;;; ebnf-iso.el --- parser for ISO EBNF
-;; Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
+;; Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004
+;; Free Software Foundation, Inc.
-;; Author: Vinicius Jose Latorre <vinicius@cpqd.com.br>
-;; Maintainer: Vinicius Jose Latorre <vinicius@cpqd.com.br>
+;; Author: Vinicius Jose Latorre <viniciusjl@ig.com.br>
+;; Maintainer: Vinicius Jose Latorre <viniciusjl@ig.com.br>
+;; Time-stamp: <2004/04/03 16:48:52 vinicius>
;; Keywords: wp, ebnf, PostScript
-;; Time-stamp: <2001/09/24 10:17:20 vinicius>
-;; Version: 1.6
+;; Version: 1.8
;; This file is part of GNU Emacs.
;; ISO EBNF accepts the characters given by <character> production above,
;; HORIZONTAL TAB (^I), VERTICAL TAB (^K), NEWLINE (^J or ^M) and FORM FEED
;; (^L), any other characters are illegal. But ebnf2ps accepts also the
-;; european 8-bit accentuated characters (from \240 to \377).
+;; european 8-bit accentuated characters (from \240 to \377) and underscore
+;; (_).
;;
;;
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
"Value returned by `ebnf-iso-lex' function.")
-(defconst ebnf-no-meta-identifier nil)
+(defvar ebnf-no-meta-identifier nil
+ "Used by `ebnf-iso-term' and `ebnf-iso-lex' functions.")
\f
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;; Syntatic analyzer
+;; Syntactic analyzer
;;; ISO EBNF = syntax rule, {syntax rule};
(eq token 'catenate))
(setq seq (cons term seq)))
(cons token
- (cond
- ;; null sequence
- ((null seq)
- term)
- ;; sequence with only one element
- ((and (null term) (= (length seq) 1))
- (car seq))
- ;; a real sequence
- (t
- (ebnf-make-sequence (nreverse (cons term seq))))
- ))))
+ (ebnf-token-sequence (if term
+ (cons term seq)
+ seq)))))
;;; term = factor, ['-', exception];
;; Override form feed character:
(aset table ?\f 'form-feed) ; [FF] form feed
;; Override other lexical characters:
+ (aset table ?_ 'non-terminal)
(aset table ?\" 'double-terminal)
(aset table ?\' 'single-terminal)
(aset table ?\? 'special)
;; replace the range "\240-\377" (see `ebnf-range-regexp').
(defconst ebnf-iso-non-terminal-chars
- (ebnf-range-regexp " 0-9A-Za-z" ?\240 ?\377))
+ (ebnf-range-regexp " 0-9A-Za-z_" ?\240 ?\377))
(defun ebnf-iso-lex ()
'integer)
;; special: ?special?
((eq token 'special)
- (setq ebnf-iso-lex (concat "?"
+ (setq ebnf-iso-lex (concat (and ebnf-special-show-delimiter "?")
(ebnf-string " ->@-~" ?\? "special")
- "?"))
+ (and ebnf-special-show-delimiter "?")))
'special)
;; terminal: "string"
((eq token 'double-terminal)
(provide 'ebnf-iso)
+;;; arch-tag: 03315eef-8f64-404a-bf9d-256d42442ee3
;;; ebnf-iso.el ends here