/*
* #%~
* The VDM Type Checker
* %%
* Copyright (C) 2008 - 2014 Overture
* %%
* 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 3 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, see
* <http://www.gnu.org/licenses/gpl-3.0.html>.
* #~%
*/
package org.overture.typechecker.utilities.pattern;
import org.overture.ast.analysis.AnalysisException;
import org.overture.ast.analysis.AnswerAdaptor;
import org.overture.ast.node.INode;
import org.overture.ast.patterns.AIdentifierPattern;
import org.overture.ast.patterns.AIgnorePattern;
import org.overture.ast.patterns.ARecordPattern;
import org.overture.ast.patterns.ATuplePattern;
import org.overture.ast.patterns.PPattern;
import org.overture.typechecker.assistant.ITypeCheckerAssistantFactory;
/**
* Used to check if a given pattern always matches with its type.
*
* @author kel
*/
public class AlwaysMatchingPatternChecker extends AnswerAdaptor<Boolean>
{
protected ITypeCheckerAssistantFactory af;
public AlwaysMatchingPatternChecker(ITypeCheckerAssistantFactory af)
{
this.af = af;
}
@Override
public Boolean caseARecordPattern(ARecordPattern pattern)
throws AnalysisException
{
return af.createPPatternListAssistant().alwaysMatches(pattern.getPlist());
}
@Override
public Boolean caseAIgnorePattern(AIgnorePattern pattern)
throws AnalysisException
{
return true;
}
@Override
public Boolean caseAIdentifierPattern(AIdentifierPattern pattern)
throws AnalysisException
{
return true;
}
@Override
public Boolean caseATuplePattern(ATuplePattern pattern)
throws AnalysisException
{
return af.createPPatternListAssistant().alwaysMatches(pattern.getPlist());
}
@Override
public Boolean defaultPPattern(PPattern pattern) throws AnalysisException
{
return false;
}
@Override
public Boolean createNewReturnValue(INode node) throws AnalysisException
{
// TODO Auto-generated method stub
return false;
}
@Override
public Boolean createNewReturnValue(Object node) throws AnalysisException
{
return false;
}
}