| /* |
| * Copyright 2000-2009 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 com.intellij.codeInspection.dataFlow.instructions; |
| |
| import com.intellij.codeInspection.dataFlow.DataFlowRunner; |
| import com.intellij.codeInspection.dataFlow.DfaInstructionState; |
| import com.intellij.codeInspection.dataFlow.DfaMemoryState; |
| import com.intellij.codeInspection.dataFlow.InstructionVisitor; |
| import com.intellij.codeInspection.dataFlow.value.DfaValue; |
| |
| /** |
| * @author max |
| */ |
| public class SwapInstruction extends Instruction { |
| |
| @Override |
| public DfaInstructionState[] accept(DataFlowRunner runner, DfaMemoryState stateBefore, InstructionVisitor visitor) { |
| final DfaValue a = stateBefore.pop(); |
| final DfaValue b = stateBefore.pop(); |
| stateBefore.push(a); |
| stateBefore.push(b); |
| Instruction nextInstruction = runner.getInstruction(getIndex() + 1); |
| return new DfaInstructionState[]{new DfaInstructionState(nextInstruction, stateBefore)}; |
| } |
| |
| public String toString() { |
| return "SWAP"; |
| } |
| } |