Enum ReleaseChangeKind 

pub enum ReleaseChangeKind {
    Unchanged,
    Added,
    Removed,
    LinkChanged,
    LeapOnly,
    MetadataOnly,
    BehaviorPast,
    BehaviorFuture,
    BehaviorPastAndFuture,
    BehaviourUnassessed,
}

How one identifier changed between the two releases. Exactly one kind per identifier (precedence is resolved in build_release_diff: presence → link → byte-identity → leap → behaviour).

Variants

Unchanged

Byte-for-byte identical compiled output (or an unchanged link).

Added

Present in NEW but not OLD.

Removed

Present in OLD but not NEW.

LinkChanged

The identifier’s link status or target changed (zone↔link flip, or retargeted link).

LeapOnly

Only the leap-second table (leapcnt) differs.

MetadataOnly

Bytes differ but zdump behaviour is identical over the whole horizon (footer / version / encoding-only). Requires the oracle to assert.

BehaviorPast

Behaviour differs only in the past window (years [lo, split-1]).

BehaviorFuture

Behaviour differs only in the future window (years [split, hi]; the split year is future).

BehaviorPastAndFuture

Behaviour differs in both the past and future windows.

BehaviourUnassessed

Bytes differ but no zdump oracle was available, so behaviour was not assessed (the structural delta is still recorded). An honest “we did not check,” never “no change.”

Implementations

impl ReleaseChangeKind

pub const ALL: [ReleaseChangeKind; 10]

Every variant, in stable order — for totality tests and summary tabulation.

pub fn as_str(self) -> &'static str

Stable snake_case label used in both text and JSON.

Trait Implementations

impl Clone for ReleaseChangeKind

fn clone(&self) -> ReleaseChangeKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ReleaseChangeKind

impl Debug for ReleaseChangeKind

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

Formats the value using the given formatter.

impl Eq for ReleaseChangeKind

impl PartialEq for ReleaseChangeKind

fn eq(&self, other: &ReleaseChangeKind) -> 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 StructuralPartialEq for ReleaseChangeKind