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bab9804661
* libguile/snarf.h (SCM_SYNTAX): Remove snarf macro, users can't define primitive syntax any more. * libguile/memoize.c (SCM_SYNTAX): Define locally, and just call scm_i_makbimacro as there's no difference between that and scm_makmmacro. Alter invocations to suit. * libguile/macros.h: * libguile/macros.c (scm_i_makmmacro): Remove; users can't define primitive syntax any more. Use define-syntax instead. (scm_make_synt): Remove, this was only used by the SCM_SYNTAX snarf macro. (scm_i_makbimacro): Change prototype of this internal function to make the gsubr on behalf of the caller. (macro_print, scm_macro_type): Remove cases for mmacros.
237 lines
6.3 KiB
C
237 lines
6.3 KiB
C
/* Copyright (C) 1995,1996,1997,1998,2000,2001,2002,2003, 2006, 2008, 2009, 2010 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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#define SCM_BUILDING_DEPRECATED_CODE
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#include "libguile/_scm.h"
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#include "libguile/alist.h" /* for SCM_EXTEND_ENV (well...) */
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#include "libguile/eval.h"
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#include "libguile/ports.h"
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#include "libguile/print.h"
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#include "libguile/root.h"
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#include "libguile/smob.h"
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#include "libguile/deprecation.h"
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#include "libguile/validate.h"
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#include "libguile/programs.h"
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#include "libguile/macros.h"
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#include "libguile/private-options.h"
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scm_t_bits scm_tc16_macro;
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static int
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macro_print (SCM macro, SCM port, scm_print_state *pstate)
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{
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SCM code = SCM_MACRO_CODE (macro);
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scm_puts ("#<", port);
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if (SCM_MACRO_TYPE (macro) < 4 && SCM_MACRO_IS_EXTENDED (macro))
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scm_puts ("extended-", port);
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/* FIXME: doesn't catch boot closures; but do we care? */
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if (!SCM_PROGRAM_P (code))
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scm_puts ("primitive-", port);
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if (SCM_MACRO_TYPE (macro) == 3)
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scm_puts ("builtin-macro!", port);
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if (SCM_MACRO_TYPE (macro) == 4)
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scm_puts ("syncase-macro", port);
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scm_putc (' ', port);
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scm_iprin1 (scm_macro_name (macro), port, pstate);
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if (SCM_MACRO_IS_EXTENDED (macro))
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{
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scm_putc (' ', port);
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scm_write (SCM_SMOB_OBJECT_2 (macro), port);
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scm_putc (' ', port);
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scm_write (SCM_SMOB_OBJECT_3 (macro), port);
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}
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scm_putc ('>', port);
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return 1;
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}
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static SCM
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makmac (SCM code, scm_t_bits flags)
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{
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SCM z;
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SCM_NEWSMOB (z, scm_tc16_macro, SCM_UNPACK (code));
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SCM_SET_SMOB_FLAGS (z, flags);
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return z;
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}
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/* Return a mmacro that is known to be one of guile's built in macros. */
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SCM
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scm_i_makbimacro (const char *name, SCM (*fn)(SCM, SCM))
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{
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return makmac (scm_c_make_gsubr (name, 2, 0, 0, fn), 3);
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}
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SCM_DEFINE (scm_make_syncase_macro, "make-syncase-macro", 2, 0, 0,
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(SCM type, SCM binding),
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"Return a @dfn{macro} that requires expansion by syntax-case.\n"
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"While users should not call this function, it is useful to know\n"
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"that syntax-case macros are represented as Guile primitive macros.")
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#define FUNC_NAME s_scm_make_syncase_macro
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{
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SCM z;
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SCM_VALIDATE_SYMBOL (1, type);
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SCM_NEWSMOB3 (z, scm_tc16_macro, SCM_UNPACK (binding), SCM_UNPACK (type),
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SCM_UNPACK (binding));
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SCM_SET_SMOB_FLAGS (z, 4 | SCM_F_MACRO_EXTENDED);
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return z;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_make_extended_syncase_macro, "make-extended-syncase-macro", 3, 0, 0,
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(SCM m, SCM type, SCM binding),
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"Extend a core macro @var{m} with a syntax-case binding.")
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#define FUNC_NAME s_scm_make_extended_syncase_macro
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{
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SCM z;
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SCM_VALIDATE_SMOB (1, m, macro);
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SCM_VALIDATE_SYMBOL (2, type);
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SCM_NEWSMOB3 (z, scm_tc16_macro, SCM_SMOB_DATA (m), SCM_UNPACK (type),
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SCM_UNPACK (binding));
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SCM_SET_SMOB_FLAGS (z, SCM_SMOB_FLAGS (m) | SCM_F_MACRO_EXTENDED);
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return z;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_macro_p, "macro?", 1, 0, 0,
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(SCM obj),
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"Return @code{#t} if @var{obj} is a regular macro, a memoizing macro, a\n"
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"syntax transformer, or a syntax-case macro.")
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#define FUNC_NAME s_scm_macro_p
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{
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return scm_from_bool (SCM_SMOB_PREDICATE (scm_tc16_macro, obj));
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}
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#undef FUNC_NAME
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SCM_SYMBOL (scm_sym_bimacro, "builtin-macro!");
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SCM_SYMBOL (scm_sym_syncase_macro, "syncase-macro");
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SCM_DEFINE (scm_macro_type, "macro-type", 1, 0, 0,
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(SCM m),
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"Return one of the symbols @code{syntax}, @code{macro},\n"
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"@code{macro!}, or @code{syntax-case}, depending on whether\n"
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"@var{m} is a syntax transformer, a regular macro, a memoizing\n"
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"macro, or a syntax-case macro, respectively. If @var{m} is\n"
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"not a macro, @code{#f} is returned.")
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#define FUNC_NAME s_scm_macro_type
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{
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if (!SCM_SMOB_PREDICATE (scm_tc16_macro, m))
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return SCM_BOOL_F;
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switch (SCM_MACRO_TYPE (m))
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{
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case 3: return scm_sym_bimacro;
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case 4: return scm_sym_syncase_macro;
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default: scm_wrong_type_arg (FUNC_NAME, 1, m);
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}
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_macro_name, "macro-name", 1, 0, 0,
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(SCM m),
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"Return the name of the macro @var{m}.")
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#define FUNC_NAME s_scm_macro_name
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{
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SCM_VALIDATE_SMOB (1, m, macro);
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if (scm_is_true (scm_procedure_p (SCM_SMOB_OBJECT (m))))
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return scm_procedure_name (SCM_SMOB_OBJECT (m));
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return SCM_BOOL_F;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_macro_transformer, "macro-transformer", 1, 0, 0,
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(SCM m),
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"Return the transformer of the macro @var{m}.")
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#define FUNC_NAME s_scm_macro_transformer
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{
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SCM data;
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SCM_VALIDATE_SMOB (1, m, macro);
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data = SCM_PACK (SCM_SMOB_DATA (m));
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if (scm_is_true (scm_procedure_p (data)))
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return data;
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else
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return SCM_BOOL_F;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_syncase_macro_type, "syncase-macro-type", 1, 0, 0,
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(SCM m),
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"Return the type of the macro @var{m}.")
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#define FUNC_NAME s_scm_syncase_macro_type
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{
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SCM_VALIDATE_SMOB (1, m, macro);
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if (SCM_MACRO_IS_EXTENDED (m))
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return SCM_SMOB_OBJECT_2 (m);
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else
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return SCM_BOOL_F;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_syncase_macro_binding, "syncase-macro-binding", 1, 0, 0,
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(SCM m),
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"Return the binding of the macro @var{m}.")
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#define FUNC_NAME s_scm_syncase_macro_binding
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{
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SCM_VALIDATE_SMOB (1, m, macro);
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if (SCM_MACRO_IS_EXTENDED (m))
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return SCM_SMOB_OBJECT_3 (m);
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else
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return SCM_BOOL_F;
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}
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#undef FUNC_NAME
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void
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scm_init_macros ()
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{
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scm_tc16_macro = scm_make_smob_type ("macro", 0);
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scm_set_smob_print (scm_tc16_macro, macro_print);
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#include "libguile/macros.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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