eval.go

package main

import "fmt"

func main() {
	//params := []string{"1", "2", "3"}

	fmt.Println(and(and(stringNode("1"), stringNode("2")), or(stringNode("3"))))
}

type node interface {
	eval([]string) bool
}

func and(ns ...node) *andNode {
	a := new(andNode)
	a.childrens = append(a.childrens, ns...)
	return a
}

func or(ns ...node) *orNode {
	a := new(orNode)
	a.childrens = append(a.childrens, ns...)
	return a
}

type andNode struct {
	childrens []node
}

func (a *andNode) eval(arr []string) bool {
	out := true
	for _, e := range a.childrens {
		out = out && e.eval(arr)
	}
	return out
}

type orNode struct {
	childrens []node
}

func (o *orNode) eval(arr []string) bool {
	var out bool
	for _, e := range o.childrens {
		out = out || e.eval(arr)
	}
	return out
}

type stringNode string

func (s stringNode) eval(arr []string) bool {
	for _, e := range arr {
		if string(s) == e {
			return true
		}
	}
	return false
}