1 (* Copyright (C) 2000, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM 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 HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://cs.unibo.it/helm/.
26 (******************************************************************************)
30 (* Ferruccio Guidi <fguidi@cs.unibo.it> *)
34 (******************************************************************************)
40 let SPC = [' ' '\t' '\n']+
41 let ALPHA = ['A'-'Z' 'a'-'z']
43 let IDEN = ALPHA (NUM | ALPHA)*
44 let QSTR = [^ '"' '\\']+
46 rule string_token = parse
48 | '\\' _ { STR (String.sub (Lexing.lexeme lexbuf) 1 1) }
49 | QSTR { STR (Lexing.lexeme lexbuf) }
51 and query_token = parse
52 | SPC { query_token lexbuf }
53 | '"' { STR (qstr string_token lexbuf) }
66 | "attribute" { ATTRIB }
74 | "intersect" { INTER }
89 | IDEN { ID (Lexing.lexeme lexbuf) }
91 and result_token = parse
92 | SPC { result_token lexbuf }
93 | '"' { STR (qstr string_token lexbuf) }