mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-06-06 04:00:26 +02:00
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
|
||
Free Software Foundation, Inc.
|
||
|
||
This file is part of Guile.
|
||
|
||
Guile is free software: you can redistribute it and/or modify it
|
||
under the terms of the GNU Lesser General Public License as published
|
||
by the Free Software Foundation, either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
Guile 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 Lesser General Public
|
||
License for more details.
|
||
|
||
You should have received a copy of the GNU Lesser General Public
|
||
License along with Guile. If not, see
|
||
<https://www.gnu.org/licenses/>. */
|
||
|
||
|
||
|
||
#ifdef HAVE_CONFIG_H
|
||
# include <config.h>
|
||
#endif
|
||
|
||
#include <alloca.h>
|
||
|
||
#include "alist.h"
|
||
#include "async.h"
|
||
#include "continuations.h"
|
||
#include "debug.h"
|
||
#include "deprecation.h"
|
||
#include "dynwind.h"
|
||
#include "eq.h"
|
||
#include "eval.h"
|
||
#include "feature.h"
|
||
#include "fluids.h"
|
||
#include "goops.h"
|
||
#include "gsubr.h"
|
||
#include "hash.h"
|
||
#include "hashtab.h"
|
||
#include "list.h"
|
||
#include "macros.h"
|
||
#include "memoize.h"
|
||
#include "modules.h"
|
||
#include "ports.h"
|
||
#include "print.h"
|
||
#include "procprop.h"
|
||
#include "procs.h"
|
||
#include "programs.h"
|
||
#include "smob.h"
|
||
#include "stackchk.h"
|
||
#include "strings.h"
|
||
#include "threads.h"
|
||
#include "throw.h"
|
||
#include "values.h"
|
||
|
||
#include "promises.h"
|
||
|
||
|
||
|
||
|
||
scm_t_bits scm_tc16_promise;
|
||
|
||
SCM_DEFINE (scm_make_promise, "make-promise", 1, 0, 0,
|
||
(SCM thunk),
|
||
"Create a new promise object.\n\n"
|
||
"@code{make-promise} is a procedural form of @code{delay}.\n"
|
||
"These two expressions are equivalent:\n"
|
||
"@lisp\n"
|
||
"(delay @var{exp})\n"
|
||
"(make-promise (lambda () @var{exp}))\n"
|
||
"@end lisp\n")
|
||
#define FUNC_NAME s_scm_make_promise
|
||
{
|
||
SCM_VALIDATE_THUNK (1, thunk);
|
||
SCM_RETURN_NEWSMOB2 (scm_tc16_promise,
|
||
SCM_UNPACK (thunk),
|
||
SCM_UNPACK (scm_make_recursive_mutex ()));
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
static int
|
||
promise_print (SCM exp, SCM port, scm_print_state *pstate)
|
||
{
|
||
int writingp = SCM_WRITINGP (pstate);
|
||
scm_puts ("#<promise ", port);
|
||
SCM_SET_WRITINGP (pstate, 1);
|
||
scm_iprin1 (SCM_PROMISE_DATA (exp), port, pstate);
|
||
SCM_SET_WRITINGP (pstate, writingp);
|
||
scm_putc ('>', port);
|
||
return !0;
|
||
}
|
||
|
||
SCM_DEFINE (scm_force, "force", 1, 0, 0,
|
||
(SCM promise),
|
||
"If @var{promise} has not been computed yet, compute and\n"
|
||
"return @var{promise}, otherwise just return the previously computed\n"
|
||
"value.")
|
||
#define FUNC_NAME s_scm_force
|
||
{
|
||
SCM_VALIDATE_SMOB (1, promise, promise);
|
||
scm_lock_mutex (SCM_PROMISE_MUTEX (promise));
|
||
if (!SCM_PROMISE_COMPUTED_P (promise))
|
||
{
|
||
SCM ans = scm_call_0 (SCM_PROMISE_DATA (promise));
|
||
if (!SCM_PROMISE_COMPUTED_P (promise))
|
||
{
|
||
SCM_SET_PROMISE_DATA (promise, ans);
|
||
SCM_SET_PROMISE_COMPUTED (promise);
|
||
}
|
||
}
|
||
scm_unlock_mutex (SCM_PROMISE_MUTEX (promise));
|
||
return SCM_PROMISE_DATA (promise);
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
|
||
SCM_DEFINE (scm_promise_p, "promise?", 1, 0, 0,
|
||
(SCM obj),
|
||
"Return true if @var{obj} is a promise, i.e. a delayed computation\n"
|
||
"(@pxref{Delayed evaluation,,,r5rs.info,The Revised^5 Report on Scheme}).")
|
||
#define FUNC_NAME s_scm_promise_p
|
||
{
|
||
return scm_from_bool (SCM_TYP16_PREDICATE (scm_tc16_promise, obj));
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
void
|
||
scm_init_promises ()
|
||
{
|
||
scm_tc16_promise = scm_make_smob_type ("promise", 0);
|
||
scm_set_smob_print (scm_tc16_promise, promise_print);
|
||
|
||
#include "promises.x"
|
||
|
||
scm_add_feature ("delay");
|
||
}
|