org.jetbrains.kotlin.contracts.model.ESEffect.kt Maven / Gradle / Ivy
/*
* Copyright 2010-2017 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.contracts.model
sealed class ESEffect {
/**
* Returns:
* - true, when presence of `this`-effect necessary implies presence of `other`-effect
* - false, when presence of `this`-effect necessary implies absence of `other`-effect
* - null, when presence of `this`-effect doesn't implies neither presence nor absence of `other`-effect
*/
abstract fun isImplies(other: ESEffect): Boolean?
}
/**
* Abstraction of some side-effect of a computation.
*
* SimpleEffect alone means that this effect will definitely be fired.
*/
abstract class SimpleEffect : ESEffect()
/**
* Effect with condition attached to it.
*
* Has the same semantics as [org.jetbrains.kotlin.contracts.description.ConditionalEffectDeclaration]
*/
class ConditionalEffect(val condition: ESExpression, val simpleEffect: SimpleEffect) : ESEffect() {
// Conservatively, always return null, indicating absence of information
override fun isImplies(other: ESEffect): Boolean? = null
}