package main

type NumMutator struct {
	Op    NumOperator
	Var   bool
	Value int
}

type NumOperator string

const (
	NumOperatorAdd NumOperator = "+"
	NumOperatorSub NumOperator = "-"
	NumOperatorMul NumOperator = "*"
	NumOperatorDiv NumOperator = "/"
)

func NewNumOperatorFromString(str string) NumOperator {
	switch str {
	case "+":
		return NumOperatorAdd
	case "-":
		return NumOperatorSub
	case "*":
		return NumOperatorMul
	case "/":
		return NumOperatorDiv
	default:
		panic("invalid number operator: " + str)
	}
}