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1366 lines
59 KiB
EmacsLisp
1366 lines
59 KiB
EmacsLisp
;;; lisp-mode.el --- Lisp mode, and its idiosyncratic commands -*- lexical-binding:t -*-
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;; Copyright (C) 1985-1986, 1999-2019 Free Software Foundation, Inc.
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;; Maintainer: emacs-devel@gnu.org
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;; Keywords: lisp, languages
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;; Package: emacs
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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 3 of the License, or
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;; (at your option) 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. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; The base major mode for editing Lisp code (used also for Emacs Lisp).
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;; This mode is documented in the Emacs manual.
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;;; Code:
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(eval-when-compile (require 'cl-lib))
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(defvar font-lock-comment-face)
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(defvar font-lock-doc-face)
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(defvar font-lock-keywords-case-fold-search)
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(defvar font-lock-string-face)
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(define-abbrev-table 'lisp-mode-abbrev-table ()
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"Abbrev table for Lisp mode.")
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(defvar lisp--mode-syntax-table
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(let ((table (make-syntax-table))
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(i 0))
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(while (< i ?0)
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(modify-syntax-entry i "_ " table)
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(setq i (1+ i)))
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(setq i (1+ ?9))
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(while (< i ?A)
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(modify-syntax-entry i "_ " table)
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(setq i (1+ i)))
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(setq i (1+ ?Z))
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(while (< i ?a)
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(modify-syntax-entry i "_ " table)
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(setq i (1+ i)))
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(setq i (1+ ?z))
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(while (< i 128)
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(modify-syntax-entry i "_ " table)
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(setq i (1+ i)))
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(modify-syntax-entry ?\s " " table)
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;; Non-break space acts as whitespace.
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(modify-syntax-entry ?\xa0 " " table)
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(modify-syntax-entry ?\t " " table)
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(modify-syntax-entry ?\f " " table)
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(modify-syntax-entry ?\n "> " table)
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;; This is probably obsolete since nowadays such features use overlays.
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;; ;; Give CR the same syntax as newline, for selective-display.
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;; (modify-syntax-entry ?\^m "> " table)
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(modify-syntax-entry ?\; "< " table)
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(modify-syntax-entry ?` "' " table)
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(modify-syntax-entry ?' "' " table)
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(modify-syntax-entry ?, "' " table)
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(modify-syntax-entry ?@ "_ p" table)
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;; Used to be singlequote; changed for flonums.
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(modify-syntax-entry ?. "_ " table)
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(modify-syntax-entry ?# "' " table)
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(modify-syntax-entry ?\" "\" " table)
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(modify-syntax-entry ?\\ "\\ " table)
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(modify-syntax-entry ?\( "() " table)
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(modify-syntax-entry ?\) ")( " table)
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table)
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"Parent syntax table used in Lisp modes.")
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(defvar lisp-mode-syntax-table
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(let ((table (make-syntax-table lisp--mode-syntax-table)))
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(modify-syntax-entry ?\[ "_ " table)
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(modify-syntax-entry ?\] "_ " table)
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(modify-syntax-entry ?# "' 14" table)
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(modify-syntax-entry ?| "\" 23bn" table)
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table)
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"Syntax table used in `lisp-mode'.")
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(eval-and-compile
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(defconst lisp-mode-symbol-regexp "\\(?:\\sw\\|\\s_\\|\\\\.\\)+"))
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(defvar lisp-imenu-generic-expression
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(list
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(list nil
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(purecopy (concat "^\\s-*("
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(eval-when-compile
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(regexp-opt
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'("defun" "defmacro"
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;; Elisp.
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"defun*" "defsubst" "define-inline"
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"define-advice" "defadvice" "define-skeleton"
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"define-compilation-mode" "define-minor-mode"
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"define-global-minor-mode"
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"define-globalized-minor-mode"
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"define-derived-mode" "define-generic-mode"
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"ert-deftest"
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"cl-defun" "cl-defsubst" "cl-defmacro"
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"cl-define-compiler-macro" "cl-defgeneric"
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"cl-defmethod"
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;; CL.
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"define-compiler-macro" "define-modify-macro"
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"defsetf" "define-setf-expander"
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"define-method-combination"
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;; CLOS and EIEIO
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"defgeneric" "defmethod")
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t))
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"\\s-+\\(" lisp-mode-symbol-regexp "\\)"))
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2)
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(list (purecopy "Variables")
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(purecopy (concat "^\\s-*("
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(eval-when-compile
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(regexp-opt
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'(;; Elisp
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"defconst" "defcustom"
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;; CL
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"defconstant"
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"defparameter" "define-symbol-macro")
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t))
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"\\s-+\\(" lisp-mode-symbol-regexp "\\)"))
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2)
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;; For `defvar'/`defvar-local', we ignore (defvar FOO) constructs.
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(list (purecopy "Variables")
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(purecopy (concat "^\\s-*(defvar\\(?:-local\\)?\\s-+\\("
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lisp-mode-symbol-regexp "\\)"
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"[[:space:]\n]+[^)]"))
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1)
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(list (purecopy "Types")
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(purecopy (concat "^\\s-*("
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(eval-when-compile
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(regexp-opt
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'(;; Elisp
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"defgroup" "deftheme"
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"define-widget" "define-error"
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"defface" "cl-deftype" "cl-defstruct"
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;; CL
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"deftype" "defstruct"
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"define-condition" "defpackage"
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;; CLOS and EIEIO
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"defclass")
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t))
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"\\s-+'?\\(" lisp-mode-symbol-regexp "\\)"))
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2))
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"Imenu generic expression for Lisp mode. See `imenu-generic-expression'.")
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;; This was originally in autoload.el and is still used there.
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(put 'autoload 'doc-string-elt 3)
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(put 'defmethod 'doc-string-elt 3)
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(put 'defvar 'doc-string-elt 3)
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(put 'defconst 'doc-string-elt 3)
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(put 'defalias 'doc-string-elt 3)
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(put 'defvaralias 'doc-string-elt 3)
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(put 'define-category 'doc-string-elt 2)
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;; CL
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(put 'defconstant 'doc-string-elt 3)
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(put 'defparameter 'doc-string-elt 3)
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(defvar lisp-doc-string-elt-property 'doc-string-elt
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"The symbol property that holds the docstring position info.")
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(defconst lisp-prettify-symbols-alist '(("lambda" . ?λ))
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"Alist of symbol/\"pretty\" characters to be displayed.")
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;;;; Font-lock support.
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(defun lisp--match-hidden-arg (limit)
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(let ((res nil))
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(while
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(let ((ppss (parse-partial-sexp (line-beginning-position)
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(line-end-position)
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-1)))
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(skip-syntax-forward " )")
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(if (or (>= (car ppss) 0)
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(looking-at ";\\|$"))
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(progn
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(forward-line 1)
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(< (point) limit))
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(looking-at ".*") ;Set the match-data.
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(forward-line 1)
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(setq res (point))
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nil)))
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res))
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(defun lisp--el-non-funcall-position-p (pos)
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"Heuristically determine whether POS is an evaluated position."
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(save-match-data
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(save-excursion
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(ignore-errors
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(goto-char pos)
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(or (eql (char-before) ?\')
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(let* ((ppss (syntax-ppss))
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(paren-posns (nth 9 ppss))
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(parent
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(when paren-posns
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(goto-char (car (last paren-posns))) ;(up-list -1)
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(cond
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((ignore-errors
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(and (eql (char-after) ?\()
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(when (cdr paren-posns)
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(goto-char (car (last paren-posns 2)))
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(looking-at "(\\_<let\\*?\\_>"))))
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(goto-char (match-end 0))
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'let)
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((looking-at
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(rx "("
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(group-n 1 (+ (or (syntax w) (syntax _))))
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symbol-end))
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(prog1 (intern-soft (match-string-no-properties 1))
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(goto-char (match-end 1))))))))
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(or (eq parent 'declare)
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(and (eq parent 'let)
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(progn
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(forward-sexp 1)
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(< pos (point))))
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(and (eq parent 'condition-case)
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(progn
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(forward-sexp 2)
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(< (point) pos))))))))))
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(defun lisp--el-match-keyword (limit)
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;; FIXME: Move to elisp-mode.el.
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(catch 'found
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(while (re-search-forward
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(eval-when-compile
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(concat "(\\(" lisp-mode-symbol-regexp "\\)\\_>"))
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limit t)
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(let ((sym (intern-soft (match-string 1))))
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(when (or (special-form-p sym)
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(and (macrop sym)
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(not (get sym 'no-font-lock-keyword))
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(not (lisp--el-non-funcall-position-p
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(match-beginning 0)))))
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(throw 'found t))))))
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(defmacro let-when-compile (bindings &rest body)
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"Like `let*', but allow for compile time optimization.
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Use BINDINGS as in regular `let*', but in BODY each usage should
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be wrapped in `eval-when-compile'.
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This will generate compile-time constants from BINDINGS."
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(declare (indent 1) (debug let))
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(letrec ((loop
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(lambda (bindings)
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(if (null bindings)
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(macroexpand-all (macroexp-progn body)
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macroexpand-all-environment)
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(let ((binding (pop bindings)))
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(cl-progv (list (car binding))
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(list (eval (nth 1 binding) t))
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(funcall loop bindings)))))))
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(funcall loop bindings)))
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(defun elisp--font-lock-backslash ()
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(let* ((beg0 (match-beginning 0))
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(end0 (match-end 0))
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(ppss (save-excursion (syntax-ppss beg0))))
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(and (nth 3 ppss) ;Inside a string.
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(not (nth 5 ppss)) ;The \ is not itself \-escaped.
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;; Don't highlight the \( introduced because of
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;; `open-paren-in-column-0-is-defun-start'.
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(not (eq ?\n (char-before beg0)))
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(equal (ignore-errors
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(car (read-from-string
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(format "\"%s\""
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(buffer-substring-no-properties
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beg0 end0)))))
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(buffer-substring-no-properties (1+ beg0) end0))
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`(face ,font-lock-warning-face
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help-echo "This \\ has no effect"))))
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(let-when-compile
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((lisp-fdefs '("defmacro" "defun"))
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(lisp-vdefs '("defvar"))
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(lisp-kw '("cond" "if" "while" "let" "let*" "progn" "prog1"
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"prog2" "lambda" "unwind-protect" "condition-case"
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"when" "unless" "with-output-to-string"
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"ignore-errors" "dotimes" "dolist" "declare"))
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(lisp-errs '("warn" "error" "signal"))
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;; Elisp constructs. Now they are update dynamically
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;; from obarray but they are also used for setting up
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;; the keywords for Common Lisp.
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(el-fdefs '("defsubst" "cl-defsubst" "define-inline"
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"define-advice" "defadvice" "defalias"
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"define-derived-mode" "define-minor-mode"
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"define-generic-mode" "define-global-minor-mode"
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"define-globalized-minor-mode" "define-skeleton"
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"define-widget" "ert-deftest"))
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(el-vdefs '("defconst" "defcustom" "defvaralias" "defvar-local"
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"defface"))
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(el-tdefs '("defgroup" "deftheme"))
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(el-errs '("user-error"))
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;; Common-Lisp constructs supported by EIEIO. FIXME: namespace.
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(eieio-fdefs '("defgeneric" "defmethod"))
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(eieio-tdefs '("defclass"))
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;; Common-Lisp constructs supported by cl-lib.
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(cl-lib-fdefs '("defmacro" "defsubst" "defun" "defmethod" "defgeneric"))
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(cl-lib-tdefs '("defstruct" "deftype"))
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(cl-lib-errs '("assert" "check-type"))
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;; Common-Lisp constructs not supported by cl-lib.
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(cl-fdefs '("defsetf" "define-method-combination"
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"define-condition" "define-setf-expander"
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;; "define-function"??
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"define-compiler-macro" "define-modify-macro"))
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(cl-vdefs '("define-symbol-macro" "defconstant" "defparameter"))
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(cl-tdefs '("defpackage" "defstruct" "deftype"))
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(cl-kw '("block" "break" "case" "ccase" "compiler-let" "ctypecase"
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"declaim" "destructuring-bind" "do" "do*"
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"ecase" "etypecase" "eval-when" "flet" "flet*"
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"go" "handler-case" "handler-bind" "in-package" ;; "inline"
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"labels" "letf" "locally" "loop"
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"macrolet" "multiple-value-bind" "multiple-value-prog1"
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"proclaim" "prog" "prog*" "progv"
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"restart-case" "restart-bind" "return" "return-from"
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"symbol-macrolet" "tagbody" "the" "typecase"
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"with-accessors" "with-compilation-unit"
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"with-condition-restarts" "with-hash-table-iterator"
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"with-input-from-string" "with-open-file"
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"with-open-stream" "with-package-iterator"
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"with-simple-restart" "with-slots" "with-standard-io-syntax"))
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(cl-errs '("abort" "cerror")))
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(let ((vdefs (eval-when-compile
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(append lisp-vdefs el-vdefs cl-vdefs)))
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(tdefs (eval-when-compile
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(append el-tdefs eieio-tdefs cl-tdefs cl-lib-tdefs
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(mapcar (lambda (s) (concat "cl-" s)) cl-lib-tdefs))))
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;; Elisp and Common Lisp definers.
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(el-defs-re (eval-when-compile
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(regexp-opt (append lisp-fdefs lisp-vdefs
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el-fdefs el-vdefs el-tdefs
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(mapcar (lambda (s) (concat "cl-" s))
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(append cl-lib-fdefs cl-lib-tdefs))
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eieio-fdefs eieio-tdefs)
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t)))
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(cl-defs-re (eval-when-compile
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(regexp-opt (append lisp-fdefs lisp-vdefs
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cl-lib-fdefs cl-lib-tdefs
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eieio-fdefs eieio-tdefs
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cl-fdefs cl-vdefs cl-tdefs)
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t)))
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;; Common Lisp keywords (Elisp keywords are handled dynamically).
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(cl-kws-re (eval-when-compile
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(regexp-opt (append lisp-kw cl-kw) t)))
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;; Elisp and Common Lisp "errors".
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(el-errs-re (eval-when-compile
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(regexp-opt (append (mapcar (lambda (s) (concat "cl-" s))
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cl-lib-errs)
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lisp-errs el-errs)
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t)))
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(cl-errs-re (eval-when-compile
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(regexp-opt (append lisp-errs cl-lib-errs cl-errs) t))))
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(dolist (v vdefs)
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(put (intern v) 'lisp-define-type 'var))
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(dolist (v tdefs)
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(put (intern v) 'lisp-define-type 'type))
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(define-obsolete-variable-alias 'lisp-font-lock-keywords-1
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'lisp-el-font-lock-keywords-1 "24.4")
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(defconst lisp-el-font-lock-keywords-1
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`( ;; Definitions.
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(,(concat "(" el-defs-re "\\_>"
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;; Any whitespace and defined object.
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"[ \t']*"
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"\\(([ \t']*\\)?" ;; An opening paren.
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"\\(\\(setf\\)[ \t]+" lisp-mode-symbol-regexp
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"\\|" lisp-mode-symbol-regexp "\\)?")
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(1 font-lock-keyword-face)
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(3 (let ((type (get (intern-soft (match-string 1)) 'lisp-define-type)))
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(cond ((eq type 'var) font-lock-variable-name-face)
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((eq type 'type) font-lock-type-face)
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;; If match-string 2 is non-nil, we encountered a
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;; form like (defalias (intern (concat s "-p"))),
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;; unless match-string 4 is also there. Then its a
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;; defmethod with (setf foo) as name.
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((or (not (match-string 2)) ;; Normal defun.
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(and (match-string 2) ;; Setf method.
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(match-string 4)))
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font-lock-function-name-face)))
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nil t))
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;; Emacs Lisp autoload cookies. Supports the slightly different
|
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;; forms used by mh-e, calendar, etc.
|
||
("^;;;###\\([-a-z]*autoload\\)" 1 font-lock-warning-face prepend))
|
||
"Subdued level highlighting for Emacs Lisp mode.")
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(defconst lisp-cl-font-lock-keywords-1
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`( ;; Definitions.
|
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(,(concat "(" cl-defs-re "\\_>"
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;; Any whitespace and defined object.
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||
"[ \t']*"
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||
"\\(([ \t']*\\)?" ;; An opening paren.
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||
"\\(\\(setf\\)[ \t]+" lisp-mode-symbol-regexp
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"\\|" lisp-mode-symbol-regexp "\\)?")
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||
(1 font-lock-keyword-face)
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(3 (let ((type (get (intern-soft (match-string 1)) 'lisp-define-type)))
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(cond ((eq type 'var) font-lock-variable-name-face)
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((eq type 'type) font-lock-type-face)
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((or (not (match-string 2)) ;; Normal defun.
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(and (match-string 2) ;; Setf function.
|
||
(match-string 4)))
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font-lock-function-name-face)))
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nil t)))
|
||
"Subdued level highlighting for Lisp modes.")
|
||
|
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(define-obsolete-variable-alias 'lisp-font-lock-keywords-2
|
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'lisp-el-font-lock-keywords-2 "24.4")
|
||
(defconst lisp-el-font-lock-keywords-2
|
||
(append
|
||
lisp-el-font-lock-keywords-1
|
||
`( ;; Regexp negated char group.
|
||
("\\[\\(\\^\\)" 1 font-lock-negation-char-face prepend)
|
||
;; Erroneous structures.
|
||
(,(concat "(" el-errs-re "\\_>")
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||
(1 font-lock-warning-face))
|
||
;; Control structures. Common Lisp forms.
|
||
(lisp--el-match-keyword . 1)
|
||
;; Exit/Feature symbols as constants.
|
||
(,(concat "(\\(catch\\|throw\\|featurep\\|provide\\|require\\)\\_>"
|
||
"[ \t']*\\(" lisp-mode-symbol-regexp "\\)?")
|
||
(1 font-lock-keyword-face)
|
||
(2 font-lock-constant-face nil t))
|
||
;; Words inside \\[] tend to be for `substitute-command-keys'.
|
||
(,(concat "\\\\\\\\\\[\\(" lisp-mode-symbol-regexp "\\)\\]")
|
||
(1 font-lock-constant-face prepend))
|
||
;; Ineffective backslashes (typically in need of doubling).
|
||
("\\(\\\\\\)\\([^\"\\]\\)"
|
||
(1 (elisp--font-lock-backslash) prepend))
|
||
;; Words inside ‘’ and `' tend to be symbol names.
|
||
(,(concat "[`‘]\\(\\(?:\\sw\\|\\s_\\|\\\\.\\)"
|
||
lisp-mode-symbol-regexp "\\)['’]")
|
||
(1 font-lock-constant-face prepend))
|
||
;; Constant values.
|
||
(,(concat "\\_<:" lisp-mode-symbol-regexp "\\_>")
|
||
(0 font-lock-builtin-face))
|
||
;; ELisp and CLisp `&' keywords as types.
|
||
(,(concat "\\_<\\&" lisp-mode-symbol-regexp "\\_>")
|
||
. font-lock-type-face)
|
||
;; ELisp regexp grouping constructs
|
||
(,(lambda (bound)
|
||
(catch 'found
|
||
;; The following loop is needed to continue searching after matches
|
||
;; that do not occur in strings. The associated regexp matches one
|
||
;; of `\\\\' `\\(' `\\(?:' `\\|' `\\)'. `\\\\' has been included to
|
||
;; avoid highlighting, for example, `\\(' in `\\\\('.
|
||
(while (re-search-forward "\\(\\\\\\\\\\)\\(?:\\(\\\\\\\\\\)\\|\\((\\(?:\\?[0-9]*:\\)?\\|[|)]\\)\\)" bound t)
|
||
(unless (match-beginning 2)
|
||
(let ((face (get-text-property (1- (point)) 'face)))
|
||
(when (or (and (listp face)
|
||
(memq 'font-lock-string-face face))
|
||
(eq 'font-lock-string-face face))
|
||
(throw 'found t)))))))
|
||
(1 'font-lock-regexp-grouping-backslash prepend)
|
||
(3 'font-lock-regexp-grouping-construct prepend))
|
||
(lisp--match-hidden-arg
|
||
(0 '(face font-lock-warning-face
|
||
help-echo "Hidden behind deeper element; move to another line?")))
|
||
))
|
||
"Gaudy level highlighting for Emacs Lisp mode.")
|
||
|
||
(defconst lisp-cl-font-lock-keywords-2
|
||
(append
|
||
lisp-cl-font-lock-keywords-1
|
||
`( ;; Regexp negated char group.
|
||
("\\[\\(\\^\\)" 1 font-lock-negation-char-face prepend)
|
||
;; Control structures. Common Lisp forms.
|
||
(,(concat "(" cl-kws-re "\\_>") . 1)
|
||
;; Exit/Feature symbols as constants.
|
||
(,(concat "(\\(catch\\|throw\\|provide\\|require\\)\\_>"
|
||
"[ \t']*\\(" lisp-mode-symbol-regexp "\\)?")
|
||
(1 font-lock-keyword-face)
|
||
(2 font-lock-constant-face nil t))
|
||
;; Erroneous structures.
|
||
(,(concat "(" cl-errs-re "\\_>")
|
||
(1 font-lock-warning-face))
|
||
;; Words inside ‘’ and `' tend to be symbol names.
|
||
(,(concat "[`‘]\\(\\(?:\\sw\\|\\s_\\|\\\\.\\)"
|
||
lisp-mode-symbol-regexp "\\)['’]")
|
||
(1 font-lock-constant-face prepend))
|
||
;; Uninterned symbols, e.g., (defpackage #:my-package ...)
|
||
;; must come before keywords below to have effect
|
||
(,(concat "\\(#:\\)\\(" lisp-mode-symbol-regexp "\\)")
|
||
(1 font-lock-comment-delimiter-face)
|
||
(2 font-lock-doc-face))
|
||
;; Constant values.
|
||
(,(concat "\\_<:" lisp-mode-symbol-regexp "\\_>")
|
||
(0 font-lock-builtin-face))
|
||
;; ELisp and CLisp `&' keywords as types.
|
||
(,(concat "\\_<\\&" lisp-mode-symbol-regexp "\\_>")
|
||
. font-lock-type-face)
|
||
;; This is too general -- rms.
|
||
;; A user complained that he has functions whose names start with `do'
|
||
;; and that they get the wrong color.
|
||
;; That user has violated the http://www.cliki.net/Naming+conventions:
|
||
;; CL (but not EL!) `with-' (context) and `do-' (iteration)
|
||
(,(concat "(\\(\\(do-\\|with-\\)" lisp-mode-symbol-regexp "\\)")
|
||
(1 font-lock-keyword-face))
|
||
(lisp--match-hidden-arg
|
||
(0 '(face font-lock-warning-face
|
||
help-echo "Hidden behind deeper element; move to another line?")))
|
||
))
|
||
"Gaudy level highlighting for Lisp modes.")))
|
||
|
||
(define-obsolete-variable-alias 'lisp-font-lock-keywords
|
||
'lisp-el-font-lock-keywords "24.4")
|
||
(defvar lisp-el-font-lock-keywords lisp-el-font-lock-keywords-1
|
||
"Default expressions to highlight in Emacs Lisp mode.")
|
||
(defvar lisp-cl-font-lock-keywords lisp-cl-font-lock-keywords-1
|
||
"Default expressions to highlight in Lisp modes.")
|
||
|
||
;; Support backtrace mode.
|
||
(defconst lisp-el-font-lock-keywords-for-backtraces lisp-el-font-lock-keywords
|
||
"Default highlighting from Emacs Lisp mod used in Backtrace mode.")
|
||
(defconst lisp-el-font-lock-keywords-for-backtraces-1 lisp-el-font-lock-keywords-1
|
||
"Subdued highlighting from Emacs Lisp mode used in Backtrace mode.")
|
||
(defconst lisp-el-font-lock-keywords-for-backtraces-2
|
||
(remove (assoc 'lisp--match-hidden-arg lisp-el-font-lock-keywords-2)
|
||
lisp-el-font-lock-keywords-2)
|
||
"Gaudy highlighting from Emacs Lisp mode used in Backtrace mode.")
|
||
|
||
(defun lisp-string-in-doc-position-p (listbeg startpos)
|
||
"Return true if a doc string may occur at STARTPOS inside a list.
|
||
LISTBEG is the position of the start of the innermost list
|
||
containing STARTPOS."
|
||
(let* ((firstsym (and listbeg
|
||
(save-excursion
|
||
(goto-char listbeg)
|
||
(and (looking-at
|
||
(eval-when-compile
|
||
(concat "([ \t\n]*\\("
|
||
lisp-mode-symbol-regexp "\\)")))
|
||
(match-string 1)))))
|
||
(docelt (and firstsym
|
||
(function-get (intern-soft firstsym)
|
||
lisp-doc-string-elt-property))))
|
||
(and docelt
|
||
;; It's a string in a form that can have a docstring.
|
||
;; Check whether it's in docstring position.
|
||
(save-excursion
|
||
(when (functionp docelt)
|
||
(goto-char (match-end 1))
|
||
(setq docelt (funcall docelt)))
|
||
(goto-char listbeg)
|
||
(forward-char 1)
|
||
(condition-case nil
|
||
(while (and (> docelt 0) (< (point) startpos)
|
||
(progn (forward-sexp 1) t))
|
||
(setq docelt (1- docelt)))
|
||
(error nil))
|
||
(and (zerop docelt) (<= (point) startpos)
|
||
(progn (forward-comment (point-max)) t)
|
||
(= (point) startpos))))))
|
||
|
||
(defun lisp-string-after-doc-keyword-p (listbeg startpos)
|
||
"Return true if `:documentation' symbol ends at STARTPOS inside a list.
|
||
LISTBEG is the position of the start of the innermost list
|
||
containing STARTPOS."
|
||
(and listbeg ; We are inside a Lisp form.
|
||
(save-excursion
|
||
(goto-char startpos)
|
||
(ignore-errors
|
||
(progn (backward-sexp 1)
|
||
(looking-at ":documentation\\_>"))))))
|
||
|
||
(defun lisp-font-lock-syntactic-face-function (state)
|
||
"Return syntactic face function for the position represented by STATE.
|
||
STATE is a `parse-partial-sexp' state, and the returned function is the
|
||
Lisp font lock syntactic face function."
|
||
(if (nth 3 state)
|
||
;; This might be a (doc)string or a |...| symbol.
|
||
(let ((startpos (nth 8 state)))
|
||
(if (eq (char-after startpos) ?|)
|
||
;; This is not a string, but a |...| symbol.
|
||
nil
|
||
(let ((listbeg (nth 1 state)))
|
||
(if (or (lisp-string-in-doc-position-p listbeg startpos)
|
||
(lisp-string-after-doc-keyword-p listbeg startpos))
|
||
font-lock-doc-face
|
||
font-lock-string-face))))
|
||
font-lock-comment-face))
|
||
|
||
(defun lisp-adaptive-fill ()
|
||
"Return fill prefix found at point.
|
||
Value for `adaptive-fill-function'."
|
||
;; Adaptive fill mode gets the fill wrong for a one-line paragraph made of
|
||
;; a single docstring. Let's fix it here.
|
||
(if (looking-at "\\s-+\"[^\n\"]+\"\\s-*$") ""))
|
||
|
||
(defun lisp-mode-variables (&optional lisp-syntax keywords-case-insensitive
|
||
elisp)
|
||
"Common initialization routine for lisp modes.
|
||
The LISP-SYNTAX argument is used by code in inf-lisp.el and is
|
||
\(uselessly) passed from pp.el, chistory.el, gnus-kill.el and
|
||
score-mode.el. KEYWORDS-CASE-INSENSITIVE non-nil means that for
|
||
font-lock keywords will not be case sensitive."
|
||
(when lisp-syntax
|
||
(set-syntax-table lisp-mode-syntax-table))
|
||
(setq-local paragraph-ignore-fill-prefix t)
|
||
(setq-local fill-paragraph-function 'lisp-fill-paragraph)
|
||
(setq-local adaptive-fill-function #'lisp-adaptive-fill)
|
||
;; Adaptive fill mode gets in the way of auto-fill,
|
||
;; and should make no difference for explicit fill
|
||
;; because lisp-fill-paragraph should do the job.
|
||
;; I believe that newcomment's auto-fill code properly deals with it -stef
|
||
;;(set (make-local-variable 'adaptive-fill-mode) nil)
|
||
(setq-local indent-line-function 'lisp-indent-line)
|
||
(setq-local indent-region-function 'lisp-indent-region)
|
||
(setq-local comment-indent-function #'lisp-comment-indent)
|
||
(setq-local outline-regexp ";;;\\(;* [^ \t\n]\\|###autoload\\)\\|(")
|
||
(setq-local outline-level 'lisp-outline-level)
|
||
(setq-local add-log-current-defun-function #'lisp-current-defun-name)
|
||
(setq-local comment-start ";")
|
||
(setq-local comment-start-skip ";+ *")
|
||
(setq-local comment-add 1) ;default to `;;' in comment-region
|
||
(setq-local comment-column 40)
|
||
(setq-local comment-use-syntax t)
|
||
(setq-local imenu-generic-expression lisp-imenu-generic-expression)
|
||
(setq-local multibyte-syntax-as-symbol t)
|
||
;; (setq-local syntax-begin-function 'beginning-of-defun) ;;Bug#16247.
|
||
(setq font-lock-defaults
|
||
`(,(if elisp '(lisp-el-font-lock-keywords
|
||
lisp-el-font-lock-keywords-1
|
||
lisp-el-font-lock-keywords-2)
|
||
'(lisp-cl-font-lock-keywords
|
||
lisp-cl-font-lock-keywords-1
|
||
lisp-cl-font-lock-keywords-2))
|
||
nil ,keywords-case-insensitive nil nil
|
||
(font-lock-mark-block-function . mark-defun)
|
||
(font-lock-extra-managed-props help-echo)
|
||
(font-lock-syntactic-face-function
|
||
. lisp-font-lock-syntactic-face-function)))
|
||
(setq-local prettify-symbols-alist lisp-prettify-symbols-alist)
|
||
(setq-local electric-pair-skip-whitespace 'chomp)
|
||
(setq-local electric-pair-open-newline-between-pairs nil))
|
||
|
||
(defun lisp-outline-level ()
|
||
"Lisp mode `outline-level' function."
|
||
(let ((len (- (match-end 0) (match-beginning 0))))
|
||
(if (looking-at "(\\|;;;###autoload")
|
||
1000
|
||
len)))
|
||
|
||
(defun lisp-current-defun-name ()
|
||
"Return the name of the defun at point, or nil."
|
||
(save-excursion
|
||
(let ((location (point)))
|
||
;; If we are now precisely at the beginning of a defun, make sure
|
||
;; beginning-of-defun finds that one rather than the previous one.
|
||
(or (eobp) (forward-char 1))
|
||
(beginning-of-defun)
|
||
;; Make sure we are really inside the defun found, not after it.
|
||
(when (and (looking-at "\\s(")
|
||
(progn (end-of-defun)
|
||
(< location (point)))
|
||
(progn (forward-sexp -1)
|
||
(>= location (point))))
|
||
(if (looking-at "\\s(")
|
||
(forward-char 1))
|
||
;; Skip the defining construct name, typically "defun" or
|
||
;; "defvar".
|
||
(forward-sexp 1)
|
||
;; The second element is usually a symbol being defined. If it
|
||
;; is not, use the first symbol in it.
|
||
(skip-chars-forward " \t\n'(")
|
||
(buffer-substring-no-properties (point)
|
||
(progn (forward-sexp 1)
|
||
(point)))))))
|
||
|
||
(defvar lisp-mode-shared-map
|
||
(let ((map (make-sparse-keymap)))
|
||
(set-keymap-parent map prog-mode-map)
|
||
(define-key map "\e\C-q" 'indent-sexp)
|
||
(define-key map "\177" 'backward-delete-char-untabify)
|
||
;; This gets in the way when viewing a Lisp file in view-mode. As
|
||
;; long as [backspace] is mapped into DEL via the
|
||
;; function-key-map, this should remain disabled!!
|
||
;;;(define-key map [backspace] 'backward-delete-char-untabify)
|
||
map)
|
||
"Keymap for commands shared by all sorts of Lisp modes.")
|
||
|
||
(defcustom lisp-mode-hook nil
|
||
"Hook run when entering Lisp mode."
|
||
:options '(imenu-add-menubar-index)
|
||
:type 'hook
|
||
:group 'lisp)
|
||
|
||
(defcustom lisp-interaction-mode-hook nil
|
||
"Hook run when entering Lisp Interaction mode."
|
||
:options '(eldoc-mode)
|
||
:type 'hook
|
||
:group 'lisp)
|
||
|
||
;;; Generic Lisp mode.
|
||
|
||
(defvar lisp-mode-map
|
||
(let ((map (make-sparse-keymap))
|
||
(menu-map (make-sparse-keymap "Lisp")))
|
||
(set-keymap-parent map lisp-mode-shared-map)
|
||
(define-key map "\e\C-x" 'lisp-eval-defun)
|
||
(define-key map "\C-c\C-z" 'run-lisp)
|
||
(bindings--define-key map [menu-bar lisp] (cons "Lisp" menu-map))
|
||
(bindings--define-key menu-map [run-lisp]
|
||
'(menu-item "Run inferior Lisp" run-lisp
|
||
:help "Run an inferior Lisp process, input and output via buffer `*inferior-lisp*'"))
|
||
(bindings--define-key menu-map [ev-def]
|
||
'(menu-item "Eval defun" lisp-eval-defun
|
||
:help "Send the current defun to the Lisp process made by M-x run-lisp"))
|
||
(bindings--define-key menu-map [ind-sexp]
|
||
'(menu-item "Indent sexp" indent-sexp
|
||
:help "Indent each line of the list starting just after point"))
|
||
map)
|
||
"Keymap for ordinary Lisp mode.
|
||
All commands in `lisp-mode-shared-map' are inherited by this map.")
|
||
|
||
(define-derived-mode lisp-mode prog-mode "Lisp"
|
||
"Major mode for editing Lisp code for Lisps other than GNU Emacs Lisp.
|
||
Commands:
|
||
Delete converts tabs to spaces as it moves back.
|
||
Blank lines separate paragraphs. Semicolons start comments.
|
||
|
||
\\{lisp-mode-map}
|
||
Note that `run-lisp' may be used either to start an inferior Lisp job
|
||
or to switch back to an existing one."
|
||
(lisp-mode-variables nil t)
|
||
(setq-local find-tag-default-function 'lisp-find-tag-default)
|
||
(setq-local comment-start-skip
|
||
"\\(\\(^\\|[^\\\\\n]\\)\\(\\\\\\\\\\)*\\)\\(;+\\|#|\\) *")
|
||
(setq imenu-case-fold-search t))
|
||
|
||
(defun lisp-find-tag-default ()
|
||
(let ((default (find-tag-default)))
|
||
(when (stringp default)
|
||
(if (string-match ":+" default)
|
||
(substring default (match-end 0))
|
||
default))))
|
||
|
||
;; Used in old LispM code.
|
||
(defalias 'common-lisp-mode 'lisp-mode)
|
||
|
||
(autoload 'lisp-eval-defun "inf-lisp" nil t)
|
||
|
||
(defun lisp-comment-indent ()
|
||
"Like `comment-indent-default', but don't put space after open paren."
|
||
(or (when (looking-at "\\s<\\s<")
|
||
(let ((pt (point)))
|
||
(skip-syntax-backward " ")
|
||
(if (eq (preceding-char) ?\()
|
||
(cons (current-column) (current-column))
|
||
(goto-char pt)
|
||
nil)))
|
||
(comment-indent-default)))
|
||
|
||
(define-obsolete-function-alias 'lisp-mode-auto-fill 'do-auto-fill "23.1")
|
||
|
||
(defcustom lisp-indent-offset nil
|
||
"If non-nil, indent second line of expressions that many more columns."
|
||
:group 'lisp
|
||
:type '(choice (const nil) integer))
|
||
(put 'lisp-indent-offset 'safe-local-variable
|
||
(lambda (x) (or (null x) (integerp x))))
|
||
|
||
(defcustom lisp-indent-function 'lisp-indent-function
|
||
"A function to be called by `calculate-lisp-indent'.
|
||
It indents the arguments of a Lisp function call. This function
|
||
should accept two arguments: the indent-point, and the
|
||
`parse-partial-sexp' state at that position. One option for this
|
||
function is `common-lisp-indent-function'."
|
||
:type 'function
|
||
:group 'lisp)
|
||
|
||
(defun lisp-ppss (&optional pos)
|
||
"Return Parse-Partial-Sexp State at POS, defaulting to point.
|
||
Like `syntax-ppss' but includes the character address of the last
|
||
complete sexp in the innermost containing list at position
|
||
2 (counting from 0). This is important for lisp indentation."
|
||
(unless pos (setq pos (point)))
|
||
(let ((pss (syntax-ppss pos)))
|
||
(if (nth 9 pss)
|
||
(let ((sexp-start (car (last (nth 9 pss)))))
|
||
(parse-partial-sexp sexp-start pos nil nil (syntax-ppss sexp-start)))
|
||
pss)))
|
||
|
||
(cl-defstruct (lisp-indent-state
|
||
(:constructor nil)
|
||
(:constructor lisp-indent-initial-state
|
||
(&aux (ppss (lisp-ppss))
|
||
(ppss-point (point))
|
||
(stack (make-list (1+ (car ppss)) nil)))))
|
||
stack ;; Cached indentation, per depth.
|
||
ppss
|
||
ppss-point)
|
||
|
||
(defun lisp-indent-calc-next (state)
|
||
"Move to next line and return calculated indent for it.
|
||
STATE is updated by side effect, the first state should be
|
||
created by `lisp-indent-initial-state'. This function may move
|
||
by more than one line to cross a string literal."
|
||
(pcase-let* (((cl-struct lisp-indent-state
|
||
(stack indent-stack) ppss ppss-point)
|
||
state)
|
||
(indent-depth (car ppss)) ; Corresponding to indent-stack.
|
||
(depth indent-depth))
|
||
;; Parse this line so we can learn the state to indent the
|
||
;; next line.
|
||
(while (let ((last-sexp (nth 2 ppss)))
|
||
(setq ppss (parse-partial-sexp
|
||
ppss-point (progn (end-of-line) (point))
|
||
nil nil ppss))
|
||
;; Preserve last sexp of state (position 2) for
|
||
;; `calculate-lisp-indent', if we're at the same depth.
|
||
(if (and (not (nth 2 ppss)) (= depth (car ppss)))
|
||
(setf (nth 2 ppss) last-sexp)
|
||
(setq last-sexp (nth 2 ppss)))
|
||
(setq depth (car ppss))
|
||
;; Skip over newlines within strings.
|
||
(nth 3 ppss))
|
||
(let ((string-start (nth 8 ppss)))
|
||
(setq ppss (parse-partial-sexp (point) (point-max)
|
||
nil nil ppss 'syntax-table))
|
||
(setf (nth 2 ppss) string-start) ; Finished a complete string.
|
||
(setq depth (car ppss)))
|
||
(setq ppss-point (point)))
|
||
(setq ppss-point (point))
|
||
(let* ((depth-delta (- depth indent-depth)))
|
||
(cond ((< depth-delta 0)
|
||
(setq indent-stack (nthcdr (- depth-delta) indent-stack)))
|
||
((> depth-delta 0)
|
||
(setq indent-stack (nconc (make-list depth-delta nil)
|
||
indent-stack)))))
|
||
(prog1
|
||
(let (indent)
|
||
(cond ((= (forward-line 1) 1) nil)
|
||
;; Negative depth, probably some kind of syntax error.
|
||
((null indent-stack)
|
||
;; Reset state.
|
||
(setq ppss (parse-partial-sexp (point) (point))))
|
||
((car indent-stack))
|
||
((integerp (setq indent (calculate-lisp-indent ppss)))
|
||
(setf (car indent-stack) indent))
|
||
((consp indent) ; (COLUMN CONTAINING-SEXP-START)
|
||
(car indent))
|
||
;; This only happens if we're in a string.
|
||
(t (error "This shouldn't happen"))))
|
||
(setf (lisp-indent-state-stack state) indent-stack)
|
||
(setf (lisp-indent-state-ppss-point state) ppss-point)
|
||
(setf (lisp-indent-state-ppss state) ppss))))
|
||
|
||
(defun lisp-indent-region (start end)
|
||
"Indent region as Lisp code, efficiently."
|
||
(save-excursion
|
||
(setq end (copy-marker end))
|
||
(goto-char start)
|
||
(beginning-of-line)
|
||
;; The default `indent-region-line-by-line' doesn't hold a running
|
||
;; parse state, which forces each indent call to reparse from the
|
||
;; beginning. That has O(n^2) complexity.
|
||
(let* ((parse-state (lisp-indent-initial-state))
|
||
(pr (unless (minibufferp)
|
||
(make-progress-reporter "Indenting region..." (point) end))))
|
||
(let ((ppss (lisp-indent-state-ppss parse-state)))
|
||
(unless (or (and (bolp) (eolp)) (nth 3 ppss))
|
||
(lisp-indent-line (calculate-lisp-indent ppss))))
|
||
(let ((indent nil))
|
||
(while (progn (setq indent (lisp-indent-calc-next parse-state))
|
||
(< (point) end))
|
||
(unless (or (and (bolp) (eolp)) (not indent))
|
||
(lisp-indent-line indent))
|
||
(and pr (progress-reporter-update pr (point)))))
|
||
(and pr (progress-reporter-done pr))
|
||
(move-marker end nil))))
|
||
|
||
(defun lisp-indent-line (&optional indent)
|
||
"Indent current line as Lisp code."
|
||
(interactive)
|
||
(let ((pos (- (point-max) (point)))
|
||
(indent (progn (beginning-of-line)
|
||
(or indent (calculate-lisp-indent (lisp-ppss))))))
|
||
(skip-chars-forward " \t")
|
||
(if (or (null indent) (looking-at "\\s<\\s<\\s<"))
|
||
;; Don't alter indentation of a ;;; comment line
|
||
;; or a line that starts in a string.
|
||
;; FIXME: inconsistency: comment-indent moves ;;; to column 0.
|
||
(goto-char (- (point-max) pos))
|
||
(if (and (looking-at "\\s<") (not (looking-at "\\s<\\s<")))
|
||
;; Single-semicolon comment lines should be indented
|
||
;; as comment lines, not as code.
|
||
(progn (indent-for-comment) (forward-char -1))
|
||
(if (listp indent) (setq indent (car indent)))
|
||
(indent-line-to indent))
|
||
;; If initial point was within line's indentation,
|
||
;; position after the indentation. Else stay at same point in text.
|
||
(if (> (- (point-max) pos) (point))
|
||
(goto-char (- (point-max) pos))))))
|
||
|
||
(defvar calculate-lisp-indent-last-sexp)
|
||
|
||
(defun calculate-lisp-indent (&optional parse-start)
|
||
"Return appropriate indentation for current line as Lisp code.
|
||
In usual case returns an integer: the column to indent to.
|
||
If the value is nil, that means don't change the indentation
|
||
because the line starts inside a string.
|
||
|
||
PARSE-START may be a buffer position to start parsing from, or a
|
||
parse state as returned by calling `parse-partial-sexp' up to the
|
||
beginning of the current line.
|
||
|
||
The value can also be a list of the form (COLUMN CONTAINING-SEXP-START).
|
||
This means that following lines at the same level of indentation
|
||
should not necessarily be indented the same as this line.
|
||
Then COLUMN is the column to indent to, and CONTAINING-SEXP-START
|
||
is the buffer position of the start of the containing expression."
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(let ((indent-point (point))
|
||
state
|
||
;; setting this to a number inhibits calling hook
|
||
(desired-indent nil)
|
||
(retry t)
|
||
calculate-lisp-indent-last-sexp containing-sexp)
|
||
(cond ((or (markerp parse-start) (integerp parse-start))
|
||
(goto-char parse-start))
|
||
((null parse-start) (beginning-of-defun))
|
||
(t (setq state parse-start)))
|
||
(unless state
|
||
;; Find outermost containing sexp
|
||
(while (< (point) indent-point)
|
||
(setq state (parse-partial-sexp (point) indent-point 0))))
|
||
;; Find innermost containing sexp
|
||
(while (and retry
|
||
state
|
||
(> (elt state 0) 0))
|
||
(setq retry nil)
|
||
(setq calculate-lisp-indent-last-sexp (elt state 2))
|
||
(setq containing-sexp (elt state 1))
|
||
;; Position following last unclosed open.
|
||
(goto-char (1+ containing-sexp))
|
||
;; Is there a complete sexp since then?
|
||
(if (and calculate-lisp-indent-last-sexp
|
||
(> calculate-lisp-indent-last-sexp (point)))
|
||
;; Yes, but is there a containing sexp after that?
|
||
(let ((peek (parse-partial-sexp calculate-lisp-indent-last-sexp
|
||
indent-point 0)))
|
||
(if (setq retry (car (cdr peek))) (setq state peek)))))
|
||
(if retry
|
||
nil
|
||
;; Innermost containing sexp found
|
||
(goto-char (1+ containing-sexp))
|
||
(if (not calculate-lisp-indent-last-sexp)
|
||
;; indent-point immediately follows open paren.
|
||
;; Don't call hook.
|
||
(setq desired-indent (current-column))
|
||
;; Find the start of first element of containing sexp.
|
||
(parse-partial-sexp (point) calculate-lisp-indent-last-sexp 0 t)
|
||
(cond ((looking-at "\\s(")
|
||
;; First element of containing sexp is a list.
|
||
;; Indent under that list.
|
||
)
|
||
((> (save-excursion (forward-line 1) (point))
|
||
calculate-lisp-indent-last-sexp)
|
||
;; This is the first line to start within the containing sexp.
|
||
;; It's almost certainly a function call.
|
||
(if (= (point) calculate-lisp-indent-last-sexp)
|
||
;; Containing sexp has nothing before this line
|
||
;; except the first element. Indent under that element.
|
||
nil
|
||
;; Skip the first element, find start of second (the first
|
||
;; argument of the function call) and indent under.
|
||
(progn (forward-sexp 1)
|
||
(parse-partial-sexp (point)
|
||
calculate-lisp-indent-last-sexp
|
||
0 t)))
|
||
(backward-prefix-chars))
|
||
(t
|
||
;; Indent beneath first sexp on same line as
|
||
;; `calculate-lisp-indent-last-sexp'. Again, it's
|
||
;; almost certainly a function call.
|
||
(goto-char calculate-lisp-indent-last-sexp)
|
||
(beginning-of-line)
|
||
(parse-partial-sexp (point) calculate-lisp-indent-last-sexp
|
||
0 t)
|
||
(backward-prefix-chars)))))
|
||
;; Point is at the point to indent under unless we are inside a string.
|
||
;; Call indentation hook except when overridden by lisp-indent-offset
|
||
;; or if the desired indentation has already been computed.
|
||
(let ((normal-indent (current-column)))
|
||
(cond ((elt state 3)
|
||
;; Inside a string, don't change indentation.
|
||
nil)
|
||
((and (integerp lisp-indent-offset) containing-sexp)
|
||
;; Indent by constant offset
|
||
(goto-char containing-sexp)
|
||
(+ (current-column) lisp-indent-offset))
|
||
;; in this case calculate-lisp-indent-last-sexp is not nil
|
||
(calculate-lisp-indent-last-sexp
|
||
(or
|
||
;; try to align the parameters of a known function
|
||
(and lisp-indent-function
|
||
(not retry)
|
||
(funcall lisp-indent-function indent-point state))
|
||
;; If the function has no special alignment
|
||
;; or it does not apply to this argument,
|
||
;; try to align a constant-symbol under the last
|
||
;; preceding constant symbol, if there is such one of
|
||
;; the last 2 preceding symbols, in the previous
|
||
;; uncommented line.
|
||
(and (save-excursion
|
||
(goto-char indent-point)
|
||
(skip-chars-forward " \t")
|
||
(looking-at ":"))
|
||
;; The last sexp may not be at the indentation
|
||
;; where it begins, so find that one, instead.
|
||
(save-excursion
|
||
(goto-char calculate-lisp-indent-last-sexp)
|
||
;; Handle prefix characters and whitespace
|
||
;; following an open paren. (Bug#1012)
|
||
(backward-prefix-chars)
|
||
(while (not (or (looking-back "^[ \t]*\\|([ \t]+"
|
||
(line-beginning-position))
|
||
(and containing-sexp
|
||
(>= (1+ containing-sexp) (point)))))
|
||
(forward-sexp -1)
|
||
(backward-prefix-chars))
|
||
(setq calculate-lisp-indent-last-sexp (point)))
|
||
(> calculate-lisp-indent-last-sexp
|
||
(save-excursion
|
||
(goto-char (1+ containing-sexp))
|
||
(parse-partial-sexp (point) calculate-lisp-indent-last-sexp 0 t)
|
||
(point)))
|
||
(let ((parse-sexp-ignore-comments t)
|
||
indent)
|
||
(goto-char calculate-lisp-indent-last-sexp)
|
||
(or (and (looking-at ":")
|
||
(setq indent (current-column)))
|
||
(and (< (line-beginning-position)
|
||
(prog2 (backward-sexp) (point)))
|
||
(looking-at ":")
|
||
(setq indent (current-column))))
|
||
indent))
|
||
;; another symbols or constants not preceded by a constant
|
||
;; as defined above.
|
||
normal-indent))
|
||
;; in this case calculate-lisp-indent-last-sexp is nil
|
||
(desired-indent)
|
||
(t
|
||
normal-indent))))))
|
||
|
||
(defun lisp-indent-function (indent-point state)
|
||
"This function is the normal value of the variable `lisp-indent-function'.
|
||
The function `calculate-lisp-indent' calls this to determine
|
||
if the arguments of a Lisp function call should be indented specially.
|
||
|
||
INDENT-POINT is the position at which the line being indented begins.
|
||
Point is located at the point to indent under (for default indentation);
|
||
STATE is the `parse-partial-sexp' state for that position.
|
||
|
||
If the current line is in a call to a Lisp function that has a non-nil
|
||
property `lisp-indent-function' (or the deprecated `lisp-indent-hook'),
|
||
it specifies how to indent. The property value can be:
|
||
|
||
* `defun', meaning indent `defun'-style
|
||
(this is also the case if there is no property and the function
|
||
has a name that begins with \"def\", and three or more arguments);
|
||
|
||
* an integer N, meaning indent the first N arguments specially
|
||
(like ordinary function arguments), and then indent any further
|
||
arguments like a body;
|
||
|
||
* a function to call that returns the indentation (or nil).
|
||
`lisp-indent-function' calls this function with the same two arguments
|
||
that it itself received.
|
||
|
||
This function returns either the indentation to use, or nil if the
|
||
Lisp function does not specify a special indentation."
|
||
(let ((normal-indent (current-column)))
|
||
(goto-char (1+ (elt state 1)))
|
||
(parse-partial-sexp (point) calculate-lisp-indent-last-sexp 0 t)
|
||
(if (and (elt state 2)
|
||
(not (looking-at "\\sw\\|\\s_")))
|
||
;; car of form doesn't seem to be a symbol
|
||
(progn
|
||
(if (not (> (save-excursion (forward-line 1) (point))
|
||
calculate-lisp-indent-last-sexp))
|
||
(progn (goto-char calculate-lisp-indent-last-sexp)
|
||
(beginning-of-line)
|
||
(parse-partial-sexp (point)
|
||
calculate-lisp-indent-last-sexp 0 t)))
|
||
;; Indent under the list or under the first sexp on the same
|
||
;; line as calculate-lisp-indent-last-sexp. Note that first
|
||
;; thing on that line has to be complete sexp since we are
|
||
;; inside the innermost containing sexp.
|
||
(backward-prefix-chars)
|
||
(current-column))
|
||
(let ((function (buffer-substring (point)
|
||
(progn (forward-sexp 1) (point))))
|
||
method)
|
||
(setq method (or (function-get (intern-soft function)
|
||
'lisp-indent-function)
|
||
(get (intern-soft function) 'lisp-indent-hook)))
|
||
(cond ((or (eq method 'defun)
|
||
(and (null method)
|
||
(> (length function) 3)
|
||
(string-match "\\`def" function)))
|
||
(lisp-indent-defform state indent-point))
|
||
((integerp method)
|
||
(lisp-indent-specform method state
|
||
indent-point normal-indent))
|
||
(method
|
||
(funcall method indent-point state)))))))
|
||
|
||
(defcustom lisp-body-indent 2
|
||
"Number of columns to indent the second line of a `(def...)' form."
|
||
:group 'lisp
|
||
:type 'integer)
|
||
(put 'lisp-body-indent 'safe-local-variable 'integerp)
|
||
|
||
(defun lisp-indent-specform (count state indent-point normal-indent)
|
||
(let ((containing-form-start (elt state 1))
|
||
(i count)
|
||
body-indent containing-form-column)
|
||
;; Move to the start of containing form, calculate indentation
|
||
;; to use for non-distinguished forms (> count), and move past the
|
||
;; function symbol. lisp-indent-function guarantees that there is at
|
||
;; least one word or symbol character following open paren of containing
|
||
;; form.
|
||
(goto-char containing-form-start)
|
||
(setq containing-form-column (current-column))
|
||
(setq body-indent (+ lisp-body-indent containing-form-column))
|
||
(forward-char 1)
|
||
(forward-sexp 1)
|
||
;; Now find the start of the last form.
|
||
(parse-partial-sexp (point) indent-point 1 t)
|
||
(while (and (< (point) indent-point)
|
||
(condition-case ()
|
||
(progn
|
||
(setq count (1- count))
|
||
(forward-sexp 1)
|
||
(parse-partial-sexp (point) indent-point 1 t))
|
||
(error nil))))
|
||
;; Point is sitting on first character of last (or count) sexp.
|
||
(if (> count 0)
|
||
;; A distinguished form. If it is the first or second form use double
|
||
;; lisp-body-indent, else normal indent. With lisp-body-indent bound
|
||
;; to 2 (the default), this just happens to work the same with if as
|
||
;; the older code, but it makes unwind-protect, condition-case,
|
||
;; with-output-to-temp-buffer, et. al. much more tasteful. The older,
|
||
;; less hacked, behavior can be obtained by replacing below with
|
||
;; (list normal-indent containing-form-start).
|
||
(if (<= (- i count) 1)
|
||
(list (+ containing-form-column (* 2 lisp-body-indent))
|
||
containing-form-start)
|
||
(list normal-indent containing-form-start))
|
||
;; A non-distinguished form. Use body-indent if there are no
|
||
;; distinguished forms and this is the first undistinguished form,
|
||
;; or if this is the first undistinguished form and the preceding
|
||
;; distinguished form has indentation at least as great as body-indent.
|
||
(if (or (and (= i 0) (= count 0))
|
||
(and (= count 0) (<= body-indent normal-indent)))
|
||
body-indent
|
||
normal-indent))))
|
||
|
||
(defun lisp-indent-defform (state _indent-point)
|
||
(goto-char (car (cdr state)))
|
||
(forward-line 1)
|
||
(if (> (point) (car (cdr (cdr state))))
|
||
(progn
|
||
(goto-char (car (cdr state)))
|
||
(+ lisp-body-indent (current-column)))))
|
||
|
||
|
||
;; (put 'progn 'lisp-indent-function 0), say, causes progn to be indented
|
||
;; like defun if the first form is placed on the next line, otherwise
|
||
;; it is indented like any other form (i.e. forms line up under first).
|
||
|
||
(put 'autoload 'lisp-indent-function 'defun) ;Elisp
|
||
(put 'progn 'lisp-indent-function 0)
|
||
(put 'prog1 'lisp-indent-function 1)
|
||
(put 'save-excursion 'lisp-indent-function 0) ;Elisp
|
||
(put 'save-restriction 'lisp-indent-function 0) ;Elisp
|
||
(put 'save-current-buffer 'lisp-indent-function 0) ;Elisp
|
||
(put 'let 'lisp-indent-function 1)
|
||
(put 'let* 'lisp-indent-function 1)
|
||
(put 'while 'lisp-indent-function 1)
|
||
(put 'if 'lisp-indent-function 2)
|
||
(put 'catch 'lisp-indent-function 1)
|
||
(put 'condition-case 'lisp-indent-function 2)
|
||
(put 'handler-case 'lisp-indent-function 1) ;CL
|
||
(put 'handler-bind 'lisp-indent-function 1) ;CL
|
||
(put 'unwind-protect 'lisp-indent-function 1)
|
||
(put 'with-output-to-temp-buffer 'lisp-indent-function 1)
|
||
|
||
(defun indent-sexp (&optional endpos)
|
||
"Indent each line of the list starting just after point.
|
||
If optional arg ENDPOS is given, indent each line, stopping when
|
||
ENDPOS is encountered."
|
||
(interactive)
|
||
(let* ((parse-state (lisp-indent-initial-state)))
|
||
;; We need a marker because we modify the buffer
|
||
;; text preceding endpos.
|
||
(setq endpos (copy-marker
|
||
(if endpos endpos
|
||
;; Get error now if we don't have a complete sexp
|
||
;; after point.
|
||
(save-excursion
|
||
(forward-sexp 1)
|
||
(let ((eol (line-end-position)))
|
||
;; We actually look for a sexp which ends
|
||
;; after the current line so that we properly
|
||
;; indent things like #s(...). This might not
|
||
;; be needed if Bug#15998 is fixed.
|
||
(when (and (< (point) eol)
|
||
;; Check if eol is within a sexp.
|
||
(> (nth 0 (save-excursion
|
||
(parse-partial-sexp
|
||
(point) eol)))
|
||
0))
|
||
(condition-case ()
|
||
(while (< (point) eol)
|
||
(forward-sexp 1))
|
||
;; But don't signal an error for incomplete
|
||
;; sexps following the first complete sexp
|
||
;; after point.
|
||
(scan-error nil))))
|
||
(point)))))
|
||
(save-excursion
|
||
(while (let ((indent (lisp-indent-calc-next parse-state))
|
||
(ppss (lisp-indent-state-ppss parse-state)))
|
||
;; If the line contains a comment indent it now with
|
||
;; `indent-for-comment'.
|
||
(when (and (nth 4 ppss) (<= (nth 8 ppss) endpos))
|
||
(save-excursion
|
||
(goto-char (lisp-indent-state-ppss-point parse-state))
|
||
(indent-for-comment)
|
||
(setf (lisp-indent-state-ppss-point parse-state)
|
||
(line-end-position))))
|
||
(when (< (point) endpos)
|
||
;; Indent the next line, unless it's blank, or just a
|
||
;; comment (we will `indent-for-comment' the latter).
|
||
(skip-chars-forward " \t")
|
||
(unless (or (eolp) (not indent)
|
||
(eq (char-syntax (char-after)) ?<))
|
||
(indent-line-to indent))
|
||
t))))
|
||
(move-marker endpos nil)))
|
||
|
||
(defun indent-pp-sexp (&optional arg)
|
||
"Indent each line of the list starting just after point, or prettyprint it.
|
||
A prefix argument specifies pretty-printing."
|
||
(interactive "P")
|
||
(if arg
|
||
(save-excursion
|
||
(save-restriction
|
||
(narrow-to-region (point) (progn (forward-sexp 1) (point)))
|
||
(pp-buffer)
|
||
(goto-char (point-max))
|
||
(if (eq (char-before) ?\n)
|
||
(delete-char -1)))))
|
||
(indent-sexp))
|
||
|
||
;;;; Lisp paragraph filling commands.
|
||
|
||
(defcustom emacs-lisp-docstring-fill-column 65
|
||
"Value of `fill-column' to use when filling a docstring.
|
||
Any non-integer value means do not use a different value of
|
||
`fill-column' when filling docstrings."
|
||
:type '(choice (integer)
|
||
(const :tag "Use the current `fill-column'" t))
|
||
:group 'lisp)
|
||
(put 'emacs-lisp-docstring-fill-column 'safe-local-variable
|
||
(lambda (x) (or (eq x t) (integerp x))))
|
||
|
||
(defun lisp-fill-paragraph (&optional justify)
|
||
"Like \\[fill-paragraph], but handle Emacs Lisp comments and docstrings.
|
||
If any of the current line is a comment, fill the comment or the
|
||
paragraph of it that point is in, preserving the comment's indentation
|
||
and initial semicolons."
|
||
(interactive "P")
|
||
(or (fill-comment-paragraph justify)
|
||
;; Since fill-comment-paragraph returned nil, that means we're not in
|
||
;; a comment: Point is on a program line; we are interested
|
||
;; particularly in docstring lines.
|
||
;;
|
||
;; We bind `paragraph-start' and `paragraph-separate' temporarily. They
|
||
;; are buffer-local, but we avoid changing them so that they can be set
|
||
;; to make `forward-paragraph' and friends do something the user wants.
|
||
;;
|
||
;; `paragraph-start': The `(' in the character alternative and the
|
||
;; left-singlequote plus `(' sequence after the \\| alternative prevent
|
||
;; sexps and backquoted sexps that follow a docstring from being filled
|
||
;; with the docstring. This setting has the consequence of inhibiting
|
||
;; filling many program lines that are not docstrings, which is sensible,
|
||
;; because the user probably asked to fill program lines by accident, or
|
||
;; expecting indentation (perhaps we should try to do indenting in that
|
||
;; case). The `;' and `:' stop the paragraph being filled at following
|
||
;; comment lines and at keywords (e.g., in `defcustom'). Left parens are
|
||
;; escaped to keep font-locking, filling, & paren matching in the source
|
||
;; file happy. The `:' must be preceded by whitespace so that keywords
|
||
;; inside of the docstring don't start new paragraphs (Bug#7751).
|
||
;;
|
||
;; `paragraph-separate': A clever regexp distinguishes the first line of
|
||
;; a docstring and identifies it as a paragraph separator, so that it
|
||
;; won't be filled. (Since the first line of documentation stands alone
|
||
;; in some contexts, filling should not alter the contents the author has
|
||
;; chosen.) Only the first line of a docstring begins with whitespace
|
||
;; and a quotation mark and ends with a period or (rarely) a comma.
|
||
;;
|
||
;; The `fill-column' is temporarily bound to
|
||
;; `emacs-lisp-docstring-fill-column' if that value is an integer.
|
||
(let ((paragraph-start
|
||
(concat paragraph-start
|
||
"\\|\\s-*\\([(;\"]\\|\\s-:\\|`(\\|#'(\\)"))
|
||
(paragraph-separate
|
||
(concat paragraph-separate "\\|\\s-*\".*[,\\.]$"))
|
||
(fill-column (if (and (integerp emacs-lisp-docstring-fill-column)
|
||
(derived-mode-p 'emacs-lisp-mode))
|
||
emacs-lisp-docstring-fill-column
|
||
fill-column)))
|
||
(fill-paragraph justify))
|
||
;; Never return nil.
|
||
t))
|
||
|
||
(defun indent-code-rigidly (start end arg &optional nochange-regexp)
|
||
"Indent all lines of code, starting in the region, sideways by ARG columns.
|
||
Does not affect lines starting inside comments or strings, assuming that
|
||
the start of the region is not inside them.
|
||
|
||
Called from a program, takes args START, END, COLUMNS and NOCHANGE-REGEXP.
|
||
The last is a regexp which, if matched at the beginning of a line,
|
||
means don't indent that line."
|
||
(interactive "r\np")
|
||
(let (state)
|
||
(save-excursion
|
||
(goto-char end)
|
||
(setq end (point-marker))
|
||
(goto-char start)
|
||
(or (bolp)
|
||
(setq state (parse-partial-sexp (point)
|
||
(progn
|
||
(forward-line 1) (point))
|
||
nil nil state)))
|
||
(while (< (point) end)
|
||
(or (car (nthcdr 3 state))
|
||
(and nochange-regexp
|
||
(looking-at nochange-regexp))
|
||
;; If line does not start in string, indent it
|
||
(let ((indent (current-indentation)))
|
||
(delete-region (point) (progn (skip-chars-forward " \t") (point)))
|
||
(or (eolp)
|
||
(indent-to (max 0 (+ indent arg)) 0))))
|
||
(setq state (parse-partial-sexp (point)
|
||
(progn
|
||
(forward-line 1) (point))
|
||
nil nil state))))))
|
||
|
||
(provide 'lisp-mode)
|
||
|
||
;;; lisp-mode.el ends here
|