Struct SchemaVersion 

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

Schema-format version stamped on a persisted record (e.g. a crate::apply::Checkpoint or a crate::index::Plan).

Strict-equality compatibility: a persisted record with a SchemaVersion that does not equal the build’s CURRENT_SCHEMA_VERSION is refused rather than silently re-interpreted. Use SchemaVersion::compatible_with to perform the comparison.

Implementations

impl SchemaVersion

pub const fn new(v: u32) -> Self

Construct a SchemaVersion from a raw u32.

pub const fn get(self) -> u32

Return the wrapped u32.

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

Returns true if self is compatible with other.

Compatibility is strict equality: persisted records carrying a different version cannot be silently consumed against the current schema, because the layout may have shifted in either direction.

pub const fn wrapping_add(self, rhs: u32) -> Self

Return a SchemaVersion whose inner u32 is self.get().wrapping_add(rhs). Intended for tests that need to fabricate a “version off by one” value.

pub const fn wrapping_sub(self, rhs: u32) -> Self

Return a SchemaVersion whose inner u32 is self.get().wrapping_sub(rhs). Intended for tests that need to fabricate a “version off by one” value.

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 Debug for SchemaVersion

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SchemaVersion

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for SchemaVersion

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

Formats the value using the given formatter.

impl From<SchemaVersion> for u32

fn from(v: SchemaVersion) -> Self

Converts to this type from the input type.

impl From<u32> for SchemaVersion

fn from(v: u32) -> Self

Converts to this type from the input type.

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

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 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 Serialize for SchemaVersion

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for SchemaVersion

impl Eq for SchemaVersion

impl StructuralPartialEq for SchemaVersion