/*
* #%~
* 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;
import org.overture.ast.analysis.AnalysisException;
import org.overture.ast.analysis.AnswerAdaptor;
import org.overture.ast.node.INode;
import org.overture.ast.types.ABracketType;
import org.overture.ast.types.AFunctionType;
import org.overture.ast.types.ANamedInvariantType;
import org.overture.ast.types.AOptionalType;
import org.overture.ast.types.AUnionType;
import org.overture.ast.types.AUnknownType;
import org.overture.ast.types.PType;
import org.overture.ast.types.SInvariantType;
import org.overture.typechecker.assistant.ITypeCheckerAssistantFactory;
/**
* This class implements a way to check if a node is a function.
*
* @author kel
*/
public class PTypeFunctionChecker extends AnswerAdaptor<Boolean>
{
protected ITypeCheckerAssistantFactory af;
public PTypeFunctionChecker(ITypeCheckerAssistantFactory af)
{
this.af = af;
}
@Override
public Boolean caseABracketType(ABracketType node) throws AnalysisException
{
return node.getType().apply(THIS);
}
@Override
public Boolean caseAFunctionType(AFunctionType node)
throws AnalysisException
{
return true;
}
@Override
public Boolean defaultSInvariantType(SInvariantType node)
throws AnalysisException
{
if (node instanceof ANamedInvariantType)
{
if (node.getOpaque())
{
return false;
}
return ((ANamedInvariantType) node).getType().apply(THIS); // PTypeAssistantTC.isFunction(type.getType());
}
else
{
return false;
}
}
@Override
public Boolean caseAOptionalType(AOptionalType node)
throws AnalysisException
{
return node.getType().apply(THIS);
}
@Override
public Boolean caseAUnionType(AUnionType node) throws AnalysisException
{
// return af.createAUnionTypeAssistant().getFunction(node) != null;
return node.apply(af.getFunctionTypeFinder()) != null;
}
@Override
public Boolean caseAUnknownType(AUnknownType node) throws AnalysisException
{
return true;
}
@Override
public Boolean defaultPType(PType node) throws AnalysisException
{
return false;
}
@Override
public Boolean createNewReturnValue(INode node)
{
assert false : "should not happen";
return null;
}
@Override
public Boolean createNewReturnValue(Object node)
{
assert false : "should not happen";
return null;
}
}