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5a0132b337
* libguile/macros.c (macro_print): Show syntax-case bindings, if present. (macro_mark): Mark the extra two words if they're there. (scm_make_syncase_macro, scm_make_extended_syncase_macro): OK! A new take at the "how do we represent syncase macros in Guile" problem. Whereas we need a disjoint type, but would like it to be compatible with old predicates (e.g. `macro?'), and need to be able to extend existing syntax definitions (e.g. `cond'), let's add a bit to macros to indicate whether they have syncase macro bindings or not, and a fourth macro type for native syncase macros. (scm_macro_type): Return 'syntax-case for native syntax-case macros. Note that other macro types may have syntax-case bindings. (scm_macro_name): Return #f if the transformer is not a procedure. (scm_syncase_macro_type, scm_syncase_macro_binding): New accessors for the syncase macro bindings. * libguile/macros.h: Add API for syncase macros. * module/ice-9/boot-9.scm (module-define-keyword!): Adapt to use syncase macros, though they are not yet used. Reorder other syncase API. * module/ice-9/psyntax.scm (chi-expr): Fix syntax-violation invocation.
72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/* classes: h_files */
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#ifndef SCM_MACROS_H
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#define SCM_MACROS_H
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/* Copyright (C) 1998,2000,2001,2002,2003, 2006, 2008 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
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* License as published by the Free Software Foundation; either
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* version 2.1 of 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,
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* but 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 02110-1301 USA
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*/
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#include "libguile/__scm.h"
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#define SCM_ASSYNT(_cond, _msg, _subr) \
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if (!(_cond)) scm_misc_error (_subr, _msg, SCM_EOL);
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#define SCM_MACRO_TYPE_BITS (3)
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#define SCM_MACRO_TYPE_MASK ((1<<SCM_MACRO_TYPE_BITS)-1)
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#define SCM_F_MACRO_EXTENDED (1<<SCM_MACRO_TYPE_BITS)
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#define SCM_MACROP(x) SCM_SMOB_PREDICATE (scm_tc16_macro, (x))
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#define SCM_MACRO_TYPE(m) (SCM_SMOB_FLAGS (m) & SCM_MACRO_TYPE_MASK)
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#define SCM_MACRO_IS_EXTENDED(m) (SCM_SMOB_FLAGS (m) & SCM_F_MACRO_EXTENDED)
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#define SCM_BUILTIN_MACRO_P(x) (SCM_MACROP (x) && SCM_MACRO_TYPE (x) == 3)
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#define SCM_SYNCASE_MACRO_P(x) (SCM_MACROP (x) && SCM_MACRO_TYPE (x) == 4)
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#define SCM_MACRO_CODE(m) SCM_SMOB_OBJECT (m)
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SCM_API scm_t_bits scm_tc16_macro;
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SCM_INTERNAL SCM scm_i_makbimacro (SCM code);
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SCM_API SCM scm_makmmacro (SCM code);
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SCM_API SCM scm_makacro (SCM code);
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SCM_API SCM scm_make_syncase_macro (SCM type, SCM binding);
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SCM_API SCM scm_make_extended_syncase_macro (SCM builtin, SCM type,
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SCM binding);
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SCM_API SCM scm_macro_p (SCM obj);
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SCM_API SCM scm_macro_type (SCM m);
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SCM_API SCM scm_macro_name (SCM m);
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SCM_API SCM scm_macro_transformer (SCM m);
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SCM_API SCM scm_syncase_macro_type (SCM m);
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SCM_API SCM scm_syncase_macro_binding (SCM m);
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SCM_API SCM scm_make_synt (const char *name,
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SCM (*macroizer) (SCM),
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SCM (*fcn) ());
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SCM_INTERNAL void scm_init_macros (void);
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#if SCM_ENABLE_DEPRECATED == 1
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SCM_API SCM scm_makmacro (SCM code);
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#endif
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#endif /* SCM_MACROS_H */
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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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