org.jetbrains.jet.lang.cfg.pseudocode.TypePredicate.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2014 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.jet.lang.cfg.pseudocode
import org.jetbrains.jet.lang.types.JetType
import org.jetbrains.jet.lang.types.checker.JetTypeChecker
import org.jetbrains.jet.renderer.DescriptorRenderer
import com.intellij.util.SmartFMap
import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns
import org.jetbrains.jet.lang.types.TypeUtils
public trait TypePredicate: (JetType) -> Boolean {
[suppress("PARAMETER_NAME_CHANGED_ON_OVERRIDE")]
override fun invoke(typeToCheck: JetType): Boolean
}
public data class SingleType(val targetType: JetType): TypePredicate {
override fun invoke(typeToCheck: JetType): Boolean = JetTypeChecker.DEFAULT.equalTypes(typeToCheck, targetType)
override fun toString(): String = targetType.render()
}
public data class AllSubtypes(val upperBound: JetType): TypePredicate {
override fun invoke(typeToCheck: JetType): Boolean = JetTypeChecker.DEFAULT.isSubtypeOf(typeToCheck, upperBound)
override fun toString(): String = "{<: ${upperBound.render()}}"
}
public data class ForAllTypes(val typeSets: List): TypePredicate {
override fun invoke(typeToCheck: JetType): Boolean = typeSets.all { it(typeToCheck) }
override fun toString(): String = "AND{${typeSets.joinToString(", ")}}"
}
public data class ForSomeType(val typeSets: List): TypePredicate {
override fun invoke(typeToCheck: JetType): Boolean = typeSets.any { it(typeToCheck) }
override fun toString(): String = "OR{${typeSets.joinToString(", ")}}"
}
public object AllTypes : TypePredicate {
override fun invoke(typeToCheck: JetType): 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 JetType.getSubtypesPredicate(): TypePredicate {
return when {
KotlinBuiltIns.getInstance().isAnyOrNullableAny(this) && isNullable() -> AllTypes
TypeUtils.canHaveSubtypes(JetTypeChecker.DEFAULT, this) -> AllSubtypes(this)
else -> SingleType(this)
}
}
private fun JetType.render(): String = DescriptorRenderer.SHORT_NAMES_IN_TYPES.renderType(this)
public fun TypePredicate.expectedTypeFor(keys: Iterable): Map =
keys.fold(SmartFMap.emptyMap()) { (map, key) -> map.plus(key, this) }