Anko

Anko is a scriptable interpreter written in Go.

(Picture licensed under CC BY-SA 3.0, photo by Ocdp)

Usage Example - Embedded

package main
import ( 	"fmt" 	"log"
"github.com/mattn/anko/env" 	"github.com/mattn/anko/vm" )
func main() { 	e := env.NewEnv()
err := e.Define("println", fmt.Println) 	if err != nil { 		log.Fatalf("Define error: %v\n", err) 	}
script :=  println(&quot;Hello World :)&quot;) 
_, err = vm.Execute(e, nil, script) 	if err != nil { 		log.Fatalf("Execute error: %v\n", err) 	}
// output: Hello World :) }

More examples are located in the GoDoc:

https://godoc.org/github.com/mattn/anko/vm

Usage Example - Command Line

Building

go get github.com/mattn/anko
go install github.com/mattn/anko

Running an Anko script file named script.ank

./anko script.ank

Anko Script Quick Start

// declare variables
x = 1
y = x + 1
// print using outside the script defined println function println(x + y) // 3
// if else statement if x < 1 || y < 1 { 	println(x) } else if x < 1 && y < 1 { 	println(y) } else { 	println(x + y) }
// slice a = []interface{1, 2, 3} println(a) // [1 2 3] println(a[0]) // 1
// map a = map[interface]interface{"x": 1} println(a) // map[x:1] a.b = 2 a["c"] = 3 println(a["b"]) // 2 println(a.c) // 3
// struct a = make(struct { 	A int64, 	B float64 }) a.A = 4 a.B = 5.5 println(a.A) // 4 println(a.B) // 5.5
// function func a (x) { 	println(x + 1) } a(5) // 6
// defer runs a function call when the surrounding function returns, // in last-in first-out order func b () { 	defer println("world") 	defer println("hello") 	println("start") } b() // start, hello, world