/*
* 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.functors
import org.jetbrains.kotlin.contracts.model.structure.ESReturns
import org.jetbrains.kotlin.contracts.model.structure.ESConstant
import org.jetbrains.kotlin.contracts.model.ConditionalEffect
import org.jetbrains.kotlin.contracts.model.ESEffect
import org.jetbrains.kotlin.contracts.model.Computation
/**
* Unary functor that has sequential semantics, i.e. it won't apply to
* computations that can't be guaranteed to be finished.
*
* It provides [applyToFinishingClauses] method for successors, which is guaranteed to
* be called only on clauses that haven't failed before reaching functor transformation.
*/
abstract class AbstractUnaryFunctor : AbstractReducingFunctor() {
override fun doInvocation(arguments: List<Computation>): List<ESEffect> {
assert(arguments.size == 1, { "Wrong size of arguments list for Unary operator: expected 1, got ${arguments.size}" })
return invokeWithArguments(arguments[0])
}
fun invokeWithArguments(arg: Computation): List<ESEffect> {
val returning = mutableListOf<ConditionalEffect>()
val rest = mutableListOf<ESEffect>()
arg.effects.forEach { if (it !is ConditionalEffect || it.simpleEffect !is ESReturns || it.simpleEffect.value == ESConstant.WILDCARD) rest += it else returning += it }
val evaluatedByFunctor = invokeWithReturningEffects(returning)
return rest + evaluatedByFunctor
}
protected abstract fun invokeWithReturningEffects(list: List<ConditionalEffect>): List<ConditionalEffect>
}