/*
 * Copyright © 2018 Atomist, Inc.
 *
 * 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.
 */

import { PredicateMapping } from "../PredicateMapping";

/**
 * Classification of expected PredicateMapping cost
 */
export enum ExpectedPredicateMappingCost {
    cheap = "cheap",
    expensive = "expensive",
    unknown = "unknown",
}

/**
 * Function that can classify PredicateMappings by expected cost to evaluate
 */
export type PredicateMappingCostAnalyzer<F> = (pm: PredicateMapping<F>) => ExpectedPredicateMappingCost;