Enum ValueDecodeSpec 

pub enum ValueDecodeSpec {
    Unit,
    Scalar(Scalar),
    String,
    Bytes,
    Record {
        shape: RecordShape,
        fields: &'static [ValueDecodeField],
    },
    Array {
        element: ValueDecodeRef,
        len: usize,
    },
    Sequence {
        element: ValueDecodeRef,
        count: Scalar,
        capacity: Option<usize>,
    },
    Map {
        key: ValueDecodeRef,
        value: ValueDecodeRef,
    },
    Option(ValueDecodeRef),
    Delegate(ValueDecodeRef),
    Enum {
        tag: Scalar,
        variants: &'static [ValueDecodeVariant],
    },
}

Wire operations supported by the first self-description API.

Variants

Unit

No bytes.

Scalar(Scalar)

One native scalar.

String

UTF-8 bytes prefixed by a codec-encoded u64 length.

Bytes

Raw bytes prefixed by a codec-encoded u64 length.

Record

Fields concatenated in wire order.

Fields

shape: RecordShape

Logical shape.

fields: &'static [ValueDecodeField]

Encoded fields in wire order.

Array

Fixed repeat, without a count prefix.

Fields

element: ValueDecodeRef

Child representation.

len: usize

Fixed count.

Sequence

Count-prefixed repeat; capacity is checked by the offline decoder.

Fields

element: ValueDecodeRef

Child representation.

count: Scalar

Count encoding.

capacity: Option<usize>

Native capacity, when bounded.

Map

Count-prefixed key/value pairs.

Fields

key: ValueDecodeRef

Key representation.

value: ValueDecodeRef

Value representation.

Option(ValueDecodeRef)

One-byte presence tag followed by an optional child.

Delegate(ValueDecodeRef)

Transparent indirection retaining the child’s original type binding.

Enum

Integer tag followed by the selected branch.

Fields

tag: Scalar

Tag encoding.

variants: &'static [ValueDecodeVariant]

Supported branches.

Trait Implementations

impl Clone for ValueDecodeSpec

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ValueDecodeSpec

impl Debug for ValueDecodeSpec

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

Formats the value using the given formatter.