Attempting to do optional type stuff in Go2 and doing a terrible job at it

optional.go2

package main

import (
	"fmt"
)

type Optional(type T) struct {
	p *T
}

func (o Optional(T)) IsSome() bool {
	return o.p != nil
}

func (o Optional(T)) IsNone() bool {
	return o.p == nil
}

func (o Optional(T)) Or(v T) T {
	if o.IsNone() {
		return v
	}
	return *o.p
}

func (o Optional(T)) Val() T {
	var zero T
	return o.Or(zero)
}

/* Broken ?
func (o Optional(T)) Map(f func(T) Optional(T)) Optional(T) {
	if o.p == nil {
		var zero Optional(T)
		return zero
	}
	return f(*o.p)
}
*/


func Some(type T) (v T) Optional(T) {
	return Optional(T) { &v }
}


func main() {
	iopt := Some(123)
	none := Optional(int){}
	
	fmt.Println(none.IsNone(), none.IsSome(), none.Val(), none.Or(1))
	fmt.Println(iopt.IsNone(), iopt.IsSome(), iopt.Val(), iopt.Or(1))
}