;;; elisp-mode.el --- Emacs Lisp mode -*- lexical-binding:t -*-
-;; Copyright (C) 1985-1986, 1999-2015 Free Software Foundation, Inc.
+;; Copyright (C) 1985-1986, 1999-2016 Free Software Foundation, Inc.
;; Maintainer: emacs-devel@gnu.org
;; Keywords: lisp, languages
;;; Code:
+(require 'cl-generic)
(require 'lisp-mode)
(eval-when-compile (require 'cl-lib))
\\{emacs-lisp-mode-map}"
:group 'lisp
- (defvar xref-find-function)
- (defvar xref-identifier-completion-table-function)
+ (defvar project-vc-external-roots-function)
(lisp-mode-variables nil nil 'elisp)
(add-hook 'after-load-functions #'elisp--font-lock-flush-elisp-buffers)
(setq-local electric-pair-text-pairs
(append '((?\` . ?\') (?‘ . ?’)) electric-pair-text-pairs))
(setq-local electric-quote-string t)
(setq imenu-case-fold-search nil)
- (add-function :before-until (local 'eldoc-documentation-function)
- #'elisp-eldoc-documentation-function)
- (setq-local xref-find-function #'elisp-xref-find)
- (setq-local xref-identifier-completion-table-function
- #'elisp--xref-identifier-completion-table)
+ (add-hook 'eldoc-documentation-functions
+ #'elisp-eldoc-documentation-function nil t)
+ (add-hook 'xref-backend-functions #'elisp--xref-backend nil t)
+ (setq-local project-vc-external-roots-function #'elisp-load-path-roots)
(add-hook 'completion-at-point-functions
#'elisp-completion-at-point nil 'local))
;; Font-locking support.
(defun elisp--font-lock-flush-elisp-buffers (&optional file)
- ;; FIXME: Aren't we only ever called from after-load-functions?
- ;; Don't flush during load unless called from after-load-functions.
- ;; In that case, FILE is non-nil. It's somehow strange that
- ;; load-in-progress is t when an after-load-function is called since
- ;; that should run *after* the load...
+ ;; We're only ever called from after-load-functions, load-in-progress can
+ ;; still be t in case of nested loads.
(when (or (not load-in-progress) file)
;; FIXME: If the loaded file did not define any macros, there shouldn't
;; be any need to font-lock-flush all the Elisp buffers.
(string-match ".*$" doc)
(match-string 0 doc))))
+;; can't (require 'find-func) in a preloaded file
(declare-function find-library-name "find-func" (library))
(declare-function find-function-library "find-func" (function &optional l-o v))
" " (cadr table-etc)))
(cddr table-etc)))))))))
-(define-obsolete-function-alias
- 'lisp-completion-at-point 'elisp-completion-at-point "25.1")
+(defun lisp-completion-at-point (&optional _predicate)
+ (declare (obsolete elisp-completion-at-point "25.1"))
+ (elisp-completion-at-point))
;;; Xref backend
(declare-function xref-make-bogus-location "xref" (message))
-(declare-function xref-make "xref" (description location))
-(declare-function xref-collect-matches "xref" (input dir &optional kind))
+(declare-function xref-make "xref" (summary location))
(declare-function xref-collect-references "xref" (symbol dir))
-(defun elisp-xref-find (action id)
- (require 'find-func)
- (pcase action
- (`definitions
- (let ((sym (intern-soft id)))
- (when sym
- (elisp--xref-find-definitions sym))))
- (`references
- (elisp--xref-find-matches id #'xref-collect-references))
- (`matches
- (elisp--xref-find-matches id #'xref-collect-matches))
- (`apropos
- (elisp--xref-find-apropos id))))
-
-(defun elisp--xref-identifier-location (type sym)
- (let ((file
- (pcase type
- (`defun (when (fboundp sym)
- (let ((fun-lib
- (find-function-library sym)))
- (setq sym (car fun-lib))
- (cdr fun-lib))))
- (`defvar (and (boundp sym)
- (let ((el-file (symbol-file sym 'defvar)))
- (if el-file
- (and
- ;; Don't show minor modes twice.
- ;; TODO: If TYPE ever becomes dependent on the
- ;; context, move this check outside.
- (not (and (fboundp sym)
- (memq sym minor-mode-list)))
- el-file)
- (help-C-file-name sym 'var)))))
- (`feature (and (featurep sym)
- ;; Skip when a function with the same name
- ;; is defined, because it's probably in the
- ;; same file.
- (not (fboundp sym))
- (ignore-errors
- (find-library-name (symbol-name sym)))))
- (`defface (when (facep sym)
- (symbol-file sym 'defface))))))
- (when file
- (when (string-match-p "\\.elc\\'" file)
- (setq file (substring file 0 -1)))
- (xref-make-elisp-location sym type file))))
+(defun elisp--xref-backend () 'elisp)
+;; WORKAROUND: This is nominally a constant, but the text properties
+;; are not preserved thru dump if use defconst. See bug#21237.
(defvar elisp--xref-format
(let ((str "(%s %s)"))
(put-text-property 1 3 'face 'font-lock-keyword-face str)
(put-text-property 4 6 'face 'font-lock-function-name-face str)
str))
+;; WORKAROUND: This is nominally a constant, but the text properties
+;; are not preserved thru dump if use defconst. See bug#21237.
+(defvar elisp--xref-format-extra
+ (let ((str "(%s %s %s)"))
+ (put-text-property 1 3 'face 'font-lock-keyword-face str)
+ (put-text-property 4 6 'face 'font-lock-function-name-face str)
+ str))
+
+(defvar find-feature-regexp);; in find-func.el
+
+(defun elisp--xref-make-xref (type symbol file &optional summary)
+ "Return an xref for TYPE SYMBOL in FILE.
+TYPE must be a type in `find-function-regexp-alist' (use nil for
+'defun). If SUMMARY is non-nil, use it for the summary;
+otherwise build the summary from TYPE and SYMBOL."
+ (xref-make (or summary
+ (format elisp--xref-format (or type 'defun) symbol))
+ (xref-make-elisp-location symbol type file)))
+
+(defvar elisp-xref-find-def-functions nil
+ "List of functions to be run from `elisp--xref-find-definitions' to add additional xrefs.
+Called with one arg; the symbol whose definition is desired.
+Each function should return a list of xrefs, or nil; the first
+non-nil result supercedes the xrefs produced by
+`elisp--xref-find-definitions'.")
+
+(cl-defmethod xref-backend-definitions ((_backend (eql elisp)) identifier)
+ (require 'find-func)
+ ;; FIXME: use information in source near point to filter results:
+ ;; (dvc-log-edit ...) - exclude 'feature
+ ;; (require 'dvc-log-edit) - only 'feature
+ ;; Semantic may provide additional information
+ ;;
+ (let ((sym (intern-soft identifier)))
+ (when sym
+ (elisp--xref-find-definitions sym))))
+
(defun elisp--xref-find-definitions (symbol)
- (save-excursion
- (let (lst)
- (dolist (type '(feature defface defvar defun))
- (let ((loc
- (condition-case err
- (elisp--xref-identifier-location type symbol)
- (error
- (xref-make-bogus-location (error-message-string err))))))
- (when loc
- (push
- (xref-make (format elisp--xref-format type symbol)
- loc)
- lst))))
- lst)))
-
-(defvar package-user-dir)
-
-(defun elisp--xref-find-matches (symbol fun)
- (let* ((dirs (sort
- (mapcar
- (lambda (dir)
- (file-name-as-directory (expand-file-name dir)))
- ;; It's one level above a number of `load-path'
- ;; elements (one for each installed package).
- ;; Save us some process calls.
- (cons package-user-dir load-path))
- #'string<))
- (ref dirs))
- ;; Delete subdirectories from the list.
- (while (cdr ref)
- (if (string-prefix-p (car ref) (cadr ref))
- (setcdr ref (cddr ref))
- (setq ref (cdr ref))))
- (cl-mapcan
- (lambda (dir)
- (and (file-exists-p dir)
- (funcall fun symbol dir)))
- dirs)))
-
-(defun elisp--xref-find-apropos (regexp)
+ ;; The file name is not known when `symbol' is defined via interactive eval.
+ (let (xrefs)
+
+ (let ((temp elisp-xref-find-def-functions))
+ (while (and (null xrefs)
+ temp)
+ (setq xrefs (append xrefs (funcall (pop temp) symbol)))))
+
+ (unless xrefs
+ ;; alphabetical by result type symbol
+
+ ;; FIXME: advised function; list of advice functions
+ ;; FIXME: aliased variable
+
+ ;; Coding system symbols do not appear in ‘load-history’,
+ ;; so we can’t get a location for them.
+
+ (when (and (symbolp symbol)
+ (symbol-function symbol)
+ (symbolp (symbol-function symbol)))
+ ;; aliased function
+ (let* ((alias-symbol symbol)
+ (alias-file (symbol-file alias-symbol))
+ (real-symbol (symbol-function symbol))
+ (real-file (find-lisp-object-file-name real-symbol 'defun)))
+
+ (when real-file
+ (push (elisp--xref-make-xref nil real-symbol real-file) xrefs))
+
+ (when alias-file
+ (push (elisp--xref-make-xref 'defalias alias-symbol alias-file) xrefs))))
+
+ (when (facep symbol)
+ (let ((file (find-lisp-object-file-name symbol 'defface)))
+ (when file
+ (push (elisp--xref-make-xref 'defface symbol file) xrefs))))
+
+ (when (fboundp symbol)
+ (let ((file (find-lisp-object-file-name symbol (symbol-function symbol)))
+ generic doc)
+ (when file
+ (cond
+ ((eq file 'C-source)
+ ;; First call to find-lisp-object-file-name for an object
+ ;; defined in C; the doc strings from the C source have
+ ;; not been loaded yet. Second call will return "src/*.c"
+ ;; in file; handled by 't' case below.
+ (push (elisp--xref-make-xref nil symbol (help-C-file-name (symbol-function symbol) 'subr)) xrefs))
+
+ ((and (setq doc (documentation symbol t))
+ ;; This doc string is defined in cl-macs.el cl-defstruct
+ (string-match "Constructor for objects of type `\\(.*\\)'" doc))
+ ;; `symbol' is a name for the default constructor created by
+ ;; cl-defstruct, so return the location of the cl-defstruct.
+ (let* ((type-name (match-string 1 doc))
+ (type-symbol (intern type-name))
+ (file (find-lisp-object-file-name type-symbol 'define-type))
+ (summary (format elisp--xref-format-extra
+ 'cl-defstruct
+ (concat "(" type-name)
+ (concat "(:constructor " (symbol-name symbol) "))"))))
+ (push (elisp--xref-make-xref 'define-type type-symbol file summary) xrefs)
+ ))
+
+ ((setq generic (cl--generic symbol))
+ ;; FIXME: move this to elisp-xref-find-def-functions, in cl-generic.el
+
+ ;; A generic function. If there is a default method, it
+ ;; will appear in the method table, with no
+ ;; specializers.
+ ;;
+ ;; If the default method is declared by the cl-defgeneric
+ ;; declaration, it will have the same location as the
+ ;; cl-defgeneric, so we want to exclude it from the
+ ;; result. In this case, it will have a null doc
+ ;; string. User declarations of default methods may also
+ ;; have null doc strings, but we hope that is
+ ;; rare. Perhaps this heuristic will discourage that.
+ (dolist (method (cl--generic-method-table generic))
+ (let* ((info (cl--generic-method-info method));; qual-string combined-args doconly
+ (specializers (cl--generic-method-specializers method))
+ (non-default nil)
+ (met-name (cons symbol specializers))
+ (file (find-lisp-object-file-name met-name 'cl-defmethod)))
+ (dolist (item specializers)
+ ;; default method has all 't' in specializers
+ (setq non-default (or non-default (not (equal t item)))))
+
+ (when (and file
+ (or non-default
+ (nth 2 info))) ;; assuming only co-located default has null doc string
+ (if specializers
+ (let ((summary (format elisp--xref-format-extra 'cl-defmethod symbol (nth 1 info))))
+ (push (elisp--xref-make-xref 'cl-defmethod met-name file summary) xrefs))
+
+ (let ((summary (format elisp--xref-format-extra 'cl-defmethod symbol "()")))
+ (push (elisp--xref-make-xref 'cl-defmethod met-name file summary) xrefs))))
+ ))
+
+ (if (and (setq doc (documentation symbol t))
+ ;; This doc string is created somewhere in
+ ;; cl--generic-make-function for an implicit
+ ;; defgeneric.
+ (string-match "\n\n(fn ARG &rest ARGS)" doc))
+ ;; This symbol is an implicitly defined defgeneric, so
+ ;; don't return it.
+ nil
+ (push (elisp--xref-make-xref 'cl-defgeneric symbol file) xrefs))
+ )
+
+ (t
+ (push (elisp--xref-make-xref nil symbol file) xrefs))
+ ))))
+
+ (when (boundp symbol)
+ ;; A variable
+ (let ((file (find-lisp-object-file-name symbol 'defvar)))
+ (when file
+ (cond
+ ((eq file 'C-source)
+ ;; The doc strings from the C source have not been loaded
+ ;; yet; help-C-file-name does that. Second call will
+ ;; return "src/*.c" in file; handled below.
+ (push (elisp--xref-make-xref 'defvar symbol (help-C-file-name symbol 'var)) xrefs))
+
+ ((string= "src/" (substring file 0 4))
+ ;; The variable is defined in a C source file; don't check
+ ;; for define-minor-mode.
+ (push (elisp--xref-make-xref 'defvar symbol file) xrefs))
+
+ ((memq symbol minor-mode-list)
+ ;; The symbol is a minor mode. These should be defined by
+ ;; "define-minor-mode", which means the variable and the
+ ;; function are declared in the same place. So we return only
+ ;; the function, arbitrarily.
+ ;;
+ ;; There is an exception, when the variable is defined in C
+ ;; code, as for abbrev-mode.
+ ;;
+ ;; IMPROVEME: If the user is searching for the identifier at
+ ;; point, we can determine whether it is a variable or
+ ;; function by looking at the source code near point.
+ ;;
+ ;; IMPROVEME: The user may actually be asking "do any
+ ;; variables by this name exist"; we need a way to specify
+ ;; that.
+ nil)
+
+ (t
+ (push (elisp--xref-make-xref 'defvar symbol file) xrefs))
+
+ ))))
+
+ (when (featurep symbol)
+ (let ((file (ignore-errors
+ (find-library-name (symbol-name symbol)))))
+ (when file
+ (push (elisp--xref-make-xref 'feature symbol file) xrefs))))
+ );; 'unless xrefs'
+
+ xrefs))
+
+(declare-function project-external-roots "project")
+
+(cl-defmethod xref-backend-apropos ((_backend (eql elisp)) regexp)
(apply #'nconc
(let (lst)
(dolist (sym (apropos-internal regexp))
(facep sym)))
'strict))
-(defun elisp--xref-identifier-completion-table ()
+(cl-defmethod xref-backend-identifier-completion-table ((_backend (eql elisp)))
elisp--xref-identifier-completion-table)
(cl-defstruct (xref-elisp-location
(cl-defmethod xref-location-marker ((l xref-elisp-location))
(pcase-let (((cl-struct xref-elisp-location symbol type file) l))
- (let ((buffer-point
- (pcase type
- (`defun (find-function-search-for-symbol symbol nil file))
- ((or `defvar `defface)
- (find-function-search-for-symbol symbol type file))
- (`feature
- (cons (find-file-noselect file) 1)))))
+ (let ((buffer-point (find-function-search-for-symbol symbol type file)))
(with-current-buffer (car buffer-point)
- (goto-char (or (cdr buffer-point) (point-min)))
- (point-marker)))))
+ (save-excursion
+ (goto-char (or (cdr buffer-point) (point-min)))
+ (point-marker))))))
+
+(cl-defmethod xref-location-group ((l xref-elisp-location))
+ (xref-elisp-location-file l))
+
+(defun elisp-load-path-roots ()
+ (if (boundp 'package-user-dir)
+ (cons package-user-dir load-path)
+ load-path))
;;; Elisp Interaction mode
(goto-char end)))))))
(defun elisp-byte-code-syntax-propertize (start end)
+ (goto-char start)
(elisp--byte-code-comment end (point))
(funcall
(syntax-propertize-rules
((or (eq (following-char) ?\')
(eq (preceding-char) ?\'))
(setq left-quote ?\`)))
+
+ ;; When after a named character literal, skip over the entire
+ ;; literal, not only its last word.
+ (when (= (preceding-char) ?})
+ (let ((begin (save-excursion
+ (backward-char)
+ (skip-syntax-backward "w-")
+ (backward-char 3)
+ (when (looking-at-p "\\\\N{") (point)))))
+ (when begin (goto-char begin))))
+
(forward-sexp -1)
;; If we were after `?\e' (or similar case),
;; use the whole thing, not just the `e'.
(eval (eval-sexp-add-defvars (elisp--preceding-sexp)) lexical-binding)
eval-last-sexp-arg-internal)))
-
(defun elisp--eval-last-sexp-print-value (value &optional eval-last-sexp-arg-internal)
(let ((unabbreviated (let ((print-length nil) (print-level nil))
(prin1-to-string value)))
then reset the variable using the initial value expression
even if the variable already has some other value.
\(Normally `defvar' does not change the variable's value
-if it already has a value.\)
+if it already has a value.)
Return the result of evaluation."
;; FIXME: the print-length/level bindings should only be applied while
0 - contains the last symbol read from the buffer.
1 - contains the string last displayed in the echo area for variables,
or argument string for functions.
- 2 - 'function if function args, 'variable if variable documentation.")
+ 2 - `function' if function args, `variable' if variable documentation.")
(defun elisp-eldoc-documentation-function ()
"`eldoc-documentation-function' (which see) for Emacs Lisp."
ARGLIST is either a string, or a list of strings or symbols."
(let ((str (cond ((stringp arglist) arglist)
((not (listp arglist)) nil)
- (t (format "%S" (help-make-usage 'toto arglist))))))
+ (t (substitute-command-keys
+ (help--make-usage-docstring 'toto arglist))))))
(if (and str (string-match "\\`([^ )]+ ?" str))
(replace-match "(" t t str)
str)))