org.jetbrains.kotlin.cfg.pseudocode.TypePredicate.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.
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package org.jetbrains.kotlin.cfg.pseudocode
import com.intellij.util.SmartFMap
import org.jetbrains.kotlin.builtins.KotlinBuiltIns
import org.jetbrains.kotlin.renderer.DescriptorRenderer
import org.jetbrains.kotlin.types.KotlinType
import org.jetbrains.kotlin.types.TypeUtils
import org.jetbrains.kotlin.types.checker.KotlinTypeChecker
interface TypePredicate : (KotlinType) -> Boolean {
override fun invoke(typeToCheck: KotlinType): Boolean
}
data class SingleType(val targetType: KotlinType) : TypePredicate {
override fun invoke(typeToCheck: KotlinType): Boolean = KotlinTypeChecker.DEFAULT.equalTypes(typeToCheck, targetType)
override fun toString(): String = targetType.render()
}
data class AllSubtypes(val upperBound: KotlinType) : TypePredicate {
override fun invoke(typeToCheck: KotlinType): Boolean = KotlinTypeChecker.DEFAULT.isSubtypeOf(typeToCheck, upperBound)
override fun toString(): String = "{<: ${upperBound.render()}}"
}
data class ForAllTypes(val typeSets: List) : TypePredicate {
override fun invoke(typeToCheck: KotlinType): Boolean = typeSets.all { it(typeToCheck) }
override fun toString(): String = "AND{${typeSets.joinToString(", ")}}"
}
data class ForSomeType(val typeSets: List) : TypePredicate {
override fun invoke(typeToCheck: KotlinType): Boolean = typeSets.any { it(typeToCheck) }
override fun toString(): String = "OR{${typeSets.joinToString(", ")}}"
}
object AllTypes : TypePredicate {
override fun invoke(typeToCheck: KotlinType): Boolean = true
override fun toString(): String = "*"
}
// todo: simplify computed type predicate when possible
fun and(predicates: Collection): TypePredicate =
when (predicates.size) {
0 -> AllTypes
1 -> predicates.first()
else -> ForAllTypes(predicates.toList())
}
fun or(predicates: Collection): TypePredicate? =
when (predicates.size) {
0 -> null
1 -> predicates.first()
else -> ForSomeType(predicates.toList())
}
fun KotlinType.getSubtypesPredicate(): TypePredicate = when {
KotlinBuiltIns.isAnyOrNullableAny(this) && isMarkedNullable -> AllTypes
TypeUtils.canHaveSubtypes(KotlinTypeChecker.DEFAULT, this) -> AllSubtypes(this)
else -> SingleType(this)
}
private fun KotlinType.render(): String = DescriptorRenderer.SHORT_NAMES_IN_TYPES.renderType(this)
fun TypePredicate.expectedTypeFor(keys: Iterable): Map =
keys.fold(SmartFMap.emptyMap()) { map, key -> map.plus(key, this) }