/*
* Copyright (C) 2010-2016 JPEXS, All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3.0 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library.
*/
package com.jpexs.decompiler.flash.abc.avm2.model;
import com.jpexs.decompiler.flash.SourceGeneratorLocalData;
import com.jpexs.decompiler.flash.abc.avm2.instructions.AVM2Instruction;
import com.jpexs.decompiler.flash.abc.avm2.instructions.AVM2Instructions;
import com.jpexs.decompiler.flash.ecma.Undefined;
import com.jpexs.decompiler.flash.helpers.GraphTextWriter;
import com.jpexs.decompiler.graph.CompilationException;
import com.jpexs.decompiler.graph.GraphSourceItem;
import com.jpexs.decompiler.graph.GraphTargetItem;
import com.jpexs.decompiler.graph.SimpleValue;
import com.jpexs.decompiler.graph.SourceGenerator;
import com.jpexs.decompiler.graph.TypeItem;
import com.jpexs.decompiler.graph.model.LocalData;
import java.util.List;
import java.util.Set;
/**
*
* @author JPEXS
*/
public class UndefinedAVM2Item extends AVM2Item implements SimpleValue {
public UndefinedAVM2Item(GraphSourceItem instruction, GraphSourceItem lineStartIns) {
super(instruction, lineStartIns, PRECEDENCE_PRIMARY);
}
@Override
public GraphTextWriter appendTo(GraphTextWriter writer, LocalData localData) {
return writer.append("undefined");
}
@Override
public boolean isCompileTime(Set<GraphTargetItem> dependencies) {
return true;
}
@Override
public Object getResult() {
return Undefined.INSTANCE;
}
@Override
public GraphTargetItem returnType() {
return TypeItem.UNBOUNDED;
}
@Override
public boolean hasReturnValue() {
return true;
}
@Override
public List<GraphSourceItem> toSource(SourceGeneratorLocalData localData, SourceGenerator generator) throws CompilationException {
return toSourceMerge(localData, generator,
new AVM2Instruction(0, AVM2Instructions.PushUndefined, null)
);
}
@Override
public boolean isSimpleValue() {
return true;
}
}