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6594deb0 ER |
1 | ;;; mim-syntax.el --- syntax checker for Mim (MDL). |
2 | ||
9750e079 ER |
3 | ;; Copyright (C) 1985 Free Software Foundation, Inc. |
4 | ||
e5167999 ER |
5 | ;; Author: K. Shane Hartman |
6 | ;; Maintainer: FSF | |
fd7fa35a | 7 | ;; Keywords: languages |
e5167999 | 8 | |
0d20f9a0 JB |
9 | ;; This file is part of GNU Emacs. |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 13 | ;; the Free Software Foundation; either version 2, or (at your option) |
0d20f9a0 JB |
14 | ;; any later version. |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
23 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | ||
e5167999 | 25 | ;;; Code: |
0d20f9a0 JB |
26 | |
27 | (require 'mim-mode) | |
28 | ||
29 | (defun slow-syntax-check-mim () | |
30 | "Check Mim syntax slowly. | |
31 | Points out the context of the error, if the syntax is incorrect." | |
32 | (interactive) | |
33 | (message "checking syntax...") | |
34 | (let ((stop (point-max)) point-stack current last-bracket whoops last-point) | |
35 | (save-excursion | |
36 | (goto-char (point-min)) | |
37 | (while (and (not whoops) | |
38 | (re-search-forward "\\s(\\|\\s)\\|\"\\|[\\]" stop t)) | |
39 | (setq current (preceding-char)) | |
40 | (cond ((= current ?\") | |
41 | (condition-case nil | |
42 | (progn (re-search-forward "[^\\]\"") | |
43 | (setq current nil)) | |
44 | (error (setq whoops (point))))) | |
45 | ((= current ?\\) | |
46 | (condition-case nil (forward-char 1) (error nil))) | |
47 | ((= (char-syntax current) ?\)) | |
48 | (if (or (not last-bracket) | |
49 | (not (= (logand (lsh (aref (syntax-table) last-bracket) -8) | |
50 | ?\177) | |
51 | current))) | |
52 | (setq whoops (point)) | |
53 | (setq last-point (car point-stack)) | |
54 | (setq last-bracket (if last-point (char-after (1- last-point)))) | |
55 | (setq point-stack (cdr point-stack)))) | |
56 | (t | |
57 | (if last-point (setq point-stack (cons last-point point-stack))) | |
58 | (setq last-point (point)) | |
59 | (setq last-bracket current))))) | |
60 | (cond ((not (or whoops last-point)) | |
61 | (message "Syntax correct")) | |
62 | (whoops | |
63 | (goto-char whoops) | |
64 | (cond ((equal current ?\") | |
65 | (error "Unterminated string")) | |
66 | ((not last-point) | |
67 | (error "Extraneous %s" (char-to-string current))) | |
68 | (t | |
69 | (error "Mismatched %s with %s" | |
70 | (save-excursion | |
71 | (setq whoops (1- (point))) | |
72 | (goto-char (1- last-point)) | |
73 | (buffer-substring (point) | |
74 | (min (progn (end-of-line) (point)) | |
75 | whoops))) | |
76 | (char-to-string current))))) | |
77 | (t | |
78 | (goto-char last-point) | |
79 | (error "Unmatched %s" (char-to-string last-bracket)))))) | |
80 | ||
81 | (defun fast-syntax-check-mim () | |
82 | "Checks Mim syntax quickly. | |
83 | Answers correct or incorrect, cannot point out the error context." | |
84 | (interactive) | |
85 | (save-excursion | |
86 | (goto-char (point-min)) | |
87 | (let (state) | |
88 | (while (and (not (eobp)) | |
89 | (equal (car (setq state (parse-partial-sexp (point) (point-max) 0))) | |
90 | 0))) | |
91 | (if (equal (car state) 0) | |
92 | (message "Syntax correct") | |
93 | (error "Syntax incorrect"))))) | |
94 | ||
6594deb0 | 95 | ;;; mim-syntax.el ends here |