Enum RelationSourceFragment 

pub enum RelationSourceFragment {
    Direct {
        fields: Vec<FieldSourceKey>,
    },
    Nested {
        root: FieldSourceKey,
        steps: Vec<RelationPathStepFragment>,
    },
}

Current source program for one relation edge.

Variants

Direct

Ordered entity-root fields for the direct relation fast path.

Fields

fields: Vec<FieldSourceKey>

Nested

One deterministic path from an entity-root field to scalar targets.

Fields

root: FieldSourceKey

Entity-root field that owns the finite nested value.

steps: Vec<RelationPathStepFragment>

Complete ordered traversal program below root.

Implementations

impl RelationSourceFragment

pub const fn direct(fields: Vec<FieldSourceKey>) -> RelationSourceFragment

Construct a direct relation source from ordered root fields.

pub fn root_fields(&self) -> impl Iterator<Item = &FieldSourceKey>

Borrow every entity-root field owned by this relation source.

Trait Implementations

impl Clone for RelationSourceFragment

fn clone(&self) -> RelationSourceFragment

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RelationSourceFragment

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

Formats the value using the given formatter.

impl Eq for RelationSourceFragment

impl PartialEq for RelationSourceFragment

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for RelationSourceFragment