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;;; c-lex.l -- C fontifier for Skribilo.
;;;
;;; Copyright 2004 Erick Gallesio - I3S-CNRS/ESSI <eg@essi.fr>
;;; Copyright 2007 Ludovic Court�s <ludo@gnu.org>
;;;
;;; This program 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 of the License, or
;;; (at your option) any later version.
;;;
;;; This program 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 this program; if not, write to the Free Software
;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
;;; USA.
space [ \n\9]
letter [_a-zA-Z]
alphanum [_a-zA-Z0-9]
%%
;; Strings
\"[^\"]*\" (new markup
(markup '&source-string)
(body yytext))
;; Comments
;; FIXME: We shouldn't exclude `/' from comments but we do so to match the
;; shortest multi-line comment.
/\*(\n|[^/])*\*/ (let* ((not-line (char-set-complement (char-set #\newline)))
(lines (string-tokenize yytext not-line)))
(reverse!
(pair-fold (lambda (line* result)
(let* ((line (car line*))
(last? (null? (cdr line*)))
(markup
(new markup
(markup '&source-line-comment)
(body line))))
(if last?
(cons markup result)
(cons* (string #\newline)
markup result))))
'()
lines)))
//.* (new markup
(markup '&source-line-comment)
(body yytext))
;; Identifiers (only letters since we are interested in keywords only)
[_a-zA-Z]+ (let* ((ident (string->symbol yytext))
(tmp (memq ident (*the-keys*))))
(if tmp
(new markup
(markup '&source-module)
(body yytext))
yytext))
;; Regular text (excluding `/' and `*')
[^\"a-zA-Z/*]+ (begin yytext)
;; `/' and `*' alone.
/[^\*] (begin yytext)
\*[^/] (begin yytext)
<<EOF>> 'eof
<<ERROR>> (skribe-error 'c-fontifier "Parse error" yytext)
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