chain golang

chain.go

package main

import (
	"fmt"
)

func main() {
	chain(a).chain(b).chain(c)()
}

type chain func()

func (c chain) chain(f func()) chain {
	return func() {
		c()
		f()
	}
}

func a() {
	fmt.Println("a")
}

func b() {
	fmt.Println("b")
}

func c() {
	fmt.Println("c")
}