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f930af2737
* module/ice-9/hooks.scm: New file. * am/bootstrap.am: Add new file. * module/ice-9/deprecated.scm: Add trampolines to (ice-9 hooks). * module/ice-9/scm-style-repl.scm: * module/ice-9/session.scm: * module/ice-9/top-repl.scm: * module/scripts/scan-api.scm: * guile-readline/ice-9/readline.scm: * benchmark-suite/benchmark-suite/lib.scm: * module/system/repl/command.scm: * module/system/repl/common.scm: * module/system/repl/debug.scm: * module/system/repl/error-handling.scm: * module/system/repl/hooks.scm: * module/system/repl/reader.scm: * module/system/repl/repl.scm: * module/ice-9/history.scm: * test-suite/tests/hooks.test: Use the new module. * module/oop/goops.scm: Remove <hook> class definition. * libguile/vm.c: * libguile/init.c: * libguile/Makefile.am: * libguile.h: Remove hooks.h includes. * libguile/hooks.c: * libguile/hooks.h: Remove. * libguile/deprecated.h: * libguile/deprecated.c: Add deprecation shims for C API.
60 lines
2.3 KiB
Scheme
60 lines
2.3 KiB
Scheme
;;; Copyright (C) 2025 Free Software Foundation, Inc.
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;;;
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;;; This library is free software: you can redistribute it and/or modify
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;;; it under the terms of the GNU Lesser General Public License as
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;;; published by the Free Software Foundation, either version 3 of the
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;;; 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 program. If not, see
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;;; <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;;
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;;;
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;;; Code:
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(define-module (system repl reader)
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#:use-module (ice-9 hooks)
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#:use-module (system repl hooks)
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;; FIXME: #:export instead of #:replace once deprecated code is
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;; removed.
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#:replace (repl-reader)
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#:export (set-repl-reader!))
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;;; The default repl-reader function. We may override this if we've
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;;; the readline library.
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(define repl-reader
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(lambda* (prompt #:optional (reader (fluid-ref current-reader)))
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(unless (char-ready?)
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(display (if (string? prompt) prompt (prompt)))
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;; An interesting situation. The printer resets the column to 0
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;; by printing a newline, but we then advance it by printing the
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;; prompt. However the port-column of the output port does not
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;; typically correspond with the actual column on the screen,
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;; because the input is echoed back! Since the input is
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;; line-buffered and thus ends with a newline, the output will
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;; really start on column zero. So, here we zero it out. See bug
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;; 9664.
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;;
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;; Note that for similar reasons, the output-line will not reflect
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;; the actual line on the screen. But given the possibility of
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;; multiline input, the fix is not as straightforward, so we don't
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;; bother.
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;;
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;; Also note that the readline implementation papers over these
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;; concerns, because it's readline itself printing the prompt, and
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;; not Guile.
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(set-port-column! (current-output-port) 0))
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(force-output)
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(run-hook before-read-hook)
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((or reader read) (current-input-port))))
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(define (set-repl-reader! reader)
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(set! repl-reader reader))
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