001    /*
002     * Copyright 2010-2015 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    
017    package org.jetbrains.kotlin.js.translate.context;
018    
019    import com.google.dart.compiler.backend.js.ast.*;
020    import com.google.dart.compiler.backend.js.ast.metadata.MetadataProperties;
021    import org.jetbrains.annotations.NotNull;
022    import org.jetbrains.annotations.Nullable;
023    import org.jetbrains.kotlin.js.translate.utils.JsAstUtils;
024    
025    public class TemporaryVariable {
026    
027        /*package*/ static TemporaryVariable create(@NotNull JsName temporaryName, @Nullable JsExpression initExpression) {
028            JsBinaryOperation rhs = null;
029            if (initExpression != null) {
030                rhs = JsAstUtils.assignment(temporaryName.makeRef(), initExpression);
031                MetadataProperties.setSynthetic(rhs, true);
032            }
033            return new TemporaryVariable(temporaryName, rhs);
034        }
035    
036        @Nullable
037        private final JsExpression assignmentExpression;
038        @NotNull
039        private final JsName variableName;
040    
041        protected TemporaryVariable(@NotNull JsName temporaryName, @Nullable JsExpression assignmentExpression) {
042            this.variableName = temporaryName;
043            this.assignmentExpression = assignmentExpression;
044        }
045    
046        @NotNull
047        public JsNameRef reference() {
048            return variableName.makeRef();
049        }
050    
051        @NotNull
052        public JsName name() {
053            return variableName;
054        }
055    
056        @NotNull
057        public JsExpression assignmentExpression() {
058            assert assignmentExpression != null;
059            return assignmentExpression;
060        }
061    
062        @NotNull
063        public JsStatement assignmentStatement() {
064            return JsAstUtils.asSyntheticStatement(assignmentExpression());
065        }
066    }