/*
* #%~
* 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.assistant.pattern;
import java.util.LinkedList;
import java.util.List;
import org.overture.ast.analysis.AnalysisException;
import org.overture.ast.analysis.intf.IQuestionAnswer;
import org.overture.ast.assistant.IAstAssistant;
import org.overture.ast.factory.AstFactory;
import org.overture.ast.intf.lex.ILexLocation;
import org.overture.ast.patterns.ANamePatternPair;
import org.overture.ast.patterns.PPattern;
import org.overture.ast.types.PType;
import org.overture.ast.util.PTypeSet;
import org.overture.typechecker.TypeCheckInfo;
import org.overture.typechecker.assistant.ITypeCheckerAssistantFactory;
public class PPatternListAssistantTC implements IAstAssistant
{
protected ITypeCheckerAssistantFactory af;
public PPatternListAssistantTC(ITypeCheckerAssistantFactory af)
{
this.af = af;
}
public void typeResolve(List<PPattern> pp,
IQuestionAnswer<TypeCheckInfo, PType> rootVisitor,
TypeCheckInfo question) throws AnalysisException
{
for (PPattern pattern : pp)
{
af.createPPatternAssistant().typeResolve(pattern, rootVisitor, question);
}
}
public void typeResolvePairs(List<ANamePatternPair> npplist,
IQuestionAnswer<TypeCheckInfo, PType> rootVisitor,
TypeCheckInfo question) throws AnalysisException
{
for (ANamePatternPair npp : npplist)
{
af.createPPatternAssistant().typeResolve(npp.getPattern(), rootVisitor, question);
}
}
public void unResolve(List<PPattern> pp)
{
for (PPattern pPattern : pp)
{
af.createPPatternAssistant().unResolve(pPattern);
}
}
public PType getPossibleType(LinkedList<PPattern> plist,
ILexLocation location)
{
switch (plist.size())
{
case 0:
return AstFactory.newAUnknownType(location);
case 1:
return af.createPPatternAssistant().getPossibleType(plist.get(0));
default:
PTypeSet list = new PTypeSet(af);
for (PPattern p : plist)
{
list.add(af.createPPatternAssistant().getPossibleType(p));
}
return list.getType(location); // NB. a union of types
}
}
public boolean isSimple(LinkedList<PPattern> p)
{
for (PPattern pattern : p)
{
if (!af.createPPatternAssistant().isSimple(pattern))
{
return false; // NB. AND
}
}
return true;
}
public boolean alwaysMatches(List<PPattern> pl)
{
for (PPattern p : pl)
{
if (!af.createPPatternAssistant().alwaysMatches(p))
{
return false; // NB. AND
}
}
return true;
}
}