73 lines
2.7 KiB
Go
73 lines
2.7 KiB
Go
// 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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import "math"
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// MathOperators is default set for math expressions
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var MathOperators = []*Operator{
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{Op: "+", Assoc: LeftAssoc, Priority: 10, Fn: func(a float64, b float64) (float64, error) { return a + b, nil }},
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{Op: "-", Assoc: LeftAssoc, Priority: 10, Fn: func(a float64, b float64) (float64, error) { return a - b, nil }},
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{Op: "*", Assoc: LeftAssoc, Priority: 20, Fn: func(a float64, b float64) (float64, error) { return a * b, nil }},
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{Op: "/", Assoc: LeftAssoc, Priority: 20, Fn: func(a float64, b float64) (float64, error) { return a / b, nil }},
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{Op: "^", Assoc: RightAssoc, Priority: 30, Fn: func(a, b float64) (float64, error) { return math.Pow(a, b), nil }},
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}
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// LogicOperators is default set for logic expressions
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var LogicOperators = []*Operator{
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{Op: "==", Assoc: LeftAssoc, Priority: 0, Fn: func(a float64, b float64) (float64, error) {
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if a == b {
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return 1, nil
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}
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return 0, nil
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}},
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{Op: "!=", Assoc: LeftAssoc, Priority: 0, Fn: func(a float64, b float64) (float64, error) {
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if a != b {
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return 1, nil
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}
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return 0, nil
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}},
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{Op: ">", Assoc: LeftAssoc, Priority: 0, Fn: func(a float64, b float64) (float64, error) {
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if a > b {
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return 1, nil
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}
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return 0, nil
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}},
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{Op: "<", Assoc: LeftAssoc, Priority: 0, Fn: func(a float64, b float64) (float64, error) {
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if a < b {
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return 1, nil
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}
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return 0, nil
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}},
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{Op: ">=", Assoc: LeftAssoc, Priority: 0, Fn: func(a float64, b float64) (float64, error) {
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if a >= b {
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return 1, nil
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}
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return 0, nil
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}},
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{Op: "<=", Assoc: LeftAssoc, Priority: 0, Fn: func(a float64, b float64) (float64, error) {
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if a <= b {
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return 1, nil
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}
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return 0, nil
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}},
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}
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