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lisp-mode.el
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;;; lisp-mode.el --- Lisp mode, and its idiosyncratic commands -*- lexical-binding:t -*-
;; Copyright (C) 1985-1986, 1999-2023 Free Software Foundation, Inc.
;; Maintainer: [email protected]
;; Keywords: lisp, languages
;; Package: emacs
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; The base major mode for editing Lisp code (used also for Emacs Lisp).
;; This mode is documented in the Emacs manual.
;;; Code:
(eval-when-compile (require 'cl-lib))
(eval-when-compile (require 'subr-x))
(defvar font-lock-comment-face)
(defvar font-lock-doc-face)
(defvar font-lock-keywords-case-fold-search)
(defvar font-lock-string-face)
(define-abbrev-table 'lisp-mode-abbrev-table ()
"Abbrev table for Lisp mode.")
(defvar lisp-data-mode-syntax-table
(let ((table (make-syntax-table))
(i 0))
(while (< i ?0)
(modify-syntax-entry i "_ " table)
(setq i (1+ i)))
(setq i (1+ ?9))
(while (< i ?A)
(modify-syntax-entry i "_ " table)
(setq i (1+ i)))
(setq i (1+ ?Z))
(while (< i ?a)
(modify-syntax-entry i "_ " table)
(setq i (1+ i)))
(setq i (1+ ?z))
(while (< i 128)
(modify-syntax-entry i "_ " table)
(setq i (1+ i)))
(modify-syntax-entry ?\s " " table)
;; Non-break space acts as whitespace.
(modify-syntax-entry ?\xa0 " " table)
(modify-syntax-entry ?\t " " table)
(modify-syntax-entry ?\f " " table)
(modify-syntax-entry ?\n "> " table)
(modify-syntax-entry ?\; "< " table)
(modify-syntax-entry ?` "' " table)
(modify-syntax-entry ?' "' " table)
(modify-syntax-entry ?, "' " table)
(modify-syntax-entry ?@ "_ p" table)
;; Used to be singlequote; changed for flonums.
(modify-syntax-entry ?. "_ " table)
(modify-syntax-entry ?# "' " table)
(modify-syntax-entry ?\" "\" " table)
(modify-syntax-entry ?\\ "\\ " table)
(modify-syntax-entry ?\( "() " table)
(modify-syntax-entry ?\) ")( " table)
(modify-syntax-entry ?\[ "(]" table)
(modify-syntax-entry ?\] ")[" table)
table)
"Parent syntax table used in Lisp modes.")
(defvar lisp-mode-syntax-table
(let ((table (make-syntax-table lisp-data-mode-syntax-table)))
(modify-syntax-entry ?\[ "_ " table)
(modify-syntax-entry ?\] "_ " table)
(modify-syntax-entry ?# "' 14" table)
(modify-syntax-entry ?| "\" 23bn" table)
table)
"Syntax table used in `lisp-mode'.")
(rx-define lisp-mode-symbol (+ (| (syntax word)
(syntax symbol)
(: "\\" nonl))))
(eval-and-compile
(defconst lisp-mode-symbol-regexp (rx lisp-mode-symbol)))
(defvar lisp-imenu-generic-expression
(list
(list nil
(purecopy (concat "^\\s-*("
(regexp-opt
'("defun" "defmacro"
;; Elisp.
"defun*" "defsubst" "define-inline"
"define-advice" "defadvice" "define-skeleton"
"define-compilation-mode" "define-minor-mode"
"define-global-minor-mode"
"define-globalized-minor-mode"
"define-derived-mode" "define-generic-mode"
"ert-deftest"
"cl-defun" "cl-defsubst" "cl-defmacro"
"cl-define-compiler-macro" "cl-defgeneric"
"cl-defmethod"
;; CL.
"define-compiler-macro" "define-modify-macro"
"defsetf" "define-setf-expander"
"define-method-combination"
;; CLOS and EIEIO
"defgeneric" "defmethod")
t)
"\\s-+\\(" (rx lisp-mode-symbol) "\\)"))
2)
;; Like the previous, but uses a quoted symbol as the name.
(list nil
(purecopy (concat "^\\s-*("
(regexp-opt
'("defalias" "define-obsolete-function-alias")
t)
"\\s-+'\\(" (rx lisp-mode-symbol) "\\)"))
2)
(list (purecopy "Variables")
(purecopy (concat "^\\s-*("
(regexp-opt
'(;; Elisp
"defconst" "defcustom"
;; CL
"defconstant"
"defparameter" "define-symbol-macro")
t)
"\\s-+\\(" (rx lisp-mode-symbol) "\\)"))
2)
;; For `defvar'/`defvar-local', we ignore (defvar FOO) constructs.
(list (purecopy "Variables")
(purecopy (concat "^\\s-*(defvar\\(?:-local\\)?\\s-+\\("
(rx lisp-mode-symbol) "\\)"
"[[:space:]\n]+[^)]"))
1)
(list (purecopy "Types")
(purecopy (concat "^\\s-*("
(regexp-opt
'(;; Elisp
"defgroup" "deftheme"
"define-widget" "define-error"
"defface" "cl-deftype" "cl-defstruct"
;; CL
"deftype" "defstruct"
"define-condition" "defpackage"
;; CLOS and EIEIO
"defclass")
t)
"\\s-+'?\\(" (rx lisp-mode-symbol) "\\)"))
2))
"Imenu generic expression for Lisp mode. See `imenu-generic-expression'.")
(defconst lisp-mode-autoload-regexp
"^;;;###\\(\\([-[:alnum:]]+?\\)-\\)?\\(autoload\\)"
"Regexp to match autoload cookies.
The second group matches package names used to redirect autoloads
to a package-local <package>-loaddefs.el file.")
;; This was originally in autoload.el and is still used there.
(put 'autoload 'doc-string-elt 3)
(put 'defmethod 'doc-string-elt 3)
(put 'defvar 'doc-string-elt 3)
(put 'defconst 'doc-string-elt 3)
(put 'defalias 'doc-string-elt 3)
(put 'defvaralias 'doc-string-elt 3)
(put 'define-category 'doc-string-elt 2)
;; CL
(put 'defconstant 'doc-string-elt 3)
(put 'define-compiler-macro 'doc-string-elt 3)
(put 'define-setf-expander 'doc-string-elt 3)
(put 'defparameter 'doc-string-elt 3)
(put 'defstruct 'doc-string-elt 2)
(put 'deftype 'doc-string-elt 3)
(defvar lisp-doc-string-elt-property 'doc-string-elt
"The symbol property that holds the docstring position info.")
(defconst lisp-prettify-symbols-alist '(("lambda" . ?λ))
"Alist of symbol/\"pretty\" characters to be displayed.")
;;;; Font-lock support.
(defun lisp--match-hidden-arg (limit)
(let ((res nil))
(forward-line 0)
(while
(let ((ppss (parse-partial-sexp (point)
(line-end-position)
-1)))
(skip-syntax-forward " )")
(if (or (>= (car ppss) 0)
(eolp)
(looking-at ";")
(nth 8 (syntax-ppss))) ;Within a string or comment.
(progn
(forward-line 1)
(< (point) limit))
(looking-at ".*") ;Set the match-data.
(forward-line 1)
(setq res (point))
nil)))
res))
(defun lisp--el-non-funcall-position-p (pos)
"Heuristically determine whether POS is an evaluated position."
(declare (obsolete lisp--el-funcall-position-p "28.1"))
(not (lisp--el-funcall-position-p pos)))
(defun lisp--el-funcall-position-p (pos)
"Heuristically determine whether POS is an evaluated position."
(save-match-data
(save-excursion
(ignore-errors
(goto-char pos)
;; '(lambda ..) is not a funcall position, but #'(lambda ...) is.
(if (eql (char-before) ?\')
(eql (char-before (1- (point))) ?#)
(let* ((ppss (syntax-ppss))
(paren-posns (nth 9 ppss))
(parent
(when paren-posns
(goto-char (car (last paren-posns))) ;(up-list -1)
(cond
((ignore-errors
(and (eql (char-after) ?\()
(when (cdr paren-posns)
(goto-char (car (last paren-posns 2)))
(looking-at "(\\_<let\\*?\\_>"))))
(goto-char (match-end 0))
'let)
((looking-at
(rx "("
(group-n 1 (+ (or (syntax w) (syntax _))))
symbol-end))
(prog1 (intern-soft (match-string-no-properties 1))
(goto-char (match-end 1))))))))
(pcase parent
('declare nil)
('let
(forward-sexp 1)
(>= pos (point)))
((or 'defun 'defmacro 'cl-defmethod 'cl-defun)
(forward-sexp 2)
(>= pos (point)))
('condition-case
;; If (cdr paren-posns), then we're in the BODY
;; of HANDLERS.
(or (cdr paren-posns)
(progn
(forward-sexp 1)
;; If we're in the second form, then we're in
;; a funcall position.
(< (point) pos (progn (forward-sexp 1)
(point))))))
(_ t))))))))
(defun lisp--el-match-keyword (limit)
;; FIXME: Move to elisp-mode.el.
(catch 'found
(while (re-search-forward
(concat "(\\(" (rx lisp-mode-symbol) "\\)\\_>")
limit t)
(let ((sym (intern-soft (match-string 1))))
(when (and (or (special-form-p sym) (macrop sym))
(not (get sym 'no-font-lock-keyword))
(lisp--el-funcall-position-p (match-beginning 0)))
(throw 'found t))))))
(defmacro let-when-compile (bindings &rest body)
"Like `let*', but allow for compile time optimization.
Use BINDINGS as in regular `let*', but in BODY each usage should
be wrapped in `eval-when-compile'.
This will generate compile-time constants from BINDINGS."
(declare (indent 1) (debug let))
(letrec ((loop
(lambda (bindings)
(if (null bindings)
(macroexpand-all (macroexp-progn body)
macroexpand-all-environment)
(let ((binding (pop bindings)))
(cl-progv (list (car binding))
(list (eval (nth 1 binding) t))
(funcall loop bindings)))))))
(funcall loop bindings)))
(defun elisp--font-lock-backslash ()
(let* ((beg0 (match-beginning 0))
(end0 (match-end 0))
(ppss (save-excursion (syntax-ppss beg0))))
(and (nth 3 ppss) ;Inside a string.
(not (nth 5 ppss)) ;The \ is not itself \-escaped.
;; Don't highlight the \( introduced because of
;; `open-paren-in-column-0-is-defun-start'.
(not (eq ?\n (char-before beg0)))
(equal (ignore-errors
(car (read-from-string
(format "\"%s\""
(buffer-substring-no-properties
beg0 end0)))))
(buffer-substring-no-properties (1+ beg0) end0))
`(face ,font-lock-warning-face
help-echo "This \\ has no effect"))))
(defun lisp--match-confusable-symbol-character (limit)
;; Match a confusable character within a Lisp symbol.
(catch 'matched
(while t
(if (re-search-forward help-uni-confusables-regexp limit t)
;; Skip confusables which are backslash escaped, or inside
;; strings or comments.
(save-match-data
(unless (or (eq (char-before (match-beginning 0)) ?\\)
(nth 8 (syntax-ppss)))
(throw 'matched t)))
(throw 'matched nil)))))
(defun lisp-mode--search-key (char bound)
(catch 'found
(while (re-search-forward
(concat "\\_<" char (rx lisp-mode-symbol) "\\_>")
bound t)
(when (or (< (match-beginning 0) (+ (point-min) 2))
;; A quoted white space before the &/: means that this
;; is not the start of a :keyword or an &option.
(not (eql (char-after (- (match-beginning 0) 2))
?\\))
(not (memq (char-after (- (match-beginning 0) 1))
'(?\s ?\n ?\t))))
(throw 'found t)))))
(let-when-compile
((lisp-fdefs '("defmacro" "defun"))
(lisp-vdefs '("defvar"))
(lisp-kw '("cond" "if" "while" "let" "let*" "progn" "prog1"
"prog2" "lambda" "unwind-protect" "condition-case"
"when" "unless" "with-output-to-string"
"ignore-errors" "dotimes" "dolist" "declare"))
(lisp-errs '("warn" "error" "signal"))
;; Elisp constructs. Now they are update dynamically
;; from obarray but they are also used for setting up
;; the keywords for Common Lisp.
(el-fdefs '("defsubst" "cl-defsubst" "define-inline"
"define-advice" "defadvice" "defalias"
"define-derived-mode" "define-minor-mode"
"define-generic-mode" "define-global-minor-mode"
"define-globalized-minor-mode" "define-skeleton"
"define-widget" "ert-deftest"))
(el-vdefs '("defconst" "defcustom" "defvaralias" "defvar-local"
"defface"))
(el-tdefs '("defgroup" "deftheme"))
(el-errs '("user-error"))
;; Common-Lisp constructs supported by EIEIO. FIXME: namespace.
(eieio-fdefs '("defgeneric" "defmethod"))
(eieio-tdefs '("defclass"))
;; Common-Lisp constructs supported by cl-lib.
(cl-lib-fdefs '("defmacro" "defsubst" "defun" "defmethod" "defgeneric"))
(cl-lib-tdefs '("defstruct" "deftype"))
(cl-lib-errs '("assert" "check-type"))
;; Common-Lisp constructs not supported by cl-lib.
(cl-fdefs '("defsetf" "define-method-combination"
"define-condition" "define-setf-expander"
;; "define-function"??
"define-compiler-macro" "define-modify-macro"))
(cl-vdefs '("define-symbol-macro" "defconstant" "defparameter"))
(cl-tdefs '("defpackage" "defstruct" "deftype"))
(cl-kw '("block" "break" "case" "ccase" "compiler-let" "ctypecase"
"declaim" "destructuring-bind" "do" "do*"
"ecase" "etypecase" "eval-when" "flet" "flet*"
"go" "handler-case" "handler-bind" "in-package" ;; "inline"
"labels" "letf" "locally" "loop"
"macrolet" "multiple-value-bind" "multiple-value-prog1"
"proclaim" "prog" "prog*" "progv"
"restart-case" "restart-bind" "return" "return-from"
"symbol-macrolet" "tagbody" "the" "typecase"
"with-accessors" "with-compilation-unit"
"with-condition-restarts" "with-hash-table-iterator"
"with-input-from-string" "with-open-file"
"with-open-stream" "with-package-iterator"
"with-simple-restart" "with-slots" "with-standard-io-syntax"))
(cl-errs '("abort" "cerror")))
(let ((vdefs (eval-when-compile
(append lisp-vdefs el-vdefs cl-vdefs)))
(tdefs (eval-when-compile
(append el-tdefs eieio-tdefs cl-tdefs cl-lib-tdefs
(mapcar (lambda (s) (concat "cl-" s)) cl-lib-tdefs))))
;; Elisp and Common Lisp definers.
(el-defs-re (eval-when-compile
(regexp-opt (append lisp-fdefs lisp-vdefs
el-fdefs el-vdefs el-tdefs
(mapcar (lambda (s) (concat "cl-" s))
(append cl-lib-fdefs cl-lib-tdefs))
eieio-fdefs eieio-tdefs)
t)))
(cl-defs-re (eval-when-compile
(regexp-opt (append lisp-fdefs lisp-vdefs
cl-lib-fdefs cl-lib-tdefs
eieio-fdefs eieio-tdefs
cl-fdefs cl-vdefs cl-tdefs)
t)))
;; Common Lisp keywords (Elisp keywords are handled dynamically).
(cl-kws-re (eval-when-compile
(regexp-opt (append lisp-kw cl-kw) t)))
;; Elisp and Common Lisp "errors".
(el-errs-re (eval-when-compile
(regexp-opt (append (mapcar (lambda (s) (concat "cl-" s))
cl-lib-errs)
lisp-errs el-errs)
t)))
(cl-errs-re (eval-when-compile
(regexp-opt (append lisp-errs cl-lib-errs cl-errs) t))))
(dolist (v vdefs)
(put (intern v) 'lisp-define-type 'var))
(dolist (v tdefs)
(put (intern v) 'lisp-define-type 'type))
(define-obsolete-variable-alias 'lisp-font-lock-keywords-1
'lisp-el-font-lock-keywords-1 "24.4")
(defconst lisp-el-font-lock-keywords-1
`( ;; Definitions.
(,(concat "(" el-defs-re "\\_>"
;; Any whitespace and defined object.
"[ \t']*"
"\\(([ \t']*\\)?" ;; An opening paren.
"\\(\\(setf\\)[ \t]+" (rx lisp-mode-symbol)
"\\|" (rx lisp-mode-symbol) "\\)?")
(1 font-lock-keyword-face)
(3 (let ((type (get (intern-soft (match-string 1)) 'lisp-define-type)))
(cond ((eq type 'var) font-lock-variable-name-face)
((eq type 'type) font-lock-type-face)
;; If match-string 2 is non-nil, we encountered a
;; form like (defalias (intern (concat s "-p"))),
;; unless match-string 4 is also there. Then its a
;; defmethod with (setf foo) as name.
((or (not (match-string 2)) ;; Normal defun.
(and (match-string 2) ;; Setf method.
(match-string 4)))
font-lock-function-name-face)))
nil t))
;; Emacs Lisp autoload cookies. Supports the slightly different
;; forms used by mh-e, calendar, etc.
(,lisp-mode-autoload-regexp (3 font-lock-warning-face prepend)
(2 font-lock-function-name-face prepend t)))
"Subdued level highlighting for Emacs Lisp mode.")
(defconst lisp-cl-font-lock-keywords-1
`( ;; Definitions.
(,(concat "(" cl-defs-re "\\_>"
;; Any whitespace and defined object.
"[ \t']*"
"\\(([ \t']*\\)?" ;; An opening paren.
"\\(\\(setf\\)[ \t]+" (rx lisp-mode-symbol)
"\\|" (rx lisp-mode-symbol) "\\)?")
(1 font-lock-keyword-face)
(3 (let ((type (get (intern-soft (match-string 1)) 'lisp-define-type)))
(cond ((eq type 'var) font-lock-variable-name-face)
((eq type 'type) font-lock-type-face)
((or (not (match-string 2)) ;; Normal defun.
(and (match-string 2) ;; Setf function.
(match-string 4)))
font-lock-function-name-face)))
nil t)))
"Subdued level highlighting for Lisp modes.")
(define-obsolete-variable-alias 'lisp-font-lock-keywords-2
'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 "\\_>")
(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']*\\(" (rx lisp-mode-symbol) "\\)?")
(1 font-lock-keyword-face)
(2 font-lock-constant-face nil t))
;; Words inside \\[], \\<>, \\{} or \\`' tend to be for
;; `substitute-command-keys'.
(,(rx "\\\\" (or (seq "[" (group-n 1 lisp-mode-symbol) "]")
(seq "`" (group-n 1
;; allow multiple words, e.g. "C-x a"
lisp-mode-symbol (* " " lisp-mode-symbol))
"'")))
(1 font-lock-constant-face prepend))
(,(rx "\\\\" (or (seq "<" (group-n 1 lisp-mode-symbol) ">")
(seq "{" (group-n 1 lisp-mode-symbol) "}")))
(1 font-lock-variable-name-face prepend))
;; Ineffective backslashes (typically in need of doubling).
("\\(\\\\\\)\\([^\"\\]\\)"
(1 (elisp--font-lock-backslash) prepend))
;; Words inside ‘’, '' and `' tend to be symbol names.
(,(concat "[`‘']\\(" (rx lisp-mode-symbol) "\\)['’]")
(1 font-lock-constant-face prepend))
;; \\= tends to be an escape in doc strings.
(,(rx "\\\\=")
(0 font-lock-builtin-face prepend))
;; Constant values.
(,(lambda (bound) (lisp-mode--search-key ":" bound))
(0 font-lock-builtin-face))
;; ELisp and CLisp `&' keywords as types.
(,(lambda (bound) (lisp-mode--search-key "&" bound))
(0 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 "Easy to misread; consider moving the element to the next line")
prepend))
(lisp--match-confusable-symbol-character
0 '(face font-lock-warning-face
help-echo "Confusable character"))
))
"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']*\\(" (rx lisp-mode-symbol) "\\)?")
(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 "[`‘]\\(" (rx lisp-mode-symbol) "\\)['’]")
(1 font-lock-constant-face prepend))
;; Uninterned symbols, e.g., (defpackage #:my-package ...)
;; must come before keywords below to have effect
(,(concat "#:" (rx lisp-mode-symbol) "") 0 font-lock-builtin-face)
;; Constant values.
(,(lambda (bound) (lisp-mode--search-key ":" bound))
(0 font-lock-builtin-face))
;; ELisp and CLisp `&' keywords as types.
(,(lambda (bound) (lisp-mode--search-key "&" bound))
(0 font-lock-type-face))
;; ELisp regexp grouping constructs
;; 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 https://www.cliki.net/Naming+conventions:
;; CL (but not EL!) `with-' (context) and `do-' (iteration)
(,(concat "(\\(\\(do-\\|with-\\)" (rx lisp-mode-symbol) "\\)")
(1 font-lock-keyword-face))
(lisp--match-hidden-arg
(0 '(face font-lock-warning-face
help-echo "Easy to misread; consider moving the element to the next line")
prepend))
))
"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 mode 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 non-nil 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
(concat "([ \t\n]*\\("
(rx lisp-mode-symbol) "\\)"))
(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 non-nil if `:documentation' symbol ends at STARTPOS inside a list.
`:doc' can also be used.
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\\_>\\|:doc\\_>"))))))
(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-*$") ""))
;; Maybe this should be discouraged/obsoleted and users should be
;; encouraged to use 'lisp-data-mode' instead.
(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
;;(setq-local 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 (concat ";;;;* [^ \t\n]\\|(\\|\\("
lisp-mode-autoload-regexp
"\\)"))
(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))
;;;###autoload
(define-derived-mode lisp-data-mode prog-mode "Lisp-Data"
"Major mode for buffers holding data written in Lisp syntax."
:group 'lisp
(lisp-mode-variables nil t nil)
(setq-local electric-quote-string t)
(setq imenu-case-fold-search nil))
(defun lisp-outline-level ()
"Lisp mode `outline-level' function."
;; Expects outline-regexp is ";;;\\(;* [^ \t\n]\\|###autoload\\)\\|("
;; and point is at the beginning of a matching line.
(let ((len (- (match-end 0) (match-beginning 0))))
(cond ((or (looking-at-p "(")
(looking-at-p lisp-mode-autoload-regexp))
1000)
((looking-at ";;\\(;+\\) ")
(- (match-end 1) (match-beginning 1)))
;; Above should match everything but just in case.
(t
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-keymap lisp-mode-shared-map
:doc "Keymap for commands shared by all sorts of Lisp modes."
:parent prog-mode-map
"C-M-q" #'indent-sexp
"DEL" #'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!!
;;;"<backspace>" #'backward-delete-char-untabify
)
(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-keymap lisp-mode-map
:doc "Keymap for ordinary Lisp mode.
All commands in `lisp-mode-shared-map' are inherited by this map."
:parent lisp-mode-shared-map
"C-M-x" #'lisp-eval-defun
"C-c C-z" #'run-lisp)
(easy-menu-define lisp-mode-menu lisp-mode-map
"Menu for ordinary Lisp mode."
'("Lisp"
["Indent sexp" indent-sexp
:help "Indent each line of the list starting just after point"]
["Eval defun" lisp-eval-defun
:help "Send the current defun to the Lisp process made by M-x run-lisp"]
["Run inferior Lisp" run-lisp
:help "Run an inferior Lisp process, input and output via buffer `*inferior-lisp*'"]))
(define-derived-mode lisp-mode lisp-data-mode "Lisp"
"Major mode for editing programs in Common Lisp and other similar Lisps.
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."
(setq-local lisp-indent-function 'common-lisp-indent-function)
(setq-local find-tag-default-function 'lisp-find-tag-default)
(setq-local comment-start-skip
"\\(\\(^\\|[^\\\n]\\)\\(\\\\\\\\\\)*\\)\\(;+\\|#|\\) *")
(setq-local comment-end-skip "[ \t]*\\(\\s>\\||#\\)")
(setq-local font-lock-comment-end-skip "|#")
(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)))
(defcustom lisp-indent-offset nil
"If non-nil, indent second line of expressions that many more columns."
:group 'lisp
:type '(choice (const nil) integer)
:safe (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.
(and (not (eobp)) (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)
;; Can't move to the next line, apparently end of buffer.
nil)
((null indent-stack)
;; Negative depth, probably some kind of syntax
;; error. Reset the 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, but the
;; loop should always skip over strings (unless we hit
;; end of buffer, which is taken care of by the first
;; clause).
(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))))))