Struct SchemaVersion 

pub struct SchemaVersion(/* private fields */);

Validated schema version — the wire-format-sized sibling of the kernel’s mnesis::Version.

Invariant: nonzero, fits in u32 (the wire format’s schema-version field).

The kernel’s Version is NonZeroU64 because aggregate streams can in principle be unboundedly long; SchemaVersion is NonZeroU32 because the wire format chose that width. Same invariant, different width — explicit total conversion to Version is provided for the upcaster path.

Implementations

impl SchemaVersion

pub const INITIAL: Self

The initial schema version (1).

pub const fn new(value: NonZeroU32) -> Self

Construct from a NonZeroU32. Infallible.

pub fn from_u32(value: u32) -> Result<Self, ValueError>

Construct from a raw u32, validating the nonzero invariant.

Errors

Returns ValueError::SchemaVersionZero if value == 0.

pub const fn get(self) -> u32

The inner u32 value (always > 0).

Trait Implementations

impl Clone for SchemaVersion

fn clone(&self) -> SchemaVersion

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SchemaVersion

impl Debug for SchemaVersion

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

Formats the value using the given formatter.

impl Eq for SchemaVersion

impl From<SchemaVersion> for Version

fn from(sv: SchemaVersion) -> Self

Widen to the kernel’s Version (NonZeroU64). Total — NonZeroU32 always fits in NonZeroU64.

impl Hash for SchemaVersion

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 Ord for SchemaVersion

fn cmp(&self, other: &SchemaVersion) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for SchemaVersion

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for SchemaVersion

fn partial_cmp(&self, other: &SchemaVersion) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for SchemaVersion