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c59e5c82c8
Fix typos in docstrings.
542 lines
21 KiB
EmacsLisp
542 lines
21 KiB
EmacsLisp
;;; cmuscheme.el --- Scheme process in a buffer. Adapted from tea.el
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;; Copyright (C) 1988, 1994, 1997, 2002, 2003, 2004,
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;; 2005 Free Software Foundation, Inc.
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;; Author: Olin Shivers <olin.shivers@cs.cmu.edu>
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;; Maintainer: FSF
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;; Keywords: processes, lisp
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs 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
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;; This is a customization of comint-mode (see comint.el)
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;;
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;; Written by Olin Shivers (olin.shivers@cs.cmu.edu). With bits and pieces
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;; lifted from scheme.el, shell.el, clisp.el, newclisp.el, cobol.el, et al..
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;; 8/88
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;;
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;; Please send me bug reports, bug fixes, and extensions, so that I can
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;; merge them into the master source.
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;;
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;; The changelog is at the end of this file.
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;;
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;; NOTE: MIT Cscheme, when invoked with the -emacs flag, has a special user
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;; interface that communicates process state back to the superior emacs by
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;; outputting special control sequences. The gnumacs package, xscheme.el, has
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;; lots and lots of special purpose code to read these control sequences, and
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;; so is very tightly integrated with the cscheme process. The cscheme
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;; interrupt handler and debugger read single character commands in cbreak
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;; mode; when this happens, xscheme.el switches to special keymaps that bind
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;; the single letter command keys to emacs functions that directly send the
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;; character to the scheme process. Cmuscheme mode does *not* provide this
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;; functionality. If you are a cscheme user, you may prefer to use the
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;; xscheme.el/cscheme -emacs interaction.
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;;
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;; Here's a summary of the pros and cons, as I see them.
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;; xscheme: Tightly integrated with inferior cscheme process! A few commands
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;; not in cmuscheme. But. Integration is a bit of a hack. Input
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;; history only keeps the immediately prior input. Bizarre
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;; keybindings.
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;;
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;; cmuscheme: Not tightly integrated with inferior cscheme process. But.
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;; Carefully integrated functionality with the entire suite of
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;; comint-derived CMU process modes. Keybindings reminiscent of
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;; Zwei and Hemlock. Good input history. A few commands not in
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;; xscheme.
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;;
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;; It's a tradeoff. Pay your money; take your choice. If you use a Scheme
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;; that isn't Cscheme, of course, there isn't a choice. Xscheme.el is *very*
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;; Cscheme-specific; you must use cmuscheme.el. Interested parties are
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;; invited to port xscheme functionality on top of comint mode...
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;;; CHANGE LOG
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;;; ===========================================================================
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;;; 8/88 Olin
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;;; Created.
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;;;
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;;; 2/15/89 Olin
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;;; Removed -emacs flag from process invocation. It's only useful for
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;;; cscheme, and makes cscheme assume it's running under xscheme.el,
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;;; which messes things up royally. A bug.
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;;;
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;;; 5/22/90 Olin
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;;; - Upgraded to use comint-send-string and comint-send-region.
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;;; - run-scheme now offers to let you edit the command line if
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;;; you invoke it with a prefix-arg. M-x scheme is redundant, and
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;;; has been removed.
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;;; - Explicit references to process "scheme" have been replaced with
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;;; (scheme-proc). This allows better handling of multiple process bufs.
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;;; - Added scheme-send-last-sexp, bound to C-x C-e. A gnu convention.
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;;; - Have not added process query facility a la cmulisp.el's lisp-show-arglist
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;;; and friends, but interested hackers might find a useful application
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;;; of this facility.
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;;;
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;;; 3/12/90 Olin
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;;; - scheme-load-file and scheme-compile-file no longer switch-to-scheme.
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;;; Tale suggested this.
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;;; Code:
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(require 'scheme)
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(require 'comint)
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(defgroup cmuscheme nil
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"Run a scheme process in a buffer."
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:group 'scheme)
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;;; INFERIOR SCHEME MODE STUFF
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;;;============================================================================
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(defcustom inferior-scheme-mode-hook nil
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"*Hook for customizing inferior-scheme mode."
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:type 'hook
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:group 'cmuscheme)
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(defvar inferior-scheme-mode-map
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(let ((m (make-sparse-keymap)))
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(define-key m "\M-\C-x" 'scheme-send-definition) ;gnu convention
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(define-key m "\C-x\C-e" 'scheme-send-last-sexp)
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(define-key m "\C-c\C-l" 'scheme-load-file)
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(define-key m "\C-c\C-k" 'scheme-compile-file)
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(scheme-mode-commands m)
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m))
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;; Install the process communication commands in the scheme-mode keymap.
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(define-key scheme-mode-map "\M-\C-x" 'scheme-send-definition);gnu convention
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(define-key scheme-mode-map "\C-x\C-e" 'scheme-send-last-sexp);gnu convention
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(define-key scheme-mode-map "\C-c\C-e" 'scheme-send-definition)
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(define-key scheme-mode-map "\C-c\M-e" 'scheme-send-definition-and-go)
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(define-key scheme-mode-map "\C-c\C-r" 'scheme-send-region)
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(define-key scheme-mode-map "\C-c\M-r" 'scheme-send-region-and-go)
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(define-key scheme-mode-map "\C-c\M-c" 'scheme-compile-definition)
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(define-key scheme-mode-map "\C-c\C-c" 'scheme-compile-definition-and-go)
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(define-key scheme-mode-map "\C-c\C-t" 'scheme-trace-procedure)
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(define-key scheme-mode-map "\C-c\C-x" 'scheme-expand-current-form)
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(define-key scheme-mode-map "\C-c\C-z" 'switch-to-scheme)
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(define-key scheme-mode-map "\C-c\C-l" 'scheme-load-file)
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(define-key scheme-mode-map "\C-c\C-k" 'scheme-compile-file) ;k for "kompile"
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(let ((map (lookup-key scheme-mode-map [menu-bar scheme])))
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(define-key map [separator-eval] '("--"))
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(define-key map [compile-file]
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'("Compile Scheme File" . scheme-compile-file))
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(define-key map [load-file]
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'("Load Scheme File" . scheme-load-file))
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(define-key map [switch]
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'("Switch to Scheme" . switch-to-scheme))
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(define-key map [com-def-go]
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'("Compile Definition & Go" . scheme-compile-definition-and-go))
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(define-key map [com-def]
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'("Compile Definition" . scheme-compile-definition))
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(define-key map [exp-form]
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'("Expand current form" . scheme-expand-current-form))
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(define-key map [trace-proc]
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'("Trace procedure" . scheme-trace-procedure))
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(define-key map [send-def-go]
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'("Evaluate Last Definition & Go" . scheme-send-definition-and-go))
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(define-key map [send-def]
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'("Evaluate Last Definition" . scheme-send-definition))
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(define-key map [send-region-go]
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'("Evaluate Region & Go" . scheme-send-region-and-go))
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(define-key map [send-region]
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'("Evaluate Region" . scheme-send-region))
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(define-key map [send-sexp]
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'("Evaluate Last S-expression" . scheme-send-last-sexp))
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)
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(defvar scheme-buffer)
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(define-derived-mode inferior-scheme-mode comint-mode "Inferior Scheme"
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"Major mode for interacting with an inferior Scheme process.
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The following commands are available:
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\\{inferior-scheme-mode-map}
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A Scheme process can be fired up with M-x run-scheme.
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Customization: Entry to this mode runs the hooks on comint-mode-hook and
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inferior-scheme-mode-hook (in that order).
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You can send text to the inferior Scheme process from other buffers containing
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Scheme source.
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switch-to-scheme switches the current buffer to the Scheme process buffer.
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scheme-send-definition sends the current definition to the Scheme process.
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scheme-compile-definition compiles the current definition.
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scheme-send-region sends the current region to the Scheme process.
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scheme-compile-region compiles the current region.
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scheme-send-definition-and-go, scheme-compile-definition-and-go,
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scheme-send-region-and-go, and scheme-compile-region-and-go
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switch to the Scheme process buffer after sending their text.
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For information on running multiple processes in multiple buffers, see
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documentation for variable scheme-buffer.
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Commands:
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Return after the end of the process' output sends the text from the
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end of process to point.
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Return before the end of the process' output copies the sexp ending at point
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to the end of the process' output, and sends it.
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Delete converts tabs to spaces as it moves back.
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Tab indents for Scheme; with argument, shifts rest
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of expression rigidly with the current line.
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C-M-q does Tab on each line starting within following expression.
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Paragraphs are separated only by blank lines. Semicolons start comments.
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If you accidentally suspend your process, use \\[comint-continue-subjob]
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to continue it."
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;; Customize in inferior-scheme-mode-hook
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(setq comint-prompt-regexp "^[^>\n]*>+ *") ; OK for cscheme, oaklisp, T,...
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(scheme-mode-variables)
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(setq mode-line-process '(":%s"))
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(setq comint-input-filter (function scheme-input-filter))
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(setq comint-get-old-input (function scheme-get-old-input)))
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(defcustom inferior-scheme-filter-regexp "\\`\\s *\\S ?\\S ?\\s *\\'"
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"*Input matching this regexp are not saved on the history list.
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Defaults to a regexp ignoring all inputs of 0, 1, or 2 letters."
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:type 'regexp
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:group 'cmuscheme)
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(defun scheme-input-filter (str)
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"Don't save anything matching `inferior-scheme-filter-regexp'."
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(not (string-match inferior-scheme-filter-regexp str)))
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(defun scheme-get-old-input ()
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"Snarf the sexp ending at point."
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(save-excursion
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(let ((end (point)))
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(backward-sexp)
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(buffer-substring (point) end))))
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(defun scheme-args-to-list (string)
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(let ((where (string-match "[ \t]" string)))
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(cond ((null where) (list string))
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((not (= where 0))
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(cons (substring string 0 where)
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(scheme-args-to-list (substring string (+ 1 where)
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(length string)))))
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(t (let ((pos (string-match "[^ \t]" string)))
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(if (null pos)
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nil
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(scheme-args-to-list (substring string pos
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(length string)))))))))
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;;;###autoload
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(defun run-scheme (cmd)
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"Run an inferior Scheme process, input and output via buffer `*scheme*'.
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If there is a process already running in `*scheme*', switch to that buffer.
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With argument, allows you to edit the command line (default is value
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of `scheme-program-name').
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If a file `~/.emacs_SCHEMENAME' exists, it is given as initial input.
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Note that this may lose due to a timing error if the Scheme processor
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discards input when it starts up.
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Runs the hook `inferior-scheme-mode-hook' \(after the `comint-mode-hook'
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is run).
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\(Type \\[describe-mode] in the process buffer for a list of commands.)"
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(interactive (list (if current-prefix-arg
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(read-string "Run Scheme: " scheme-program-name)
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scheme-program-name)))
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(if (not (comint-check-proc "*scheme*"))
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(let ((cmdlist (scheme-args-to-list cmd)))
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(set-buffer (apply 'make-comint "scheme" (car cmdlist)
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(scheme-start-file (car cmdlist)) (cdr cmdlist)))
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(inferior-scheme-mode)))
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(setq scheme-program-name cmd)
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(setq scheme-buffer "*scheme*")
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(pop-to-buffer "*scheme*"))
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;;;###autoload (add-hook 'same-window-buffer-names "*scheme*")
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(defun scheme-start-file (prog)
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"Return the name of the start file corresponding to PROG.
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Search in the directories \"~\" and \"~/.emacs.d\", in this
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order. Return nil if no start file found."
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(let* ((name (concat ".emacs_" (file-name-nondirectory prog)))
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(start-file (concat "~/" name)))
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(if (file-exists-p start-file)
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start-file
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(let ((start-file (concat "~/.emacs.d/" name)))
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(and (file-exists-p start-file) start-file)))))
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(defun scheme-send-region (start end)
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"Send the current region to the inferior Scheme process."
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(interactive "r")
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(comint-send-region (scheme-proc) start end)
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(comint-send-string (scheme-proc) "\n"))
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(defun scheme-send-definition ()
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"Send the current definition to the inferior Scheme process."
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(interactive)
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(save-excursion
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(end-of-defun)
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(let ((end (point)))
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(beginning-of-defun)
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(scheme-send-region (point) end))))
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(defun scheme-send-last-sexp ()
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"Send the previous sexp to the inferior Scheme process."
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(interactive)
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(scheme-send-region (save-excursion (backward-sexp) (point)) (point)))
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(defcustom scheme-compile-exp-command "(compile '%s)"
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"*Template for issuing commands to compile arbitrary Scheme expressions."
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:type 'string
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:group 'cmuscheme)
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(defun scheme-compile-region (start end)
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"Compile the current region in the inferior Scheme process.
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\(A BEGIN is wrapped around the region: (BEGIN <region>))"
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(interactive "r")
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(comint-send-string (scheme-proc) (format scheme-compile-exp-command
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(format "(begin %s)"
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(buffer-substring start end))))
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(comint-send-string (scheme-proc) "\n"))
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(defun scheme-compile-definition ()
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"Compile the current definition in the inferior Scheme process."
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(interactive)
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(save-excursion
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(end-of-defun)
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(let ((end (point)))
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(beginning-of-defun)
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(scheme-compile-region (point) end))))
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(defcustom scheme-trace-command "(trace %s)"
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"*Template for issuing commands to trace a Scheme procedure.
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Some Scheme implementations might require more elaborate commands here.
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For PLT-Scheme, e.g., one should use
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(setq scheme-trace-command \"(begin (require (lib \\\"trace.ss\\\")) (trace %s))\")
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For Scheme 48 and Scsh use \",trace %s\"."
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:type 'string
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:group 'cmuscheme)
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(defcustom scheme-untrace-command "(untrace %s)"
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"*Template for switching off tracing of a Scheme procedure.
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Scheme 48 and Scsh users should set this variable to \",untrace %s\"."
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:type 'string
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:group 'cmuscheme)
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(defun scheme-trace-procedure (proc &optional untrace)
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"Trace procedure PROC in the inferior Scheme process.
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With a prefix argument switch off tracing of procedure PROC."
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(interactive
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(list (let ((current (symbol-at-point))
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(action (if current-prefix-arg "Untrace" "Trace")))
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(if current
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(read-string (format "%s procedure [%s]: " action current) nil nil (symbol-name current))
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(read-string (format "%s procedure: " action))))
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current-prefix-arg))
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(when (= (length proc) 0)
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(error "Invalid procedure name"))
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(comint-send-string (scheme-proc)
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(format
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(if untrace scheme-untrace-command scheme-trace-command)
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proc))
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(comint-send-string (scheme-proc) "\n"))
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(defcustom scheme-macro-expand-command "(expand %s)"
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"*Template for macro-expanding a Scheme form.
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For Scheme 48 and Scsh use \",expand %s\"."
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:type 'string
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:group 'cmuscheme)
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(defun scheme-expand-current-form ()
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"Macro-expand the form at point in the inferior Scheme process."
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(interactive)
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(let ((current-form (scheme-form-at-point)))
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(if current-form
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(progn
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(comint-send-string (scheme-proc)
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(format
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scheme-macro-expand-command
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current-form))
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(comint-send-string (scheme-proc) "\n"))
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(error "Not at a form"))))
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(defun scheme-form-at-point ()
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(let ((next-sexp (thing-at-point 'sexp)))
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(if (and next-sexp (string-equal (substring next-sexp 0 1) "("))
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next-sexp
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(save-excursion
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(backward-up-list)
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(scheme-form-at-point)))))
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(defun switch-to-scheme (eob-p)
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"Switch to the scheme process buffer.
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With argument, position cursor at end of buffer."
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(interactive "P")
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(if (or (and scheme-buffer (get-buffer scheme-buffer))
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(scheme-interactively-start-process))
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(pop-to-buffer scheme-buffer)
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(error "No current process buffer. See variable `scheme-buffer'"))
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(when eob-p
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(push-mark)
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(goto-char (point-max))))
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(defun scheme-send-region-and-go (start end)
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"Send the current region to the inferior Scheme process.
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Then switch to the process buffer."
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(interactive "r")
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(scheme-send-region start end)
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(switch-to-scheme t))
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(defun scheme-send-definition-and-go ()
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"Send the current definition to the inferior Scheme.
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Then switch to the process buffer."
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(interactive)
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(scheme-send-definition)
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(switch-to-scheme t))
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(defun scheme-compile-definition-and-go ()
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"Compile the current definition in the inferior Scheme.
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Then switch to the process buffer."
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(interactive)
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(scheme-compile-definition)
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(switch-to-scheme t))
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(defun scheme-compile-region-and-go (start end)
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"Compile the current region in the inferior Scheme.
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Then switch to the process buffer."
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(interactive "r")
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(scheme-compile-region start end)
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(switch-to-scheme t))
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(defcustom scheme-source-modes '(scheme-mode)
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"*Used to determine if a buffer contains Scheme source code.
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If it's loaded into a buffer that is in one of these major modes, it's
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considered a scheme source file by `scheme-load-file' and `scheme-compile-file'.
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Used by these commands to determine defaults."
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:type '(repeat function)
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:group 'cmuscheme)
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(defvar scheme-prev-l/c-dir/file nil
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"Caches the last (directory . file) pair.
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Caches the last pair used in the last `scheme-load-file' or
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`scheme-compile-file' command. Used for determining the default
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in the next one.")
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(defun scheme-load-file (file-name)
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"Load a Scheme file FILE-NAME into the inferior Scheme process."
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(interactive (comint-get-source "Load Scheme file: " scheme-prev-l/c-dir/file
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scheme-source-modes t)) ; t because `load'
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; needs an exact name
|
||
(comint-check-source file-name) ; Check to see if buffer needs saved.
|
||
(setq scheme-prev-l/c-dir/file (cons (file-name-directory file-name)
|
||
(file-name-nondirectory file-name)))
|
||
(comint-send-string (scheme-proc) (concat "(load \""
|
||
file-name
|
||
"\"\)\n")))
|
||
|
||
(defun scheme-compile-file (file-name)
|
||
"Compile a Scheme file FILE-NAME in the inferior Scheme process."
|
||
(interactive (comint-get-source "Compile Scheme file: "
|
||
scheme-prev-l/c-dir/file
|
||
scheme-source-modes
|
||
nil)) ; nil because COMPILE doesn't
|
||
; need an exact name.
|
||
(comint-check-source file-name) ; Check to see if buffer needs saved.
|
||
(setq scheme-prev-l/c-dir/file (cons (file-name-directory file-name)
|
||
(file-name-nondirectory file-name)))
|
||
(comint-send-string (scheme-proc) (concat "(compile-file \""
|
||
file-name
|
||
"\"\)\n")))
|
||
|
||
|
||
(defvar scheme-buffer nil "*The current scheme process buffer.
|
||
|
||
MULTIPLE PROCESS SUPPORT
|
||
===========================================================================
|
||
Cmuscheme.el supports, in a fairly simple fashion, running multiple Scheme
|
||
processes. To run multiple Scheme processes, you start the first up with
|
||
\\[run-scheme]. It will be in a buffer named *scheme*. Rename this buffer
|
||
with \\[rename-buffer]. You may now start up a new process with another
|
||
\\[run-scheme]. It will be in a new buffer, named *scheme*. You can
|
||
switch between the different process buffers with \\[switch-to-buffer].
|
||
|
||
Commands that send text from source buffers to Scheme processes --
|
||
like `scheme-send-definition' or `scheme-compile-region' -- have to choose a
|
||
process to send to, when you have more than one Scheme process around. This
|
||
is determined by the global variable `scheme-buffer'. Suppose you
|
||
have three inferior Schemes running:
|
||
Buffer Process
|
||
foo scheme
|
||
bar scheme<2>
|
||
*scheme* scheme<3>
|
||
If you do a \\[scheme-send-definition-and-go] command on some Scheme source
|
||
code, what process do you send it to?
|
||
|
||
- If you're in a process buffer (foo, bar, or *scheme*),
|
||
you send it to that process.
|
||
- If you're in some other buffer (e.g., a source file), you
|
||
send it to the process attached to buffer `scheme-buffer'.
|
||
This process selection is performed by function `scheme-proc'.
|
||
|
||
Whenever \\[run-scheme] fires up a new process, it resets `scheme-buffer'
|
||
to be the new process's buffer. If you only run one process, this will
|
||
do the right thing. If you run multiple processes, you can change
|
||
`scheme-buffer' to another process buffer with \\[set-variable].
|
||
|
||
More sophisticated approaches are, of course, possible. If you find yourself
|
||
needing to switch back and forth between multiple processes frequently,
|
||
you may wish to consider ilisp.el, a larger, more sophisticated package
|
||
for running inferior Lisp and Scheme processes. The approach taken here is
|
||
for a minimal, simple implementation. Feel free to extend it.")
|
||
|
||
(defun scheme-proc ()
|
||
"Return the current Scheme process, starting one if necessary.
|
||
See variable `scheme-buffer'."
|
||
(unless (and scheme-buffer
|
||
(get-buffer scheme-buffer)
|
||
(comint-check-proc scheme-buffer))
|
||
(scheme-interactively-start-process))
|
||
(or (scheme-get-process)
|
||
(error "No current process. See variable `scheme-buffer'")))
|
||
|
||
(defun scheme-get-process ()
|
||
"Return the current Scheme process or nil if none is running."
|
||
(get-buffer-process (if (eq major-mode 'inferior-scheme-mode)
|
||
(current-buffer)
|
||
scheme-buffer)))
|
||
|
||
(defun scheme-interactively-start-process (&optional cmd)
|
||
"Start an inferior Scheme process. Return the process started.
|
||
Since this command is run implicitly, always ask the user for the
|
||
command to run."
|
||
(save-window-excursion
|
||
(run-scheme (read-string "Run Scheme: " scheme-program-name))))
|
||
|
||
;;; Do the user's customization...
|
||
|
||
(defcustom cmuscheme-load-hook nil
|
||
"This hook is run when cmuscheme is loaded in.
|
||
This is a good place to put keybindings."
|
||
:type 'hook
|
||
:group 'cmuscheme)
|
||
|
||
(run-hooks 'cmuscheme-load-hook)
|
||
|
||
(provide 'cmuscheme)
|
||
|
||
;; arch-tag: e8795f4a-c496-45a2-97b4-8e0f2a2c57d2
|
||
;;; cmuscheme.el ends here
|