[−][src]Struct rustc_metadata::schema::LazySeq
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A sequence of type T referred to by its absolute position
in the metadata and length, and which can be decoded lazily.
The sequence is a single node for the purposes of Lazy
.
Unlike Lazy<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 Lazy
, 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
len: usize
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position: usize
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_marker: PhantomData<T>
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Methods
impl<'tcx> LazySeq<Index>
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impl<'tcx> LazySeq<Index>
pub fn lookup(
&self,
bytes: &[u8],
def_index: DefIndex
) -> Option<Lazy<Entry<'tcx>>>
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pub fn lookup(
&self,
bytes: &[u8],
def_index: DefIndex
) -> Option<Lazy<Entry<'tcx>>>
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Given the metadata, extract out the offset of a particular DefIndex (if any).
impl<'a, 'tcx: 'a, T: Decodable> LazySeq<T>
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impl<'a, 'tcx: 'a, T: Decodable> LazySeq<T>
pub fn decode<M: Metadata<'a, 'tcx>>(
self,
meta: M
) -> impl Iterator<Item = T> + Captures<'tcx> + 'a
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pub fn decode<M: Metadata<'a, 'tcx>>(
self,
meta: M
) -> impl Iterator<Item = T> + Captures<'tcx> + 'a
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impl<T> LazySeq<T>
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impl<T> LazySeq<T>
pub fn empty() -> LazySeq<T>
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pub fn empty() -> LazySeq<T>
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pub fn with_position_and_length(position: usize, len: usize) -> LazySeq<T>
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pub fn with_position_and_length(position: usize, len: usize) -> LazySeq<T>
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pub fn min_size(length: usize) -> usize
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pub fn min_size(length: usize) -> usize
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Returns the minimum encoded size of length
values of type T
.
Trait Implementations
impl<'a, 'tcx, T> SpecializedEncoder<LazySeq<T>> for EncodeContext<'a, 'tcx>
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impl<'a, 'tcx, T> SpecializedEncoder<LazySeq<T>> for EncodeContext<'a, 'tcx>
fn specialized_encode(&mut self, seq: &LazySeq<T>) -> Result<(), Self::Error>
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fn specialized_encode(&mut self, seq: &LazySeq<T>) -> Result<(), Self::Error>
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Encode the value in a manner specific to this encoder state.
impl<'a, 'tcx, T> SpecializedDecoder<LazySeq<T>> for DecodeContext<'a, 'tcx>
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impl<'a, 'tcx, T> SpecializedDecoder<LazySeq<T>> for DecodeContext<'a, 'tcx>
fn specialized_decode(&mut self) -> Result<LazySeq<T>, Self::Error>
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fn specialized_decode(&mut self) -> Result<LazySeq<T>, Self::Error>
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Decode a value in a manner specific to this decoder state.
impl<T> Copy for LazySeq<T>
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impl<T> Copy for LazySeq<T>
impl<T> Clone for LazySeq<T>
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impl<T> Clone for LazySeq<T>
fn clone(&self) -> Self
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fn clone(&self) -> Self
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
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fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
impl<T> UseSpecializedEncodable for LazySeq<T>
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impl<T> UseSpecializedEncodable for LazySeq<T>
fn default_encode<E>(&self, &mut E) -> Result<(), <E as Encoder>::Error> where
E: Encoder,
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fn default_encode<E>(&self, &mut E) -> Result<(), <E as Encoder>::Error> where
E: Encoder,
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Defaults to returning an error (see SpecializationError
).
impl<T> UseSpecializedDecodable for LazySeq<T>
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impl<T> UseSpecializedDecodable for LazySeq<T>
fn default_decode<D>(&mut D) -> Result<Self, <D as Decoder>::Error> where
D: Decoder,
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fn default_decode<D>(&mut D) -> Result<Self, <D as Decoder>::Error> where
D: Decoder,
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Defaults to returning an error (see SpecializationError
).
impl<CTX, T> HashStable<CTX> for LazySeq<T>
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impl<CTX, T> HashStable<CTX> for LazySeq<T>
fn hash_stable<W: StableHasherResult>(
&self,
_: &mut CTX,
_: &mut StableHasher<W>
)
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fn hash_stable<W: StableHasherResult>(
&self,
_: &mut CTX,
_: &mut StableHasher<W>
)
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Auto Trait Implementations
Blanket Implementations
impl<T> ToOwned for T where
T: Clone,
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impl<T> ToOwned for T where
T: Clone,
type Owned = T
fn to_owned(&self) -> T
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fn to_owned(&self) -> T
Creates owned data from borrowed data, usually by cloning. Read more
fn clone_into(&self, target: &mut T)
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fn clone_into(&self, target: &mut T)
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)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
impl<T> From for T
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impl<T> From for T
impl<T, U> Into for T where
U: From<T>,
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impl<T, U> Into for T where
U: From<T>,
impl<T, U> TryFrom for T where
T: From<U>,
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impl<T, U> TryFrom for T where
T: From<U>,
type Error = !
try_from
)The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
try_from
)Performs the conversion.
impl<T> Borrow for T where
T: ?Sized,
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impl<T> Borrow for T where
T: ?Sized,
ⓘImportant traits for &'a mut Rfn borrow(&self) -> &T
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fn borrow(&self) -> &T
Immutably borrows from an owned value. Read more
impl<T, U> TryInto for T where
U: TryFrom<T>,
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impl<T, U> TryInto for T where
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
try_from
)The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
try_from
)Performs the conversion.
impl<T> BorrowMut for T where
T: ?Sized,
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impl<T> BorrowMut for T where
T: ?Sized,
ⓘImportant traits for &'a mut Rfn borrow_mut(&mut self) -> &mut T
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fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
impl<T> Any for T where
T: 'static + ?Sized,
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impl<T> Any for T where
T: 'static + ?Sized,
fn get_type_id(&self) -> TypeId
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fn get_type_id(&self) -> TypeId
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)
this method will likely be replaced by an associated static
Gets the TypeId
of self
. Read more
impl<T> Encodable for T where
T: UseSpecializedEncodable + ?Sized,
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impl<T> Encodable for T where
T: UseSpecializedEncodable + ?Sized,
fn encode<E>(&self, e: &mut E) -> Result<(), <E as Encoder>::Error> where
E: Encoder,
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fn encode<E>(&self, e: &mut E) -> Result<(), <E as Encoder>::Error> where
E: Encoder,
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impl<T> Decodable for T where
T: UseSpecializedDecodable,
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impl<T> Decodable for T where
T: UseSpecializedDecodable,
fn decode<D>(d: &mut D) -> Result<T, <D as Decoder>::Error> where
D: Decoder,
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fn decode<D>(d: &mut D) -> Result<T, <D as Decoder>::Error> where
D: Decoder,
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impl<E> SpecializationError for E
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impl<E> SpecializationError for E
fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where
T: ?Sized,
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fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where
T: ?Sized,
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Create an error for a missing method specialization. Defaults to panicking with type, trait & method names. S
is the encoder/decoder state type, T
is the type being encoded/decoded, and the arguments are the names of the trait and method that should've been overridden. Read more
impl<T> Erased for T
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impl<T> Erased for T
impl<T> Send for T where
T: ?Sized,
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impl<T> Send for T where
T: ?Sized,
impl<T> Sync for T where
T: ?Sized,
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impl<T> Sync for T where
T: ?Sized,
impl<T> Erased for T
impl<T> Erased for T
impl<T> MaybeResult for T
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impl<T> MaybeResult for T
fn from_ok(x: T) -> T
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fn from_ok(x: T) -> T
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fn map_same<F>(self, f: F) -> T where
F: FnOnce(T) -> T,
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fn map_same<F>(self, f: F) -> T where
F: FnOnce(T) -> T,
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impl<'a, T> Captures for T where
T: ?Sized,
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impl<'a, T> Captures for T where
T: ?Sized,