org.jetbrains.kotlin.js.translate.operation.DynamicIncrementTranslator Maven / Gradle / Ivy
/*
* Copyright 2010-2017 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 org.jetbrains.kotlin.js.translate.operation;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.kotlin.js.backend.ast.*;
import org.jetbrains.kotlin.js.translate.context.TranslationContext;
import org.jetbrains.kotlin.lexer.KtToken;
import org.jetbrains.kotlin.lexer.KtTokens;
import org.jetbrains.kotlin.psi.KtUnaryExpression;
import static org.jetbrains.kotlin.js.translate.utils.PsiUtils.getOperationToken;
import static org.jetbrains.kotlin.js.translate.utils.PsiUtils.isPrefix;
import static org.jetbrains.kotlin.js.translate.utils.TranslationUtils.isSimpleNameExpressionNotDelegatedLocalVar;
public class DynamicIncrementTranslator extends IncrementTranslator {
@NotNull
public static JsExpression doTranslate(@NotNull KtUnaryExpression expression,
@NotNull TranslationContext context) {
return (new DynamicIncrementTranslator(expression, context))
.translate();
}
private DynamicIncrementTranslator(@NotNull KtUnaryExpression expression,
@NotNull TranslationContext context) {
super(expression, context);
}
@NotNull
private JsExpression translate() {
if (isSimpleNameExpressionNotDelegatedLocalVar(expression.getBaseExpression(), context())) {
return primitiveExpressionIncrement();
}
return translateIncrementExpression();
}
@NotNull
private JsExpression primitiveExpressionIncrement() {
JsUnaryOperator operator = OperatorTable.getUnaryOperator(getOperationToken(expression));
JsExpression getExpression = accessTranslator.translateAsGet();
if (isPrefix(expression)) {
return new JsPrefixOperation(operator, getExpression);
}
else {
return new JsPostfixOperation(operator, getExpression);
}
}
@Override
@NotNull
protected JsExpression operationExpression(@NotNull TranslationContext context, @NotNull JsExpression receiver) {
return unaryAsBinary(receiver);
}
@NotNull
private JsBinaryOperation unaryAsBinary(@NotNull JsExpression leftExpression) {
JsNumberLiteral oneLiteral = new JsIntLiteral(1);
KtToken token = getOperationToken(expression);
if (token.equals(KtTokens.PLUSPLUS)) {
return new JsBinaryOperation(JsBinaryOperator.ADD, leftExpression, oneLiteral);
}
if (token.equals(KtTokens.MINUSMINUS)) {
return new JsBinaryOperation(JsBinaryOperator.SUB, leftExpression, oneLiteral);
}
throw new AssertionError("This method should be called only for increment and decrement operators");
}
}