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/*******************************************************************************
 * Copyright (c) 2008 The University of York.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Dimitrios Kolovos - initial API and implementation
 * -----------------------------------------------------------------------------
 * ANTLR 3 License
 * [The "BSD licence"]
 * Copyright (c) 2005-2008 Terence Parr
 * All rights reserved.
 *  
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ******************************************************************************/
parser grammar EclParserRules;
options {backtrack=true; output=AST;}

tokens {
	MATCH;
	COMPARE;
	DO;
	LEFTDOMAIN;
	RIGHTDOMAIN;
}

eclModuleContent
	:	matchRule | erlModuleContent
	;

matchRule
	@after {
		$tree.getExtraTokens().add($ob);
		$tree.getExtraTokens().add($cb);
	} 
	:	r='rule'^ rule=NAME 'match'! formalParameter leftDomain? 'with'! formalParameter rightDomain?
	extendz? ob='{'! guard? compareBlock? doBlock? cb='}'!
	{$r.setType(MATCH);}
	;

compareBlock
	:	c='compare'^ expressionOrStatementBlock
	{$c.setType(COMPARE);}
	;

doBlock
	:	d='do'^ statementBlock
	{$d.setType(DO);}
	;
	
leftDomain 
	:	(c='in'^) expressionOrStatementBlock
	{$c.setType(LEFTDOMAIN);}
	;
	
rightDomain 
	:	(c='in'^|c='from'^) expressionOrStatementBlock
	{$c.setType(RIGHTDOMAIN);}
	;