Module zerovec::ule

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Expand description

Traits over unaligned little-endian data (ULE, pronounced “yule”).

The main traits for this module are ULE, AsULE and, VarULE.

See the design doc for details on how these traits works under the hood.

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Modules§

Structs§

  • A u8 array of little-endian data corresponding to a Unicode scalar value.
  • This type is used by the custom derive to represent multiple VarULE fields packed into a single end-of-struct field. It is not recommended to use this type directly.
  • Optional type which uses NichedOptionULE<U,N> as ULE type. The implementors guarantee that N == core::mem::sizeo_of::<Self>() [repr(transparent)] guarantees that the layout is same as Option<U>
  • This type is the ULE type for Option<U> where U is a ULE type
  • A type allowing one to represent Option<U> for VarULE U types.
  • A u8 array of little-endian data with infallible conversions to and from &u8.
  • A u8 array of little-endian data that is expected to be a Unicode scalar value, but is not validated as such.
  • A byte slice that is expected to be a UTF-8 string but does not enforce that invariant.

Traits§

  • A trait for any type that has a 1:1 mapping with an unaligned little-endian (ULE) type.
  • Allows types to be encoded as VarULEs. This is highly useful for implementing VarULE on custom DSTs where the type cannot be obtained as a reference to some other type.
  • An EqULE type is one whose byte sequence equals the byte sequence of its ULE type on little-endian platforms. This enables certain performance optimizations, such as ZeroVec::try_from_slice.
  • The ULE types implementing this trait guarantee that NicheBytes::NICHE_BIT_PATTERN can never occur as a valid byte representation of the type.
  • A trait for a type where aligned slices can be cast to unaligned slices.
  • Fixed-width, byte-aligned data that can be cast to and from a little-endian byte slice.
  • Variable-width, byte-aligned data that can be cast to and from a little-endian byte slice.

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Derive Macros§