org.jetbrains.kotlin.js.translate.operation.IntrinsicAssignmentTranslator Maven / Gradle / Ivy
/*
* 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.kotlin.builtins.KotlinBuiltIns;
import org.jetbrains.kotlin.js.backend.ast.JsBinaryOperation;
import org.jetbrains.kotlin.js.backend.ast.JsBinaryOperator;
import org.jetbrains.kotlin.js.backend.ast.JsBlock;
import org.jetbrains.kotlin.js.backend.ast.JsExpression;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.kotlin.js.translate.context.TranslationContext;
import org.jetbrains.kotlin.js.translate.reference.AccessTranslator;
import org.jetbrains.kotlin.js.translate.utils.JsAstUtils;
import org.jetbrains.kotlin.js.translate.utils.TranslationUtils;
import org.jetbrains.kotlin.lexer.KtSingleValueToken;
import org.jetbrains.kotlin.lexer.KtToken;
import org.jetbrains.kotlin.psi.KtBinaryExpression;
import org.jetbrains.kotlin.psi.KtExpression;
import org.jetbrains.kotlin.types.KotlinType;
import org.jetbrains.kotlin.types.expressions.OperatorConventions;
import static org.jetbrains.kotlin.js.translate.utils.PsiUtils.getOperationToken;
import static org.jetbrains.kotlin.js.translate.utils.PsiUtils.isAssignment;
import static org.jetbrains.kotlin.js.translate.utils.TranslationUtils.isSimpleNameExpressionNotDelegatedLocalVar;
public final class IntrinsicAssignmentTranslator extends AssignmentTranslator {
private final JsExpression right;
private final AccessTranslator accessTranslator;
private final boolean rightExpressionTrivial;
private final JsBlock rightBlock = new JsBlock();
@NotNull
public static JsExpression doTranslate(@NotNull KtBinaryExpression expression, @NotNull TranslationContext context) {
return (new IntrinsicAssignmentTranslator(expression, context)).translate();
}
private IntrinsicAssignmentTranslator(@NotNull KtBinaryExpression expression, @NotNull TranslationContext context) {
super(expression, context);
right = translateRightExpression(context, expression);
rightExpressionTrivial = rightBlock.isEmpty();
KtExpression left = expression.getLeft();
assert left != null;
accessTranslator = createAccessTranslator(left, !rightExpressionTrivial);
}
private JsExpression translateRightExpression(TranslationContext context, KtBinaryExpression expression) {
JsExpression result = TranslationUtils.translateRightExpression(context, expression, rightBlock);
KotlinType leftType = context.bindingContext().getType(expression.getLeft());
KotlinType rightType = context.bindingContext().getType(expression.getRight());
if (rightType != null && KotlinBuiltIns.isCharOrNullableChar(rightType)) {
if (leftType != null && KotlinBuiltIns.isStringOrNullableString(leftType)) {
result = JsAstUtils.charToString(result);
}
else if (leftType == null || !KotlinBuiltIns.isCharOrNullableChar(leftType)) {
result = JsAstUtils.charToBoxedChar(result);
}
}
return result;
}
@NotNull
private JsExpression translate() {
if (isAssignment(getOperationToken(expression))) {
return translateAsPlainAssignment();
}
return translateAsAssignmentOperation();
}
@NotNull
private JsExpression translateAsAssignmentOperation() {
if (isSimpleNameExpressionNotDelegatedLocalVar(expression.getLeft(), context()) && rightExpressionTrivial) {
return translateAsPlainAssignmentOperation();
}
return translateAsAssignToCounterpart();
}
@NotNull
private JsExpression translateAsAssignToCounterpart() {
JsBinaryOperator operator = getCounterpartOperator();
JsExpression oldValue = accessTranslator.translateAsGet();
if (!rightExpressionTrivial) {
oldValue = context().defineTemporary(oldValue);
}
JsBinaryOperation counterpartOperation = new JsBinaryOperation(operator, oldValue, right);
context().addStatementsToCurrentBlockFrom(rightBlock);
return accessTranslator.translateAsSet(counterpartOperation);
}
@NotNull
private JsBinaryOperator getCounterpartOperator() {
KtToken assignmentOperationToken = getOperationToken(expression);
assert assignmentOperationToken instanceof KtSingleValueToken;
assert OperatorConventions.ASSIGNMENT_OPERATIONS.containsKey(assignmentOperationToken);
KtToken counterpartToken = OperatorConventions.ASSIGNMENT_OPERATION_COUNTERPARTS.get(assignmentOperationToken);
assert OperatorTable.hasCorrespondingBinaryOperator(counterpartToken) :
"Unsupported token encountered: " + counterpartToken.toString();
return OperatorTable.getBinaryOperator(counterpartToken);
}
@NotNull
private JsExpression translateAsPlainAssignmentOperation() {
context().addStatementsToCurrentBlockFrom(rightBlock);
JsBinaryOperator operator = getAssignmentOperator();
return new JsBinaryOperation(operator, accessTranslator.translateAsGet(), right);
}
@NotNull
private JsBinaryOperator getAssignmentOperator() {
KtToken token = getOperationToken(expression);
assert token instanceof KtSingleValueToken;
assert OperatorConventions.ASSIGNMENT_OPERATIONS.containsKey(token);
assert OperatorTable.hasCorrespondingBinaryOperator(token) :
"Unsupported token encountered: " + token.toString();
return OperatorTable.getBinaryOperator(token);
}
@NotNull
private JsExpression translateAsPlainAssignment() {
context().addStatementsToCurrentBlockFrom(rightBlock);
return accessTranslator.translateAsSet(right);
}
}