type
Resolver
Resolver calculates a root Virtual field for the response. Read other values from its context and return Present(value), Empty[T](), or an error. The value must match the declared Virtual type and remains subject to field read access.
Full signature
type Resolver[T any] func(operation.Context) (operation.Value[T], error)Related types
ContextContext describes one field callback at its current lifecycle phase. Root, Siblings and Prior are detached, immutable snapshots of field values; document metadata such as ID is available separately on Context. A callback changes its own value only through its return value.
ValueValue 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.