gistfile1.go

package main

import "log"
import "reflect"

func Apply(f interface{}, args []interface{}) interface{}{
        fv := reflect.ValueOf(f)
        if fv.Kind() != reflect.Func {
                log.Fatal("error")
        }
        l := make([]reflect.Value, len(args))
        for i, v := range args {
                l[i] = reflect.ValueOf(v)
        }
        fv.Call(l)
}

func Eval(form interface{}) interface{} {
        if list, t := form.([]interface{}); t {
                log.Printf("form.([]interface{}) %v", list)
                Apply(list[0], list[1:])
        } else if str, t := form.(string); t {
                log.Printf("form.(string) %v", str)
        } else if i, t := form.(int); t {
                log.Printf("form.(int) %v", i)
        }
}

func main() {
        Eval("foo")
        Eval(123)
        Eval([]interface{}{
                func(s string){
                        log.Printf("%v", s)
                },
                "world"})
}