Struct ComposeReport 

pub struct ComposeReport {
    pub dropped_vertices: Vec<Name>,
    pub dropped_edges: Vec<Edge>,
    pub dropped_hyper_edges: Vec<Name>,
    pub dropped_resolver_keys: Vec<(Name, Name)>,
    pub dropped_labels: Vec<(Name, Name)>,
}

Entries discarded while composing two migrations.

compose follows partial-map semantics: a vertex, edge, hyper-edge, resolver entry, or label whose m1-image is absent from m2’s corresponding map is dropped from the composite. Silent dropping hides mis-paired compositions, so compose_with_report records every drop here for the caller to inspect.

Fields

dropped_vertices: Vec<Name>

Source vertices dropped because m2 did not map their m1-image.

dropped_edges: Vec<Edge>

Source edges dropped because m2 did not map their m1-image.

dropped_hyper_edges: Vec<Name>

Source hyper-edges dropped because m2 did not map their m1-image.

dropped_resolver_keys: Vec<(Name, Name)>

Resolver keys dropped because an endpoint or edge did not survive m2.

dropped_labels: Vec<(Name, Name)>

Label keys dropped because the governing hyper-edge did not survive m2.

Implementations

impl ComposeReport

pub fn is_empty(&self) -> bool

Returns true when no entry was dropped during composition.

pub fn to_lines(&self) -> Vec<String>

Render each dropped entry as a human-readable line.

Trait Implementations

impl Clone for ComposeReport

fn clone(&self) -> ComposeReport

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ComposeReport

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

Formats the value using the given formatter.

impl Default for ComposeReport

fn default() -> ComposeReport

Returns the “default value” for a type.

impl Eq for ComposeReport

impl PartialEq for ComposeReport

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ComposeReport