/*
 * Copyright (c) 2007 The Akuma Project
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * $Id: lexer.lxi 130 2007-05-29 12:54:04Z asmodai $
 */
/*
 *  		 Crown Copyright (c) 1997
 *  
 *  This TenDRA(r) Computer Program is subject to Copyright
 *  owned by the United Kingdom Secretary of State for Defence
 *  acting through the Defence Evaluation and Research Agency
 *  (DERA).  It is made available to Recipients with a
 *  royalty-free licence for its use, reproduction, transfer
 *  to other parties and amendment for any purpose not excluding
 *  product development provided that any such use et cetera
 *  shall be deemed to be acceptance of the following conditions:-
 *  
 *      (1) Its Recipients shall ensure that this Notice is
 *      reproduced upon any copies or amended versions of it;
 *  
 *      (2) Any amended version of it shall be clearly marked to
 *      show both the nature of and the organisation responsible
 *      for the relevant amendment or amendments;
 *  
 *      (3) Its onward transfer from a recipient to another
 *      party shall be deemed to be that party's acceptance of
 *      these conditions;
 *  
 *      (4) DERA gives no warranty or assurance as to its
 *      quality or suitability for any purpose and DERA accepts
 *      no liability whatsoever in relation to any use to which
 *      it may be put.
 */


/*
 * LEXICAL ANALYSER FOR LEXI
 *
 * This file describes the lexical analyser used by lexi.
 */

/* Character groups */
GROUP white = " \t\n\r";
GROUP alpha = {A-Z} + {a-z} + "_";
GROUP digit = {0-9};
GROUP alphanum = "[alpha][digit]";

/* Simple symbols */
TOKEN "(" -> $open;
TOKEN ")" -> $close;
TOKEN "{" -> $open-brace;
TOKEN "}" -> $close-brace;
TOKEN "->" -> $arrow;
TOKEN ";" -> $semicolon;
TOKEN "=" -> $equal;
TOKEN "+" -> $plus;
TOKEN "\e" -> $eof;

/* Special strings */
TOKEN "{A-Z}" -> $upper;
TOKEN "{a-z}" -> $lower;
TOKEN "{0-9}" -> $digit;

/* Comments, strings and identifiers */
TOKEN "/*" -> get_comment();
TOKEN "\"" -> get_string();
TOKEN "[alpha]" -> get_identifier();
TOKEN "$[alpha]" -> get_sid_ident();

/* Keywords */
KEYWORD "GROUP" -> $group;
KEYWORD "KEYWORD" -> $keyword;
KEYWORD "MAPPING" -> $mapping;
KEYWORD "TOKEN" -> $token;
KEYWORD "white" -> $white;
KEYWORD "IF" -> $if;
KEYWORD "ELSE" -> $else;