/*
* Copyright 2003-2011 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jetbrains.mps.lang.dataFlow.framework.instructions;
import jetbrains.mps.lang.dataFlow.framework.ProgramState;
import jetbrains.mps.lang.dataFlow.framework.Program.TryFinallyInfo;
import java.util.ArrayList;
import java.util.List;
public class RetInstruction extends Instruction {
public RetInstruction() {
}
public RetInstruction(String ruleNodeReference) {
super(ruleNodeReference);
}
@Override
public List<ProgramState> succ(ProgramState s) {
List<ProgramState> result = new ArrayList<ProgramState>();
TryFinallyInfo blockInfo = getEnclosingBlock();
if (blockInfo == null) {
result.add(new ProgramState(getProgram().getEnd(), true));
} else {
if (isBefore(blockInfo.getFinally())) {
result.add(new ProgramState(blockInfo.getFinally(), true));
} else {
result.add(new ProgramState(blockInfo.getEndTry(), true));
}
}
return result;
}
@Override
public String commandPresentation() {
return "ret";
}
}