Initial revision
[emacs.git] / lisp / mim-syntax.el
blobc9a95b50f2f8ccd938404c7933e26c8d07a23ed8
1 ;; Syntax checker for Mim (MDL).
2 ;; Copyright (C) 1985 Free Software Foundation, Inc.
3 ;; Principal author K. Shane Hartman
5 ;; This file is part of GNU Emacs.
7 ;; GNU Emacs is free software; you can redistribute it and/or modify
8 ;; it under the terms of the GNU General Public License as published by
9 ;; the Free Software Foundation; either version 1, or (at your option)
10 ;; any later version.
12 ;; GNU Emacs is distributed in the hope that it will be useful,
13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 ;; GNU General Public License for more details.
17 ;; You should have received a copy of the GNU General Public License
18 ;; along with GNU Emacs; see the file COPYING. If not, write to
19 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
22 (require 'mim-mode)
24 (defun slow-syntax-check-mim ()
25 "Check Mim syntax slowly.
26 Points out the context of the error, if the syntax is incorrect."
27 (interactive)
28 (message "checking syntax...")
29 (let ((stop (point-max)) point-stack current last-bracket whoops last-point)
30 (save-excursion
31 (goto-char (point-min))
32 (while (and (not whoops)
33 (re-search-forward "\\s(\\|\\s)\\|\"\\|[\\]" stop t))
34 (setq current (preceding-char))
35 (cond ((= current ?\")
36 (condition-case nil
37 (progn (re-search-forward "[^\\]\"")
38 (setq current nil))
39 (error (setq whoops (point)))))
40 ((= current ?\\)
41 (condition-case nil (forward-char 1) (error nil)))
42 ((= (char-syntax current) ?\))
43 (if (or (not last-bracket)
44 (not (= (logand (lsh (aref (syntax-table) last-bracket) -8)
45 ?\177)
46 current)))
47 (setq whoops (point))
48 (setq last-point (car point-stack))
49 (setq last-bracket (if last-point (char-after (1- last-point))))
50 (setq point-stack (cdr point-stack))))
52 (if last-point (setq point-stack (cons last-point point-stack)))
53 (setq last-point (point))
54 (setq last-bracket current)))))
55 (cond ((not (or whoops last-point))
56 (message "Syntax correct"))
57 (whoops
58 (goto-char whoops)
59 (cond ((equal current ?\")
60 (error "Unterminated string"))
61 ((not last-point)
62 (error "Extraneous %s" (char-to-string current)))
64 (error "Mismatched %s with %s"
65 (save-excursion
66 (setq whoops (1- (point)))
67 (goto-char (1- last-point))
68 (buffer-substring (point)
69 (min (progn (end-of-line) (point))
70 whoops)))
71 (char-to-string current)))))
73 (goto-char last-point)
74 (error "Unmatched %s" (char-to-string last-bracket))))))
76 (defun fast-syntax-check-mim ()
77 "Checks Mim syntax quickly.
78 Answers correct or incorrect, cannot point out the error context."
79 (interactive)
80 (save-excursion
81 (goto-char (point-min))
82 (let (state)
83 (while (and (not (eobp))
84 (equal (car (setq state (parse-partial-sexp (point) (point-max) 0)))
85 0)))
86 (if (equal (car state) 0)
87 (message "Syntax correct")
88 (error "Syntax incorrect")))))