option.go

package raccoon

// Option type is a container for a value
// Option may or may not contain value
type Option[T any] struct {
	val   T
	empty bool
}

// Return a copy of the options type
// Calling Value on an empty option will panic
func (o *Option[T]) Value() T {
	if o.IsEmpty() {
		panic("cannot return value for empty Option")
	}
	return o.val
}

// Return true if Option does not contain a value
func (o *Option[T]) IsEmpty() bool {
	return o.empty
}

// Build an Option with val as its inner value
func Some[T any](val T) Option[T] {
	return Option[T]{
		val:   val,
		empty: false,
	}
}

// Build an empty Option
func None[T any]() Option[T] {
	return Option[T]{
		empty: true,
	}
}