BOOL_T
: SCM_BOOL_F);
}
SCM_SYMBOL (scm_sym_syntax, "syntax");
SCM_SYMBOL (scm_sym_macro, "macro");
SCM_SYMBOL (scm_sym_mmacro, "macro!");
SCM_PROC (s_macro_type, "macro-type", 1, 0, 0, scm_macro_type);
SCM
scm_macro_type (m)
SCM m;
{
if (!(SCM_NIMP (m) && SCM_TYP16 (m) == scm_tc16_macro))
return SCM_BOOL_F;
switch ((int) (SCM_CAR (m) >> 16))
{
case 0: return scm_sym_syntax;
case 1: return scm_sym_macro;
case 2: return scm_sym_mmacro;
default: scm_wrong_type_arg (s_macro_type, 1, m);
}
}
SCM_PROC (s_macro_name, "macro-name", 1, 0, 0, scm_macro_name);
SCM
scm_macro_name (m)
SCM m;
{
SCM_ASSERT (SCM_NIMP (m) && SCM_TYP16 (m) == scm_tc16_macro,
m,
SCM_ARG1,
s_macro_name);
return scm_procedure_name (SCM_CDR (m));
}
SCM_PROC (s_macro_transformer, "macro-transformer", 1, 0, 0, scm_macro_transformer);
SCM
scm_macro_transformer (m)
SCM m;
{
SCM_ASSERT (SCM_NIMP (m) && SCM_TYP16 (m) == scm_tc16_macro,
m,
SCM_ARG1,
s_macro_transformer);
return SCM_CLOSUREP (SCM_CDR (m)) ? SCM_CDR (m) : SCM_BOOL_F;
}
SCM
scm_make_synt (name, macroizer, fcn)
const char *name;
SCM (*macroizer) ();
SCM (*fcn) ();
{
SCM symcell = scm_sysintern (name, SCM_UNDEFINED);
long tmp = ((((SCM_CELLPTR) (SCM_CAR (symcell))) - scm_heap_org) << 8);
register SCM z;
if ((tmp >> 8) != ((SCM_CELLPTR) (SCM_CAR (symcell)) - scm_heap_org))
tmp = 0;
SCM_NEWCELL (z);
SCM_SUBRF (z) = fcn;
SCM_SETCAR (z, tmp + scm_tc7_subr_2);
SCM_SETCDR (symcell, macroizer (z));
return SCM_CAR (symcell);
}
void
scm_init_macros ()
{
scm_tc16_macro = scm_make_smob_type_mfpe ("macro", 0,
scm_markcdr, NULL, NULL, NULL);
#include "macros.x"
}
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