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32 lines
945 B
Go
32 lines
945 B
Go
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package interpreter
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import "math"
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// Coster calculates the heuristic cost incurred during evaluation.
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type Coster interface {
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Cost() (min, max int64)
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}
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// estimateCost returns the heuristic cost interval for the program.
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func estimateCost(i interface{}) (min, max int64) {
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c, ok := i.(Coster)
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if !ok {
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return 0, math.MaxInt64
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}
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return c.Cost()
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}
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