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e3b743dc72
* module/ice-9/source-properties.scm: New file, providing the source-properties API, as well as a replacement for `read' that always attaches source properties, regardless of the 'positions option on the port. * am/bootstrap.am (SOURCES): Add the new file. * libguile/srcprop.c: * libguile/srcprop.h: Remove. * libguile/Makefile.am (libguile_@GUILE_EFFECTIVE_VERSION@_la_SOURCES): (DOT_X_FILES): (DOT_DOC_FILES): (modinclude_HEADERS): * libguile.h: Remove srcprop.h. * libguile/deprecated.c: * libguile/deprecated.h: Add deprecation shims for srcprop.h interface. * libguile/backtrace.c: * libguile/debug.c: * libguile/eval.c: * libguile/init.c: * libguile/memoize.c: * libguile/promises.c: * libguile/read.c: * libguile/syntax.c: Remove needless srcprop.h includes. * module/ice-9/boot-9.scm: Reorder some definitions so that deprecated modules can use the (system syntax internal) module. * module/ice-9/deprecated.scm: Add shims for Scheme source-properties interface. * module/ice-9/read.scm (read): Never attach source properties. Users that want source can use read-syntax. * module/language/cps.scm: * module/language/cps/spec.scm: * module/language/ecmascript/compile-tree-il.scm: * module/language/elisp/compile-tree-il.scm: * module/language/elisp/lexer.scm: * module/language/elisp/parser.scm: * module/language/tree-il.scm: * module/language/tree-il/spec.scm: * module/language/wisp.scm: * module/system/base/lalr.scm: * test-suite/tests/elisp-reader.test: * test-suite/tests/reader.test: * test-suite/tests/srcprop.test: * test-suite/tests/srfi-105.test: * test-suite/tests/srfi-119.test: Use the (ice-9 source-properties) module to get access to source properties.
138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
/* Copyright 1995-2011,2018,2025
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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 <alloca.h>
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#include "alist.h"
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#include "async.h"
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#include "continuations.h"
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#include "debug.h"
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#include "deprecation.h"
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#include "dynwind.h"
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#include "eq.h"
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#include "eval.h"
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#include "feature.h"
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#include "fluids.h"
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#include "goops.h"
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#include "gsubr.h"
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#include "hash.h"
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#include "hashtab.h"
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#include "list.h"
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#include "macros.h"
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#include "memoize.h"
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#include "modules.h"
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#include "ports.h"
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#include "print.h"
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#include "procprop.h"
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#include "procs.h"
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#include "programs.h"
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#include "smob.h"
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#include "stackchk.h"
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#include "strings.h"
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#include "threads.h"
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#include "throw.h"
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#include "values.h"
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#include "promises.h"
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scm_t_bits scm_tc16_promise;
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SCM_DEFINE (scm_make_promise, "make-promise", 1, 0, 0,
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(SCM thunk),
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"Create a new promise object.\n\n"
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"@code{make-promise} is a procedural form of @code{delay}.\n"
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"These two expressions are equivalent:\n"
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"@lisp\n"
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"(delay @var{exp})\n"
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"(make-promise (lambda () @var{exp}))\n"
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"@end lisp\n")
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#define FUNC_NAME s_scm_make_promise
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{
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SCM_VALIDATE_THUNK (1, thunk);
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SCM_RETURN_NEWSMOB2 (scm_tc16_promise,
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SCM_UNPACK (thunk),
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SCM_UNPACK (scm_make_recursive_mutex ()));
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}
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#undef FUNC_NAME
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static int
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promise_print (SCM exp, SCM port, scm_print_state *pstate)
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{
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int writingp = SCM_WRITINGP (pstate);
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scm_puts ("#<promise ", port);
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SCM_SET_WRITINGP (pstate, 1);
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scm_iprin1 (SCM_PROMISE_DATA (exp), port, pstate);
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SCM_SET_WRITINGP (pstate, writingp);
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scm_putc ('>', port);
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return !0;
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}
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SCM_DEFINE (scm_force, "force", 1, 0, 0,
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(SCM promise),
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"If @var{promise} has not been computed yet, compute and\n"
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"return @var{promise}, otherwise just return the previously computed\n"
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"value.")
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#define FUNC_NAME s_scm_force
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{
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SCM_VALIDATE_SMOB (1, promise, promise);
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scm_lock_mutex (SCM_PROMISE_MUTEX (promise));
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if (!SCM_PROMISE_COMPUTED_P (promise))
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{
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SCM ans = scm_call_0 (SCM_PROMISE_DATA (promise));
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if (!SCM_PROMISE_COMPUTED_P (promise))
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{
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SCM_SET_PROMISE_DATA (promise, ans);
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SCM_SET_PROMISE_COMPUTED (promise);
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}
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}
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scm_unlock_mutex (SCM_PROMISE_MUTEX (promise));
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return SCM_PROMISE_DATA (promise);
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_promise_p, "promise?", 1, 0, 0,
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(SCM obj),
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"Return true if @var{obj} is a promise, i.e. a delayed computation\n"
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"(@pxref{Delayed evaluation,,,r5rs.info,The Revised^5 Report on Scheme}).")
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#define FUNC_NAME s_scm_promise_p
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{
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return scm_from_bool (SCM_TYP16_PREDICATE (scm_tc16_promise, obj));
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}
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#undef FUNC_NAME
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void
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scm_init_promises ()
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{
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scm_tc16_promise = scm_make_smob_type ("promise", 0);
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scm_set_smob_print (scm_tc16_promise, promise_print);
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#include "promises.x"
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scm_add_feature ("delay");
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}
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