Hands-On System Programming with Go

Invoking a function

While the type of the function shows information about it, in order to call a function, we need to use its value.

We will pass the function a list of argument values and get back the ones returned by the function call:

func main() {    for _, f := range []interface{}{Foo, Bar, Baz, Qux} {        v, t := reflect.ValueOf(f), reflect.TypeOf(f)        name := runtime.FuncForPC(v.Pointer()).Name()        in := make([]reflect.Value, t.NumIn())        for i := range in {            switch a := t.In(i); a.Kind() {            case reflect.Int:                in[i] = reflect.ValueOf(42)            case reflect.String:                in[i] = reflect.ValueOf("42")            case reflect.Slice:                switch a.Elem().Kind() {                case reflect.Int:                    in[i] = reflect.ValueOf(21)                case reflect.String:                    in[i] = reflect.ValueOf("21")                }            }        } out := v.Call(in) ...