Enum WireSize 

pub enum WireSize {
    Fixed(u32),
    LengthPrefixed,
}

On-disk wire layout descriptor for a custom-typed column.

Tells the snapshot-driven record codec how many bytes a custom column occupies in a stored record, without needing access to the user’s concrete Encode impl. Derived from <T as Encode>::SIZE at the time the snapshot is built.

Variants

Fixed(u32)

Column occupies exactly N bytes per record (Encode::SIZE = Fixed(N)).

LengthPrefixed

Column body is preceded by a 2-byte little-endian length prefix (the convention used by Text, Blob, Json, and any custom dynamic-size type — Encode::SIZE = Dynamic).

Implementations

impl WireSize

pub const fn from_data_size(size: DataSize) -> Self

Derive the on-disk wire layout from a custom type’s DataSize.

const fn so generated code can use it inside &[ColumnDef] promotable array literals.

Trait Implementations

impl Clone for WireSize

fn clone(&self) -> WireSize

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WireSize

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for WireSize

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for WireSize

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 WireSize

fn eq(&self, other: &WireSize) -> 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 WireSize

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 WireSize

impl Eq for WireSize

impl StructuralPartialEq for WireSize