[Go][Reflect] AssignableTo & ConveribleTo

main.go

package main

import (
	"fmt"
	"reflect"
)

func EnforcePtr(obj interface{}) (reflect.Value, error) {
	v := reflect.ValueOf(obj)
	if v.Kind() != reflect.Ptr {
		if v.Kind() == reflect.Invalid {
			return reflect.Value{}, fmt.Errorf("expected pointer, but got invalid kind")
		}
		return reflect.Value{}, fmt.Errorf("expected pointer, but got %v type", v.Type())
	}
	if v.IsNil() {
		return reflect.Value{}, fmt.Errorf("expected pointer, but got nil")
	}
	return v.Elem(), nil
}

func main() {
	i := 1
	f := 0.0
	
	pi, _ := EnforcePtr(&i)
	pf, _ := EnforcePtr(&f)
	
	ti := pi.Type()
	tf := pf.Type()
	
	if ti.AssignableTo(tf) {
		pf.Set(pi)
		goto finish
	} else {
		fmt.Println("Condition I: ", ti.Name(), " can not assign to ", tf.Name())
	}
	
	if ti.ConvertibleTo(tf) {
		pf.Set(pi.Convert(tf))
		goto finish
	} else {
		fmt.Println("Condition II: ", ti.Name(), " can not assign to ", tf.Name())
	}

finish:	
	fmt.Println(i, f)
}