Enum BreakingChange 

#[non_exhaustive]
pub enum BreakingChange {
    RemovedVertex {
        vertex_id: String,
    },
    RemovedEdge {
        src: String,
        tgt: String,
        kind: String,
        name: Option<String>,
    },
    RequiredEdgeAdded {
        vertex_id: String,
        src: String,
        tgt: String,
        kind: String,
        name: Option<String>,
    },
    RequiredEdgeRemoved {
        vertex_id: String,
        src: String,
        tgt: String,
        kind: String,
        name: Option<String>,
    },
    KindChanged {
        vertex_id: String,
        old_kind: String,
        new_kind: String,
    },
    ConstraintTightened {
        vertex_id: String,
        sort: String,
        old_value: String,
        new_value: String,
    },
    ConstraintAdded {
        vertex_id: String,
        sort: String,
        value: String,
    },
    AddedVariant {
        vertex_id: String,
        variant_id: String,
    },
    RemovedVariant {
        vertex_id: String,
        variant_id: String,
    },
    ModifiedVariant {
        vertex_id: String,
        variant_id: String,
        old_tag: Option<String>,
        new_tag: Option<String>,
    },
    OrderToUnordered {
        edge: Edge,
    },
    UnorderedToOrdered {
        edge: Edge,
    },
    RecursionPointAdded {
        mu_id: String,
    },
    RecursionBroken {
        mu_id: String,
    },
    RecursionPointModified {
        mu_id: String,
        old_target: String,
        new_target: String,
    },
    LinearityTightened {
        edge: Edge,
        old_mode: UsageMode,
        new_mode: UsageMode,
    },
    NsidChanged {
        vertex_id: String,
        old_nsid: String,
        new_nsid: String,
    },
    NsidRemoved {
        vertex_id: String,
    },
    HyperEdgeRemoved {
        id: String,
    },
    HyperEdgeModified {
        id: String,
    },
    SpanRemoved {
        id: String,
    },
    SpanModified {
        id: String,
    },
    NominalFlipped {
        vertex_id: String,
        old_value: bool,
        new_value: bool,
    },
    EnrichmentRemoved {
        category: String,
        key: String,
    },
    EnrichmentModified {
        category: String,
        key: String,
    },
    CoercionClassDowngraded {
        from_kind: String,
        to_kind: String,
        old_class: String,
        new_class: String,
    },
    CoercionRemoved {
        from_kind: String,
        to_kind: String,
    },
    RenamedVertex {
        old_id: String,
        new_id: String,
    },
    UnclassifiedChange {
        category: String,
        count: usize,
    },
}

A change that breaks backward compatibility.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

RemovedVertex

A vertex was removed from the schema.

Fields

vertex_id: String

The removed vertex ID.

RemovedEdge

An edge was removed from the schema.

Fields

src: String

Source vertex ID.

tgt: String

Target vertex ID.

kind: String

Edge kind.

name: Option<String>

Edge name, if present.

RequiredEdgeAdded

A required edge was added on an existing vertex (existing data lacking the edge becomes invalid).

Fields

vertex_id: String

The vertex the requirement is attached to.

src: String

Source vertex ID.

tgt: String

Target vertex ID.

kind: String

Edge kind.

name: Option<String>

Edge name, if present.

RequiredEdgeRemoved

A required edge was removed on an existing vertex (a guarantee consumers relied on is gone).

Fields

vertex_id: String

The vertex the requirement was attached to.

src: String

Source vertex ID.

tgt: String

Target vertex ID.

kind: String

Edge kind.

name: Option<String>

Edge name, if present.

KindChanged

A vertex’s kind changed.

Fields

vertex_id: String

The vertex ID.

old_kind: String

The old kind.

new_kind: String

The new kind.

ConstraintTightened

A constraint was tightened (made more restrictive).

Fields

vertex_id: String

The vertex ID.

sort: String

The constraint sort.

old_value: String

The old value.

new_value: String

The new value.

ConstraintAdded

A new constraint was added to an existing vertex.

Fields

vertex_id: String

The vertex ID.

sort: String

The constraint sort.

value: String

The constraint value.

AddedVariant

A coproduct variant was added. Openness is not encoded in the protocol, so this defaults to the closed-union reading where existing consumers reject the unknown variant.

Fields

vertex_id: String

The parent coproduct vertex ID.

variant_id: String

The added variant ID.

RemovedVariant

A coproduct variant was removed (type error for existing data).

Fields

vertex_id: String

The parent coproduct vertex ID.

variant_id: String

The removed variant ID.

ModifiedVariant

A coproduct variant’s tag changed.

Fields

vertex_id: String

The parent coproduct vertex ID.

variant_id: String

The variant ID.

old_tag: Option<String>

The old tag.

new_tag: Option<String>

The new tag.

OrderToUnordered

An ordered collection became unordered (lossy).

Fields

edge: Edge

The edge that lost its ordering.

UnorderedToOrdered

An unordered collection became ordered (consumers relying on set semantics can break).

Fields

edge: Edge

The edge that gained an ordering.

RecursionPointAdded

A recursion point was added (the type became recursive).

Fields

mu_id: String

The added fixpoint marker ID.

RecursionBroken

A recursion point was removed (breaks recursive types).

Fields

mu_id: String

The removed fixpoint marker ID.

RecursionPointModified

A recursion point’s target vertex changed.

Fields

mu_id: String

The fixpoint marker ID.

old_target: String

The old target vertex.

new_target: String

The new target vertex.

LinearityTightened

An edge’s usage mode was tightened (e.g., structural → linear).

Fields

edge: Edge

The affected edge.

old_mode: UsageMode

The old usage mode.

new_mode: UsageMode

The new usage mode.

NsidChanged

A vertex’s NSID mapping changed.

Fields

vertex_id: String

The vertex ID.

old_nsid: String

The old NSID.

new_nsid: String

The new NSID.

NsidRemoved

A vertex’s NSID mapping was removed.

Fields

vertex_id: String

The vertex ID.

HyperEdgeRemoved

A hyper-edge was removed from the schema.

Fields

id: String

The removed hyper-edge ID.

HyperEdgeModified

A hyper-edge’s kind, signature, or parent label changed.

Fields

id: String

The hyper-edge ID.

SpanRemoved

A span was removed from the schema.

Fields

id: String

The removed span ID.

SpanModified

A span’s left or right vertex changed.

Fields

id: String

The span ID.

NominalFlipped

A vertex’s nominal-identity flag flipped in either direction.

Fields

vertex_id: String

The vertex ID.

old_value: bool

The old nominal flag.

new_value: bool

The new nominal flag.

EnrichmentRemoved

An enrichment (coercion, merger, default, or policy) was removed.

Fields

category: String

The enrichment category ("coercion", "merger", "default", or "policy").

key: String

The enrichment key (vertex ID, sort, or "from -> to" pair).

EnrichmentModified

An enrichment (coercion, merger, default, or policy) was modified.

Fields

category: String

The enrichment category.

key: String

The enrichment key.

CoercionClassDowngraded

A coercion’s round-trip class was downgraded (e.g., Iso to Retraction).

Fields

from_kind: String

The source kind of the coercion.

to_kind: String

The target kind of the coercion.

old_class: String

The old coercion class.

new_class: String

The new coercion class.

CoercionRemoved

A coercion was removed from the schema.

Diff-level coercion removals are reported as EnrichmentRemoved; this richer variant is retained for API stability.

Fields

from_kind: String

The source kind of the removed coercion.

to_kind: String

The target kind of the removed coercion.

RenamedVertex

A vertex was renamed (old ID to new ID), detected from a removed/added pair.

Fields

old_id: String

The old vertex ID.

new_id: String

The new vertex ID.

UnclassifiedChange

A residual, non-empty diff sub-case with no dedicated variant.

This is the conservative fail-closed bucket: any change routed here forces compatible == false rather than being dropped.

Fields

category: String

A short label for the sub-case.

count: usize

The number of changes rolled into this bucket.

Trait Implementations

impl Clone for BreakingChange

fn clone(&self) -> BreakingChange

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BreakingChange

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for BreakingChange

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for BreakingChange

impl PartialEq for BreakingChange

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for BreakingChange

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for BreakingChange