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Diffstat (limited to 'lisp/emacs-lisp/pp.el')
| -rw-r--r-- | lisp/emacs-lisp/pp.el | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/lisp/emacs-lisp/pp.el b/lisp/emacs-lisp/pp.el deleted file mode 100644 index 013ce8402d3..00000000000 --- a/lisp/emacs-lisp/pp.el +++ /dev/null @@ -1,181 +0,0 @@ -;;; pp.el --- pretty printer for Emacs Lisp - -;; Copyright (C) 1989, 1993 Free Software Foundation, Inc. - -;; Author: Randal Schwartz <merlyn@stonehenge.com> - -;; 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 2, 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; see the file COPYING. If not, write to the -;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, -;; Boston, MA 02111-1307, USA. - -;;; Code: - -(defvar pp-escape-newlines t - "*Value of print-escape-newlines used by pp-* functions.") - -(defun pp-to-string (object) - "Return a string containing the pretty-printed representation of OBJECT, -any Lisp object. Quoting characters are used when needed to make output -that `read' can handle, whenever this is possible." - (save-excursion - (set-buffer (generate-new-buffer " pp-to-string")) - (unwind-protect - (progn - (lisp-mode-variables t) - (let ((print-escape-newlines pp-escape-newlines)) - (prin1 object (current-buffer))) - (goto-char (point-min)) - (while (not (eobp)) - ;; (message "%06d" (- (point-max) (point))) - (cond - ((looking-at "\\s(\\|#\\s(") - (while (looking-at "\\s(\\|#\\s(") - (forward-char 1))) - ((and (looking-at "\\(quote[ \t]+\\)\\([^.)]\\)") - (> (match-beginning 1) 1) - (= ?\( (char-after (1- (match-beginning 1)))) - ;; Make sure this is a two-element list. - (save-excursion - (goto-char (match-beginning 2)) - (forward-sexp) - ;; (looking-at "[ \t]*\)") - ;; Avoid mucking with match-data; does this test work? - (char-equal ?\) (char-after (point))))) - ;; -1 gets the paren preceding the quote as well. - (delete-region (1- (match-beginning 1)) (match-end 1)) - (insert "'") - (forward-sexp 1) - (if (looking-at "[ \t]*\)") - (delete-region (match-beginning 0) (match-end 0)) - (error "Malformed quote")) - (backward-sexp 1)) - ((condition-case err-var - (prog1 t (down-list 1)) - (error nil)) - (backward-char 1) - (skip-chars-backward " \t") - (delete-region - (point) - (progn (skip-chars-forward " \t") (point))) - (if (not (char-equal ?' (char-after (1- (point))))) - (insert ?\n))) - ((condition-case err-var - (prog1 t (up-list 1)) - (error nil)) - (while (looking-at "\\s)") - (forward-char 1)) - (skip-chars-backward " \t") - (delete-region - (point) - (progn (skip-chars-forward " \t") (point))) - (if (not (char-equal ?' (char-after (1- (point))))) - (insert ?\n))) - (t (goto-char (point-max))))) - (goto-char (point-min)) - (indent-sexp) - (buffer-string)) - (kill-buffer (current-buffer))))) - -;;;###autoload -(defun pp (object &optional stream) - "Output the pretty-printed representation of OBJECT, any Lisp object. -Quoting characters are printed when needed to make output that `read' -can handle, whenever this is possible. -Output stream is STREAM, or value of `standard-output' (which see)." - (princ (pp-to-string object) (or stream standard-output))) - -;;;###autoload -(defun pp-eval-expression (expression) - "Evaluate EXPRESSION and pretty-print value into a new display buffer. -If the pretty-printed value fits on one line, the message line is used -instead. Value is also consed on to front of variable values 's -value." - (interactive "xPp-eval: ") - (setq values (cons (eval expression) values)) - (let* ((old-show-function temp-buffer-show-function) - ;; Use this function to display the buffer. - ;; This function either decides not to display it at all - ;; or displays it in the usual way. - (temp-buffer-show-function - (function - (lambda (buf) - (save-excursion - (set-buffer buf) - (goto-char (point-min)) - (end-of-line 1) - (if (or (< (1+ (point)) (point-max)) - (>= (- (point) (point-min)) (frame-width))) - (let ((temp-buffer-show-function old-show-function) - (old-selected (selected-window)) - (window (display-buffer buf))) - (goto-char (point-min)) ; expected by some hooks ... - (make-frame-visible (window-frame window)) - (unwind-protect - (progn - (select-window window) - (run-hooks 'temp-buffer-show-hook)) - (select-window old-selected))) - (message "%s" (buffer-substring (point-min) (point))) - )))))) - (with-output-to-temp-buffer "*Pp Eval Output*" - (pp (car values))) - (save-excursion - (set-buffer "*Pp Eval Output*") - (emacs-lisp-mode) - (make-local-variable 'font-lock-verbose) - (setq font-lock-verbose nil)))) - -;;;###autoload -(defun pp-eval-last-sexp (arg) - "Run `pp-eval-expression' on sexp before point (which see). -With argument, pretty-print output into current buffer. -Ignores leading comment characters." - (interactive "P") - (let ((stab (syntax-table)) (pt (point)) start exp) - (set-syntax-table emacs-lisp-mode-syntax-table) - (save-excursion - (forward-sexp -1) - ;; If first line is commented, ignore all leading comments: - (if (save-excursion (beginning-of-line) (looking-at "[ \t]*;")) - (progn - (setq exp (buffer-substring (point) pt)) - (while (string-match "\n[ \t]*;+" exp start) - (setq start (1+ (match-beginning 0)) - exp (concat (substring exp 0 start) - (substring exp (match-end 0))))) - (setq exp (read exp))) - (setq exp (read (current-buffer))))) - (set-syntax-table stab) - (if arg - (insert (pp-to-string (eval exp))) - (pp-eval-expression exp)))) - -;;; Test cases for quote -;; (pp-eval-expression ''(quote quote)) -;; (pp-eval-expression ''((quote a) (quote b))) -;; (pp-eval-expression ''('a 'b)) ; same as above -;; (pp-eval-expression ''((quote (quote quote)) (quote quote))) -;; These do not satisfy the quote test. -;; (pp-eval-expression ''quote) -;; (pp-eval-expression ''(quote)) -;; (pp-eval-expression ''(quote . quote)) -;; (pp-eval-expression ''(quote a b)) -;; (pp-eval-expression ''(quotefoo)) -;; (pp-eval-expression ''(a b)) - -(provide 'pp) ; so (require 'pp) works - -;;; pp.el ends here. |