org.jetbrains.kotlin.resolve.checkers.PrivateInlineFunctionsReturningAnonymousObjectsChecker.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2020 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.checkers
import org.jetbrains.kotlin.config.LanguageFeature
import org.jetbrains.kotlin.descriptors.*
import org.jetbrains.kotlin.diagnostics.Errors
import org.jetbrains.kotlin.psi.KtDeclaration
import org.jetbrains.kotlin.psi.KtNamedFunction
import org.jetbrains.kotlin.psi.psiUtil.isPrivate
import org.jetbrains.kotlin.resolve.DescriptorUtils
import org.jetbrains.kotlin.types.typeUtil.isAnyOrNullableAny
object PrivateInlineFunctionsReturningAnonymousObjectsChecker : DeclarationChecker {
override fun check(declaration: KtDeclaration, descriptor: DeclarationDescriptor, context: DeclarationCheckerContext) {
if (context.languageVersionSettings.supportsFeature(LanguageFeature.ForbidAnonymousReturnTypesInPrivateInlineFunctions))
return
if (descriptor !is SimpleFunctionDescriptor || !descriptor.isInline || !declaration.isPrivate() || declaration !is KtNamedFunction)
return
val returnTypeConstructor = descriptor.returnType?.constructor ?: return
if (returnTypeConstructor.supertypes.singleOrNull { it.isAnyOrNullableAny() } == null) return
val nameIdentifier = declaration.nameIdentifier ?: return
val returnTypeDeclarationDescriptor = returnTypeConstructor.declarationDescriptor ?: return
if (DescriptorUtils.isAnonymousObject(returnTypeDeclarationDescriptor)) {
context.trace.report(Errors.PRIVATE_INLINE_FUNCTIONS_RETURNING_ANONYMOUS_OBJECTS.on(nameIdentifier))
}
}
}