Enum WrittenVersion 

#[non_exhaustive]
pub enum WrittenVersion {
    Named(String),
    Unnamed,
    Malformed,
}

The version a write left at its origin, which is the data a write accessed (Annex II 3.2), as the origin’s answer named it.

The recording system holds the version id to the OBJECT_VERSION_ID form before it is recorded, so a value the answer carried in its place, whatever it holds, never reaches the record.

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.

Named(String)

The answer named this OBJECT_VERSION_ID.

Unnamed

The answer named no version, so the record cannot tell which one the write left.

Malformed

The answer named a version that is no OBJECT_VERSION_ID, so the record cannot tell which one the write left.

Implementations

impl WrittenVersion

pub fn named(&self) -> Option<&str>

The version id, when the answer named one.

pub fn unread(&self) -> Option<&'static str>

Why the record cannot tell the version, as a record writes it: unnamed or malformed, or None when the answer named it.

Trait Implementations

impl Clone for WrittenVersion

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WrittenVersion

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

Formats the value using the given formatter.

impl Eq for WrittenVersion

impl PartialEq for WrittenVersion

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for WrittenVersion