.kotlin.kotlin-compiler.1.3.11.source-code.JvmTypeSpecificityComparator.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2016 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,
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* See the License for the specific language governing permissions and
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package org.jetbrains.kotlin.resolve.jvm
import org.jetbrains.kotlin.builtins.KotlinBuiltIns
import org.jetbrains.kotlin.resolve.calls.results.TypeSpecificityComparator
import org.jetbrains.kotlin.types.KotlinType
import org.jetbrains.kotlin.types.asFlexibleType
import org.jetbrains.kotlin.types.isFlexible
object JvmTypeSpecificityComparator : TypeSpecificityComparator {
override fun isDefinitelyLessSpecific(specific: KotlinType, general: KotlinType): Boolean {
if (!specific.isFlexible() || general.isFlexible()) return false
// general is inflexible
val flexibility = specific.asFlexibleType()
// For primitive types we have to take care of the case when there are two overloaded methods like
// foo(int) and foo(Integer)
// if we do not discriminate one of them, any call to foo(kotlin.Int) will result in overload resolution ambiguity
// so, for such cases, we discriminate Integer in favour of int
if (!KotlinBuiltIns.isPrimitiveType(general) || !KotlinBuiltIns.isPrimitiveType(flexibility.lowerBound)) {
return false
}
// Int? >< Int!
if (general.isMarkedNullable) return false
// Int! lessSpecific Int
return true
}
}