org.jetbrains.kotlin.builtins.functions.BuiltInFictitiousFunctionClassFactory.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.builtins.functions
import org.jetbrains.kotlin.builtins.BuiltInsPackageFragment
import org.jetbrains.kotlin.builtins.FunctionInterfacePackageFragment
import org.jetbrains.kotlin.descriptors.ClassDescriptor
import org.jetbrains.kotlin.descriptors.ModuleDescriptor
import org.jetbrains.kotlin.descriptors.deserialization.ClassDescriptorFactory
import org.jetbrains.kotlin.name.ClassId
import org.jetbrains.kotlin.name.FqName
import org.jetbrains.kotlin.name.Name
import org.jetbrains.kotlin.storage.StorageManager
/**
* Produces descriptors representing the fictitious classes for function types, such as kotlin.Function1 or kotlin.reflect.KFunction2.
*/
class BuiltInFictitiousFunctionClassFactory(
private val storageManager: StorageManager,
private val module: ModuleDescriptor
) : ClassDescriptorFactory {
override fun shouldCreateClass(packageFqName: FqName, name: Name): Boolean {
val string = name.asString()
return (string.startsWith("Function") || string.startsWith("KFunction") ||
string.startsWith("SuspendFunction") || string.startsWith("KSuspendFunction")) // an optimization
&& FunctionClassKind.parseClassName(string, packageFqName) != null
}
override fun createClass(classId: ClassId): ClassDescriptor? {
if (classId.isLocal || classId.isNestedClass) return null
val className = classId.relativeClassName.asString()
if ("Function" !in className) return null // An optimization
val packageFqName = classId.packageFqName
val (kind, arity) = FunctionClassKind.parseClassName(className, packageFqName) ?: return null
val builtInsFragments = module.getPackage(packageFqName).fragments.filterIsInstance()
// JS IR backend uses separate FunctionInterfacePackageFragment for function interfaces
val containingPackageFragment =
builtInsFragments.filterIsInstance().firstOrNull() ?: builtInsFragments.first()
return FunctionClassDescriptor(storageManager, containingPackageFragment, kind, arity)
}
override fun getAllContributedClassesIfPossible(packageFqName: FqName): Collection {
// We don't want to return 256 classes here since it would cause them to appear in every import list of every file
// and likely slow down compilation very much
return emptySet()
}
}