Struct DagPosition 

#[repr(C)]
pub struct DagPosition {
    pub depth: u32,
    pub lane: u32,
    pub sequence: u32,
}

Position of an event in the DAG.

The DAG position uniquely identifies where an event sits in the event graph.

• depth: Distance from the root event (0 = root)
• lane: Parallel track for fan-out scenarios
• sequence: Monotonic counter within a lane

Fields

depth: u32

Distance from the root event (0 = root event)

lane: u32

Parallel track number for fan-out (0 = main track)

sequence: u32

Monotonic sequence number within the lane

Implementations

impl DagPosition

pub const fn new(depth: u32, lane: u32, sequence: u32) -> Self

Create a new DAG position.

pub const fn root() -> Self

Create the root position.

pub const fn child(&self, sequence: u32) -> Self

Create a child position on the same lane.

pub const fn fork(&self, new_lane: u32, sequence: u32) -> Self

Create a position on a new lane (fork).

pub const fn is_ancestor_of(&self, other: &Self) -> bool

Check if this position is a potential ancestor of another based on depth and lane.

Returns true if self is at a shallower depth on the same lane as other. Note: this is a necessary but not sufficient condition for true ancestry — it does not verify sequence continuity along the parent chain.

pub const fn is_root(&self) -> bool

Check if this is the root position.

Trait Implementations

impl Clone for DagPosition

fn clone(&self) -> DagPosition

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl ComposeSchema for DagPosition

fn compose(generics: Vec<RefOr<Schema>>) -> RefOr<Schema>

impl Debug for DagPosition

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

Formats the value using the given formatter.

impl Default for DagPosition

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for DagPosition

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for DagPosition

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

Formats the value using the given formatter.

impl Hash for DagPosition

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for DagPosition

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for DagPosition

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl ToSchema for DagPosition

fn name() -> Cow<'static, str>

Return name of the schema.

fn schemas(schemas: &mut Vec<(String, RefOr<Schema>)>)

Implement reference [utoipa::openapi::schema::Schema]s for this type.

impl Copy for DagPosition

impl Eq for DagPosition

impl StructuralPartialEq for DagPosition