/*
* Copyright 2010-2015 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.annotations.Nullable;
import org.jetbrains.kotlin.descriptors.ClassDescriptor;
import org.jetbrains.kotlin.descriptors.DeclarationDescriptor;
import org.jetbrains.kotlin.descriptors.PropertyDescriptor;
import org.jetbrains.kotlin.js.backend.ast.JsExpression;
import org.jetbrains.kotlin.js.translate.context.TranslationContext;
import org.jetbrains.kotlin.js.translate.general.AbstractTranslator;
import org.jetbrains.kotlin.js.translate.reference.AccessTranslationUtils;
import org.jetbrains.kotlin.js.translate.reference.AccessTranslator;
import org.jetbrains.kotlin.js.translate.reference.BackingFieldAccessTranslator;
import org.jetbrains.kotlin.lexer.KtToken;
import org.jetbrains.kotlin.psi.*;
import org.jetbrains.kotlin.types.expressions.OperatorConventions;
import static org.jetbrains.kotlin.js.translate.utils.BindingUtils.getDescriptorForReferenceExpression;
import static org.jetbrains.kotlin.js.translate.utils.BindingUtils.isVariableReassignment;
import static org.jetbrains.kotlin.js.translate.utils.PsiUtils.getSimpleName;
import static org.jetbrains.kotlin.js.translate.utils.PsiUtils.isAssignment;
import static org.jetbrains.kotlin.js.translate.utils.TranslationUtils.hasCorrespondingFunctionIntrinsic;
public abstract class AssignmentTranslator extends AbstractTranslator {
public static boolean isAssignmentOperator(KtToken operationToken) {
return (OperatorConventions.ASSIGNMENT_OPERATIONS.keySet().contains(operationToken) || isAssignment(operationToken));
}
@NotNull
public static JsExpression translate(@NotNull KtBinaryExpression expression, @NotNull TranslationContext context) {
if (hasCorrespondingFunctionIntrinsic(context, expression)) {
return IntrinsicAssignmentTranslator.doTranslate(expression, context);
}
return OverloadedAssignmentTranslator.doTranslate(expression, context);
}
@NotNull
protected final KtBinaryExpression expression;
protected final boolean isVariableReassignment;
protected AssignmentTranslator(@NotNull KtBinaryExpression expression, @NotNull TranslationContext context) {
super(context);
this.expression = expression;
this.isVariableReassignment = isVariableReassignment(context.bindingContext(), expression);
assert expression.getLeft() != null : "No left-hand side: " + expression.getText();
}
protected final AccessTranslator createAccessTranslator(@NotNull KtExpression left, boolean forceOrderOfEvaluation) {
if (isReferenceToBackingFieldFromConstructor(left, context())) {
KtSimpleNameExpression simpleName = getSimpleName(left);
assert simpleName != null;
return BackingFieldAccessTranslator.newInstance(simpleName, context());
}
else {
return AccessTranslationUtils.getAccessTranslator(left, context(), forceOrderOfEvaluation);
}
}
private static boolean isReferenceToBackingFieldFromConstructor(
@NotNull KtExpression expression,
@NotNull TranslationContext context
) {
if (expression instanceof KtSimpleNameExpression) {
KtSimpleNameExpression nameExpression = (KtSimpleNameExpression) expression;
DeclarationDescriptor descriptor = getDescriptorForReferenceExpression(context.bindingContext(), nameExpression);
return isReferenceToBackingFieldFromConstructor(descriptor, context);
}
else if (expression instanceof KtDotQualifiedExpression) {
KtDotQualifiedExpression qualifiedExpression = (KtDotQualifiedExpression) expression;
if (qualifiedExpression.getReceiverExpression() instanceof KtThisExpression &&
qualifiedExpression.getSelectorExpression() instanceof KtSimpleNameExpression
) {
KtSimpleNameExpression nameExpression = (KtSimpleNameExpression) qualifiedExpression.getSelectorExpression();
DeclarationDescriptor descriptor = getDescriptorForReferenceExpression(context.bindingContext(), nameExpression);
return isReferenceToBackingFieldFromConstructor(descriptor, context);
}
}
return false;
}
private static boolean isReferenceToBackingFieldFromConstructor(
@Nullable DeclarationDescriptor descriptor,
@NotNull TranslationContext context
) {
if (!(descriptor instanceof PropertyDescriptor)) return false;
PropertyDescriptor propertyDescriptor = (PropertyDescriptor) descriptor;
if (!(context.getDeclarationDescriptor() instanceof ClassDescriptor)) return false;
ClassDescriptor classDescriptor = (ClassDescriptor) context.getDeclarationDescriptor();
if (classDescriptor != propertyDescriptor.getContainingDeclaration()) return false;
return !propertyDescriptor.isVar();
}
}