org.jetbrains.kotlin.js.inline.util.sideEffectUtils.kt 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.inline.util
import com.google.dart.compiler.backend.js.ast.JsLiteral.*
import com.google.dart.compiler.backend.js.ast.*
import com.google.dart.compiler.backend.js.ast.metadata.typeCheck
import org.jetbrains.kotlin.js.translate.utils.jsAstUtils.any
fun JsExpression.canHaveSideEffect(): Boolean =
any { it is JsExpression && it.canHaveOwnSideEffect() }
fun JsExpression.canHaveOwnSideEffect(): Boolean =
when (this) {
is JsValueLiteral,
is JsConditional,
is JsArrayAccess,
is JsArrayLiteral,
is JsNameRef -> false
is JsBinaryOperation -> operator.isAssignment
is JsInvocation -> !isFunctionCreatorInvocation(this)
else -> true
}
fun JsExpression.needToAlias(): Boolean =
any { it is JsExpression && it.shouldHaveOwnAlias() }
fun JsExpression.shouldHaveOwnAlias(): Boolean =
when (this) {
is JsThisRef,
is JsConditional,
is JsBinaryOperation,
is JsArrayLiteral -> true
is JsInvocation -> if (typeCheck == null) canHaveSideEffect() else false
else -> canHaveOwnSideEffect()
}