org.jetbrains.kotlin.types.DisjointKeysUnionTypeSubstitution.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.types
import org.jetbrains.kotlin.descriptors.annotations.Annotations
class DisjointKeysUnionTypeSubstitution private constructor(
private val first: TypeSubstitution,
private val second: TypeSubstitution
) : TypeSubstitution() {
companion object {
@JvmStatic fun create(first: TypeSubstitution, second: TypeSubstitution): TypeSubstitution {
if (first.isEmpty()) return second
if (second.isEmpty()) return first
return DisjointKeysUnionTypeSubstitution(first, second)
}
}
override fun get(key: KotlinType) = first[key] ?: second[key]
override fun prepareTopLevelType(topLevelType: KotlinType, position: Variance) =
second.prepareTopLevelType(first.prepareTopLevelType(topLevelType, position), position)
override fun isEmpty() = false
override fun approximateCapturedTypes() = first.approximateCapturedTypes() || second.approximateCapturedTypes()
override fun approximateContravariantCapturedTypes() = first.approximateContravariantCapturedTypes() || second.approximateContravariantCapturedTypes()
override fun filterAnnotations(annotations: Annotations) = second.filterAnnotations(first.filterAnnotations(annotations))
}