45 lines
1.7 KiB
Go
45 lines
1.7 KiB
Go
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// Copyright (c) 2020 Alexander Kiryukhin <a.kiryukhin@mail.ru>
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package executor
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// Operator implements math operators
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type Operator struct {
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Op string
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Priority int
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Assoc Assoc
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Fn func(a float64, b float64) (float64, error)
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}
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// NewOperator returns new instance of Operator
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func NewOperator(op string, priority int, assoc Assoc, fn func(a float64, b float64) (float64, error)) *Operator {
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return &Operator{Op: op, Priority: priority, Assoc: assoc, Fn: fn}
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}
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// Assoc right or left association of operator
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type Assoc int
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// LeftAssoc for left associated operators
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// RighAssoc for right associated operators
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const (
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LeftAssoc Assoc = iota
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RightAssoc
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)
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