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9c03e44dcf
Fixes <https://bugs.gnu.org/41353>. Reported by Jan Synacek <jsynacek@redhat.com>. * doc/ref/api-procedures.texi (Procedure Properties): Rephrase documentation of 'thunk?'. * libguile/procs.c (scm_thunk_p): Likewise.
137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
/* Copyright 1995-1997,1999-2001,2006,2008-2013,2017-2018,2020
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Free Software Foundation, Inc.
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This file is part of Guile.
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Guile is free software: you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Guile is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with Guile. If not, see
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<https://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "deprecation.h"
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#include "goops.h"
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#include "gsubr.h"
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#include "loader.h"
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#include "procprop.h"
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#include "programs.h"
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#include "smob.h"
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#include "strings.h"
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#include "struct.h"
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#include "symbols.h"
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#include "vectors.h"
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#include "procs.h"
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/* {Procedures}
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*/
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SCM_DEFINE (scm_procedure_p, "procedure?", 1, 0, 0,
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(SCM obj),
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"Return @code{#t} if @var{obj} is a procedure.")
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#define FUNC_NAME s_scm_procedure_p
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{
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return scm_from_bool (SCM_PROGRAM_P (obj)
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|| (SCM_STRUCTP (obj) && SCM_STRUCT_APPLICABLE_P (obj))
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|| (SCM_HAS_TYP7 (obj, scm_tc7_smob)
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&& SCM_SMOB_APPLICABLE_P (obj)));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_thunk_p, "thunk?", 1, 0, 0,
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(SCM obj),
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"Return @code{#t} if @var{obj} is a procedure that can be "
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"called with zero arguments.")
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#define FUNC_NAME s_scm_thunk_p
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{
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int req, opt, rest;
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return scm_from_bool (scm_i_procedure_arity (obj, &req, &opt, &rest)
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&& req == 0);
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}
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#undef FUNC_NAME
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/* Procedure-with-setter
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*/
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static SCM pws_vtable;
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SCM_DEFINE (scm_procedure_with_setter_p, "procedure-with-setter?", 1, 0, 0,
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(SCM obj),
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"Return @code{#t} if @var{obj} is a procedure with an\n"
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"associated setter procedure.")
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#define FUNC_NAME s_scm_procedure_with_setter_p
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{
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return scm_from_bool (SCM_STRUCTP (obj) && SCM_STRUCT_SETTER_P (obj));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_make_procedure_with_setter, "make-procedure-with-setter", 2, 0, 0,
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(SCM procedure, SCM setter),
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"Create a new procedure which behaves like @var{procedure}, but\n"
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"with the associated setter @var{setter}.")
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#define FUNC_NAME s_scm_make_procedure_with_setter
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{
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SCM_VALIDATE_PROC (1, procedure);
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SCM_VALIDATE_PROC (2, setter);
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return scm_make_struct_no_tail (pws_vtable, scm_list_2 (procedure, setter));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_procedure, "procedure", 1, 0, 0,
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(SCM proc),
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"Return the procedure of @var{proc}, which must be an\n"
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"applicable struct.")
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#define FUNC_NAME s_scm_procedure
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{
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SCM_ASSERT (SCM_STRUCTP (proc) && SCM_STRUCT_APPLICABLE_P (proc),
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proc, SCM_ARG1, FUNC_NAME);
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return SCM_STRUCT_PROCEDURE (proc);
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}
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#undef FUNC_NAME
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SCM_PRIMITIVE_GENERIC (scm_setter, "setter", 1, 0, 0,
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(SCM proc),
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"Return the setter of @var{proc}, which must be an\n"
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"applicable struct with a setter.")
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#define FUNC_NAME s_scm_setter
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{
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if (SCM_UNLIKELY (!SCM_STRUCTP (proc)))
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return scm_wta_dispatch_1 (g_scm_setter, proc, SCM_ARG1, FUNC_NAME);
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if (SCM_STRUCT_SETTER_P (proc))
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return SCM_STRUCT_SETTER (proc);
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return scm_wta_dispatch_1 (g_scm_setter, proc, SCM_ARG1, FUNC_NAME);
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}
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#undef FUNC_NAME
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void
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scm_init_procs ()
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{
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pws_vtable =
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scm_c_make_struct (scm_applicable_struct_with_setter_vtable_vtable,
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0,
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1,
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SCM_UNPACK (scm_from_latin1_symbol ("pwpw")));
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#include "procs.x"
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}
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