Avoid Null pointer issues in go

README.md

used a interface called Option[T any] which helps in defining the types

main.go

package main

type Option[T any] struct {
	valid bool
	value T
}

func Some[T any](value T) Option[T] {
	return Option[T]{
		valid: true,
		value: value,
	}
}

func None[T any]() Option[T] {
	return Option[T]{}
}

func (m Option[T]) IsSome() bool {
	return m.valid
}

func (m Option[T]) IsNone() bool {
	return !m.valid
}

func (m Option[T]) Unwrap() T {
	if m.IsNone() {
		panic("Unwrap called on None")
	}
	return m.value
}

func (m Option[T]) UnwrapOr(defaultValue T) T {
	if m.IsNone() {
		return defaultValue
	}
	return m.value
}

func Something(x string) Option[string] {
	if x == "" {
		return None[string]()
	}
	return Some(x)
}

func main() {
	switch Something("Hello") {
	case Some("Hello"):
		println("got val:", Something("Hello").Unwrap())
	case None[string]():
		println("Handled")
	}
}