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