001/*
002 * Copyright 2010-2013 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.jetbrains.k2js.translate.context;
018
019import com.google.dart.compiler.backend.js.ast.JsExpression;
020import com.google.dart.compiler.backend.js.ast.JsName;
021import com.google.dart.compiler.backend.js.ast.JsNameRef;
022import org.jetbrains.annotations.NotNull;
023import org.jetbrains.annotations.Nullable;
024import org.jetbrains.k2js.translate.utils.JsAstUtils;
025
026public class TemporaryVariable {
027
028    /*package*/ static TemporaryVariable create(@NotNull JsName temporaryName, @Nullable JsExpression initExpression) {
029        return new TemporaryVariable(temporaryName, initExpression == null ? null : JsAstUtils.assignment(temporaryName.makeRef(), initExpression));
030    }
031
032    @Nullable
033    private final JsExpression assignmentExpression;
034    @NotNull
035    private final JsName variableName;
036
037    protected TemporaryVariable(@NotNull JsName temporaryName, @Nullable JsExpression assignmentExpression) {
038        this.variableName = temporaryName;
039        this.assignmentExpression = assignmentExpression;
040    }
041
042    @NotNull
043    public JsNameRef reference() {
044        return variableName.makeRef();
045    }
046
047    @NotNull
048    public JsName name() {
049        return variableName;
050    }
051
052    @NotNull
053    public JsExpression assignmentExpression() {
054        assert assignmentExpression != null;
055        return assignmentExpression;
056    }
057}