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- ;;; symbol-syntax.el --- find chars with symbol syntax
-
- ;; Copyright (C) 1992, 1993 Free Software Foundation, Inc.
- ;; Copyright (C) 1995 Sun Microsystems.
-
- ;; Created by: JBW, JBW@_CORTEZ
- ;; Created on: Wed Jun 20 15:15:34 1990
- ;; Last modified by: Ben Wing, wing@666.com
- ;; Last modified on: Mon Oct 2 02:32:05 GMT 1995
- ;; Filename: symbol-syntax.el
- ;; Keywords: matching
-
- ;; This file is part of XEmacs.
-
- ;; XEmacs 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.
-
- ;; XEmacs 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 XEmacs; see the file COPYING. If not, write to the
- ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Synched up with: Not in FSF.
-
- (defvar symbol-syntax-table-alist nil)
- ;; '((c-mode-syntax-table)
- ;; (emacs-lisp-mode-syntax-table)
- ;; (lisp-mode-syntax-table)
- ;; (text-mode-syntax-table)))
-
- (defun update-symbol-syntax-table-alist ()
- (let ((alist symbol-syntax-table-alist)
- item)
- (while (consp alist)
- (cond ((null (car alist))
- (error "Missing alist item"))
- ((null (car (car alist)))
- (error "Alist item with null car"))
- ;; this functionality not used
- ((symbolp (setq item (car (car alist))))
- (or (null (cdr (car alist)))
- (error "Alist item expected to have null cdr"))
- (while (symbolp item)
- (setq item (symbol-value item)))
- (setcar (car alist) item)))
- (cond ((not (syntax-table-p (car (car alist))))
- (error "Alist item car expected to be symbol table"))
- ((null (cdr (car alist)))
- (setcdr (car alist)
- (make-symbol-syntax-table (car (car alist))))))
- (setq alist (cdr alist)))))
-
- (defun get-symbol-syntax-table (norm-table)
- (let (result)
- (if (setq result (assq norm-table symbol-syntax-table-alist))
- nil
- (update-symbol-syntax-table-alist)
- (if (setq result (assq norm-table symbol-syntax-table-alist))
- nil
- (setq symbol-syntax-table-alist
- (cons (list norm-table)
- symbol-syntax-table-alist))
- (update-symbol-syntax-table-alist)
- (or (setq result (assq norm-table symbol-syntax-table-alist))
- (error "Syntax table missing from symbol-syntax-table-alist"))))
- (or (setq result (cdr result))
- (error "Alist item has null cdr"))
- (or (syntax-table-p result)
- (error "Non-syntax-table item in alist"))
- result))
-
- (defun make-symbol-syntax-table (in-table)
- (let ((out-table (copy-syntax-table in-table)))
- (map-syntax-table
- #'(lambda (key value)
- (if (eq ?_ (char-syntax-from-code value))
- (put-char-table key (set-char-syntax-in-code value ?w)
- out-table))
- nil)
- out-table)
- out-table))
-
- ;; stuff for examining contents of syntax tables
- ;;(show-chars-with-syntax
- ;; '(c-mode-syntax-table
- ;; emacs-lisp-mode-syntax-table
- ;; lisp-mode-syntax-table
- ;; text-mode-syntax-table)
- ;; ?_)
-
- (defun show-chars-with-syntax (tables syntax)
- (let ((osyn (syntax-table))
- (schars nil))
- (unwind-protect
- (while (consp tables)
- (let* ((chars nil)
- (table-symbol (car tables))
- (table table-symbol)
- (i 0))
- (or (symbolp table-symbol)
- (error "bad argument non-symbol"))
- (while (symbolp table)
- (setq table (symbol-value table)))
- (map-syntax-table
- #'(lambda (key value)
- (if (eq syntax (char-syntax-from-code value))
- (setq chars (cons key chars)))
- nil)
- table)
- (setq schars (cons (list table-symbol (nreverse chars))
- schars)))
- (setq tables (cdr tables))))
- (nreverse schars)))
-
- (provide 'symbol-syntax)
-