org.jetbrains.kotlin.resolve.ktDescriptorUtil.kt Maven / Gradle / Ivy

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/*
 * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
 * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
 */

package org.jetbrains.kotlin.resolve

import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
import org.jetbrains.kotlin.descriptors.ClassDescriptor
import org.jetbrains.kotlin.descriptors.FunctionDescriptor
import org.jetbrains.kotlin.descriptors.Modality
import org.jetbrains.kotlin.types.DeferredType
import org.jetbrains.kotlin.types.KotlinType
import org.jetbrains.kotlin.types.typeUtil.contains

fun FunctionDescriptor.isFunctionForExpectTypeFromCastFeature(): Boolean {
    val typeParameter = typeParameters.singleOrNull() ?: return false

    val returnType = returnType ?: return false
    if (returnType is DeferredType && returnType.isComputing) return false

    if (returnType.constructor != typeParameter.typeConstructor) return false

    fun KotlinType.isBadType() = contains { it.constructor == typeParameter.typeConstructor }

    if (valueParameters.any { it.type.isBadType() } || extensionReceiverParameter?.type?.isBadType() == true) return false

    return true
}


internal fun CallableMemberDescriptor.isEffectivelyFinal(ignoreEnumClassFinality: Boolean): Boolean =
    modality == Modality.FINAL ||
            containingDeclaration.let { parent ->
                (ignoreEnumClassFinality || !DescriptorUtils.isEnumClass(parent)) &&
                        parent is ClassDescriptor && parent.modality == Modality.FINAL
            }