method

Change.Replacement

Replacement returns the replacement value and whether replacement is asked.

Returns

The declared result.

(Value[T], bool)

func (change Change[T]) Replacement() (
	Value[T],
	bool,
)

Change
Change is an explicit keep-or-replace result. Its zero value means keep. Replacing with Empty clears the callback's own logical value; it does not create an external patch command or durable scalar removal representation.
Value
Value carries an optional logical value. Its zero value is empty. For raw input, empty means omitted and Present(store.Null()) means explicit null. For typed scalars, empty is the portable empty state, not a durable absence encoding. T must follow its own ownership contract; this carrier does not deep-clone arbitrary mutable application values.