diff options
Diffstat (limited to 'lisp/emacs-lisp/find-func.el')
| -rw-r--r-- | lisp/emacs-lisp/find-func.el | 65 |
1 files changed, 33 insertions, 32 deletions
diff --git a/lisp/emacs-lisp/find-func.el b/lisp/emacs-lisp/find-func.el index 0194af2e3a8..d64281d0e81 100644 --- a/lisp/emacs-lisp/find-func.el +++ b/lisp/emacs-lisp/find-func.el @@ -1,6 +1,6 @@ ;;; find-func.el --- find the definition of the Emacs Lisp function near point -;; Copyright (C) 1997, 1999, 2001-2011 Free Software Foundation, Inc. +;; Copyright (C) 1997, 1999, 2001-2012 Free Software Foundation, Inc. ;; Author: Jens Petersen <petersen@kurims.kyoto-u.ac.jp> ;; Maintainer: petersen@kurims.kyoto-u.ac.jp @@ -198,13 +198,14 @@ If FUNC is not the symbol of an advised function, just returns FUNC." (defun find-function-C-source (fun-or-var file type) "Find the source location where FUN-OR-VAR is defined in FILE. TYPE should be nil to find a function, or `defvar' to find a variable." - (unless find-function-C-source-directory - (setq find-function-C-source-directory - (read-directory-name "Emacs C source dir: " nil nil t))) - (setq file (expand-file-name file find-function-C-source-directory)) - (unless (file-readable-p file) - (error "The C source file %s is not available" - (file-name-nondirectory file))) + (let ((dir (or find-function-C-source-directory + (read-directory-name "Emacs C source dir: " nil nil t)))) + (setq file (expand-file-name file dir)) + (if (file-readable-p file) + (if (null find-function-C-source-directory) + (setq find-function-C-source-directory dir)) + (error "The C source file %s is not available" + (file-name-nondirectory file)))) (unless type ;; Either or both an alias and its target might be advised. (setq fun-or-var (find-function-advised-original @@ -312,7 +313,7 @@ The search is done in the source for library LIBRARY." (cons (current-buffer) nil)))))))) ;;;###autoload -(defun find-function-noselect (function) +(defun find-function-noselect (function &optional lisp-only) "Return a pair (BUFFER . POINT) pointing to the definition of FUNCTION. Finds the source file containing the definition of FUNCTION @@ -320,6 +321,10 @@ in a buffer and the point of the definition. The buffer is not selected. If the function definition can't be found in the buffer, returns (BUFFER). +If FUNCTION is a built-in function, this function normally +attempts to find it in the Emacs C sources; however, if LISP-ONLY +is non-nil, signal an error instead. + If the file where FUNCTION is defined is not known, then it is searched for in `find-function-source-path' if non-nil, otherwise in `load-path'." @@ -345,6 +350,8 @@ in `load-path'." (cond ((eq (car-safe def) 'autoload) (nth 1 def)) ((subrp def) + (if lisp-only + (error "%s is a built-in function" function)) (help-C-file-name def 'subr)) ((symbol-file function 'defun))))) (find-function-search-for-symbol function nil library)))) @@ -356,29 +363,23 @@ If TYPE is nil, insist on a symbol with a function definition. Otherwise TYPE should be `defvar' or `defface'. If TYPE is nil, defaults using `function-called-at-point', otherwise uses `variable-at-point'." - (let ((symb (if (null type) - (function-called-at-point) - (if (eq type 'defvar) - (variable-at-point) - (variable-at-point t)))) - (predicate (cdr (assq type '((nil . fboundp) (defvar . boundp) - (defface . facep))))) - (prompt (cdr (assq type '((nil . "function") (defvar . "variable") - (defface . "face"))))) - (enable-recursive-minibuffers t) - val) - (if (equal symb 0) - (setq symb nil)) - (setq val (completing-read - (concat "Find " - prompt - (if symb - (format " (default %s)" symb)) - ": ") - obarray predicate t nil)) - (list (if (equal val "") - symb - (intern val))))) + (let* ((symb1 (cond ((null type) (function-called-at-point)) + ((eq type 'defvar) (variable-at-point)) + (t (variable-at-point t)))) + (symb (unless (eq symb1 0) symb1)) + (predicate (cdr (assq type '((nil . fboundp) + (defvar . boundp) + (defface . facep))))) + (prompt-type (cdr (assq type '((nil . "function") + (defvar . "variable") + (defface . "face"))))) + (prompt (concat "Find " prompt-type + (and symb (format " (default %s)" symb)) + ": ")) + (enable-recursive-minibuffers t)) + (list (intern (completing-read + prompt obarray predicate + t nil nil (and symb (symbol-name symb))))))) (defun find-function-do-it (symbol type switch-fn) "Find Emacs Lisp SYMBOL in a buffer and display it. |