Struct ScalarCursor 

pub struct ScalarCursor {
    pub obj_id: Option<ObjId>,
}

Cursor for scalar/primitive types that don’t have nested structure.

The ObjId passed to diff() and refresh() is the ObjId of the scalar value itself (returned by doc.get()). When a scalar value is modified, it gets a new ObjId, so comparing cached vs current ObjIds detects changes.

Fields

obj_id: Option<ObjId>

The cached ObjId for this scalar value.

Trait Implementations

impl Clone for ScalarCursor

fn clone(&self) -> ScalarCursor

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ScalarCursor

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ScalarCursor

fn default() -> ScalarCursor

Returns the “default value” for a type.

impl FieldCursor for ScalarCursor

type Changes = PrimitiveChanged

The associated change report type.

fn diff<D: ReadDoc>(&self, _doc: &D, obj: &ObjId) -> Result<Self::Changes>

Compares cached ObjIds against the document to detect changes.

fn refresh<D: ReadDoc>(&mut self, _doc: &D, obj: &ObjId) -> Result<()>

Refreshes the cached ObjIds from the document.

fn has_changes<D: ReadDoc>(&self, doc: &D, obj: &ObjId) -> Result<bool>

Checks if any cached ObjIds differ from the document.