Enum q_compress::PrefixMetadata

pub enum PrefixMetadata<T: NumberLike> {
    Simple {
        prefixes: Vec<Prefix<T>>,
    },
    Delta {
        prefixes: Vec<Prefix<T::Signed>>,
    },
}

A wrapper for prefixes in the two cases cases: delta encoded or not.

This is the part of chunk metadata that describes how the data was compressed - the Huffman codes used and what ranges they specify.

Variants

Simple

Fields

prefixes: Vec<Prefix<T>>

Simple prefix metadata corresponds to the case when delta encoding is off (delta_encoding_order of 0).

It simply contains prefixes of the same data type being compressed.

Delta

Fields

Non-exhaustive enum variants could have additional fields added in future. Therefore, non-exhaustive enum variants cannot be constructed in external crates and cannot be matched against.

prefixes: Vec<Prefix<T::Signed>>

Delta prefix metadata corresponds to the case when delta encoding is on.

It contains prefixes of the associated SignedLike type (what the deltas are expressed as). For instance, a chunk of delta-encoded f64s with delta_encoding_order: 1 will have prefixes of type i64, where a delta of n indicates a change of n * machine epsilon from the last float.

Trait Implementations

impl<T: Clone + NumberLike> Clone for PrefixMetadata<T>where T::Signed: Clone,

fn clone(&self) -> PrefixMetadata<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug + NumberLike> Debug for PrefixMetadata<T>where T::Signed: Debug,

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

Formats the value using the given formatter.

impl<T: PartialEq + NumberLike> PartialEq<PrefixMetadata<T>> for PrefixMetadata<T>where T::Signed: PartialEq,

fn eq(&self, other: &PrefixMetadata<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T: NumberLike> StructuralPartialEq for PrefixMetadata<T>