Enum CompressionBackend 

#[non_exhaustive]
pub enum CompressionBackend {
    Zpaq {
        method: ZpaqMethodSpec,
        threads: NonZeroUsize,
    },
    Rwkv7 {
        method: MethodSpec,
        coder: CoderType,
    },
    Rate {
        rate_backend: RateBackend,
        coder: CoderType,
        framing: FramingMode,
    },
}

Compression backend used by NCD/compression-size operations.

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.

Zpaq

ZPAQ compressor with explicit method string.

Fields

method: ZpaqMethodSpec

Typed ZPAQ method specification.

threads: NonZeroUsize

Internal ZPAQ compression thread count (1 => single-threaded).

Rwkv7

RWKV7 compressor configured by typed method specification.

Fields

method: MethodSpec

RWKV7 method specification.

coder: CoderType

Entropy coder used for coding model PDFs.

Rate

Generic rate-coded compressor wrapping an arbitrary rate backend.

Fields

rate_backend: RateBackend

Predictive rate backend.

coder: CoderType

Entropy coder used for coding model PDFs.

framing: FramingMode

Framing mode for output payloads.

Implementations

impl CompressionBackend

pub fn zpaq(method: impl Into<ZpaqMethodSpec>) -> Self

Construct a ZPAQ compression backend with default internal threading (threads = 1).

pub fn zpaq_with_threads( method: impl Into<ZpaqMethodSpec>, threads: NonZeroUsize, ) -> Self

Construct a ZPAQ compression backend with explicit internal thread count.

pub fn try_default() -> InfotheoryResult<Self>

Returns the current build’s implicit default compression backend.

pub fn validate_in( &self, env: &SpecEnvironment, ) -> SpecResult<ValidatedCompressionBackend>

Validate and canonicalize this backend in the provided compilation environment.

pub fn validate(&self) -> SpecResult<ValidatedCompressionBackend>

Validate and canonicalize this backend using the default environment.

pub fn compile_in( &self, env: &SpecEnvironment, ) -> SpecResult<CompiledCompressionBackend>

Validate and compile this backend in the provided compilation environment.

pub fn compile(&self) -> SpecResult<CompiledCompressionBackend>

Validate and compile this backend using the default environment.

Trait Implementations

impl CanonicalJson for CompressionBackend

fn to_canonical_json_value(&self) -> SpecResult<Value>

Serialize this value into canonical JSON value form.

fn to_canonical_json(&self) -> SpecResult<String>

Serialize this value into deterministic canonical JSON text.

impl Clone for CompressionBackend

fn clone(&self) -> CompressionBackend

Returns a duplicate of the value.

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

Performs copy-assignment from source.