Struct rustc_metadata::rmeta::LazyArray

struct LazyArray<T> {
    position: NonZeroUsize,
    num_elems: usize,
    _marker: PhantomData<fn() -> T>,
}

A list of lazily-decoded values.

Unlike LazyValue<Vec<T>>, the length is encoded next to the position, not at the position, which means that the length doesn’t need to be known before encoding all the elements.

If the length is 0, no position is encoded, but otherwise, the encoding is that of LazyArray, with the distinction that the minimal distance the length of the sequence, i.e. it’s assumed there’s no 0-byte element in the sequence.

Fields

position: NonZeroUsize

num_elems: usize

_marker: PhantomData<fn() -> T>

Implementations

impl<T: ParameterizedOverTcx> LazyArray<T>

fn decode<'a, 'tcx, M: Metadata<'a, 'tcx>>( self, metadata: M ) -> DecodeIterator<'a, 'tcx, T::Value<'tcx>>

where T::Value<'tcx>: Decodable<DecodeContext<'a, 'tcx>>,

impl<T> LazyArray<T>

fn write_to_bytes_impl(self, dest: &mut [u8; 16])

fn from_bytes_impl(position: &[u8; 8], meta: &[u8; 8]) -> Option<LazyArray<T>>

impl<T> LazyArray<T>

fn from_position_and_num_elems( position: NonZeroUsize, num_elems: usize ) -> LazyArray<T>

Trait Implementations

impl<T> Clone for LazyArray<T>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a, 'tcx, T> Decodable<DecodeContext<'a, 'tcx>> for LazyArray<T>

fn decode(decoder: &mut DecodeContext<'a, 'tcx>) -> Self

impl<T> Default for LazyArray<T>

fn default() -> LazyArray<T>

Returns the “default value” for a type.

impl<'a, 'tcx, T> Encodable<EncodeContext<'a, 'tcx>> for LazyArray<T>

fn encode(&self, e: &mut EncodeContext<'a, 'tcx>)

impl<T> FixedSizeEncoding for LazyArray<T>

type ByteArray = [u8; 16]

This should be [u8; BYTE_LEN]; Cannot use an associated const BYTE_LEN: usize instead due to const eval limitations.

fn from_bytes(b: &[u8; 16]) -> Self

fn write_to_bytes(self, b: &mut [u8; 16])

impl<T> IsDefault for LazyArray<T>

fn is_default(&self) -> bool

impl<T: ParameterizedOverTcx> ParameterizedOverTcx for LazyArray<T>

type Value<'tcx> = LazyArray<<T as ParameterizedOverTcx>::Value<'tcx>>

impl<T> Copy for LazyArray<T>

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes