Enum AtomPosition 

pub enum AtomPosition {
    Interior,
    TopLevel,
}

Which of upstream’s two atom transforms applies at a given position.

The two recognize different tag lists, and which one applies is a property of the field, not of the value (MongoTransform.js:655-662). That is why this is an argument to recognize_atom at lowering time rather than a choice made by the parser: the parser does not have the schema, and guessing is wrong in both directions. Guessing top-level makes a GeoPoint compared against an Array field match a row upstream does not return, because the extra key upstream would have compared is discarded; guessing interior makes a GeoPoint compared against a GeoPoint field fail to match a row upstream does return, for the mirror reason.

Variants

Interior

transformInteriorAtom (MongoTransform.js:566-584): Pointer, Date and Bytes only.

GeoPoint, File, Polygon and Relation are deliberately absent. Upstream leaves them as plain objects here, so they are compared whole, extra keys included. Its fourth arm is $regex, which is not a __type and is handled by the lowering.

TopLevel

transformTopLevelAtom (MongoTransform.js:594-652): Pointer, Date, Bytes, GeoPoint, Polygon and File.

Six, not seven. Relation has no arm and no coder, so at the top level it is not an atom at all and the caller refuses it. “Every Parse type” is the summary that reads right and is wrong by one, and the one it is wrong by is reachable: {"field": {"__type": "Relation"}} answers 107 upstream.

Trait Implementations

impl Clone for AtomPosition

fn clone(&self) -> AtomPosition

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for AtomPosition

impl Debug for AtomPosition

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

Formats the value using the given formatter.

impl Eq for AtomPosition

impl PartialEq for AtomPosition

fn eq(&self, other: &AtomPosition) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for AtomPosition