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96 lines
3.1 KiB
EmacsLisp
96 lines
3.1 KiB
EmacsLisp
;;; mim-syntax.el --- syntax checker for Mim (MDL).
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;; Copyright (C) 1985 Free Software Foundation, Inc.
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;; Author: K. Shane Hartman
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;; Maintainer: FSF
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;; Keywords: languages
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Code:
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(require 'mim-mode)
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(defun slow-syntax-check-mim ()
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"Check Mim syntax slowly.
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Points out the context of the error, if the syntax is incorrect."
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(interactive)
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(message "checking syntax...")
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(let ((stop (point-max)) point-stack current last-bracket whoops last-point)
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(save-excursion
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(goto-char (point-min))
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(while (and (not whoops)
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(re-search-forward "\\s(\\|\\s)\\|\"\\|[\\]" stop t))
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(setq current (preceding-char))
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(cond ((= current ?\")
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(condition-case nil
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(progn (re-search-forward "[^\\]\"")
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(setq current nil))
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(error (setq whoops (point)))))
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((= current ?\\)
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(condition-case nil (forward-char 1) (error nil)))
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((= (char-syntax current) ?\))
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(if (or (not last-bracket)
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(not (= (logand (lsh (aref (syntax-table) last-bracket) -8)
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?\177)
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current)))
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(setq whoops (point))
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(setq last-point (car point-stack))
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(setq last-bracket (if last-point (char-after (1- last-point))))
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(setq point-stack (cdr point-stack))))
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(t
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(if last-point (setq point-stack (cons last-point point-stack)))
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(setq last-point (point))
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(setq last-bracket current)))))
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(cond ((not (or whoops last-point))
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(message "Syntax correct"))
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(whoops
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(goto-char whoops)
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(cond ((equal current ?\")
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(error "Unterminated string"))
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((not last-point)
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(error "Extraneous %s" (char-to-string current)))
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(t
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(error "Mismatched %s with %s"
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(save-excursion
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(setq whoops (1- (point)))
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(goto-char (1- last-point))
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(buffer-substring (point)
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(min (progn (end-of-line) (point))
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whoops)))
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(char-to-string current)))))
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(t
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(goto-char last-point)
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(error "Unmatched %s" (char-to-string last-bracket))))))
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(defun fast-syntax-check-mim ()
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"Checks Mim syntax quickly.
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Answers correct or incorrect, cannot point out the error context."
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(interactive)
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(save-excursion
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(goto-char (point-min))
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(let (state)
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(while (and (not (eobp))
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(equal (car (setq state (parse-partial-sexp (point) (point-max) 0)))
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0)))
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(if (equal (car state) 0)
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(message "Syntax correct")
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(error "Syntax incorrect")))))
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;;; mim-syntax.el ends here
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