[−][src]Struct rustc::traits::specialization_graph::Graph
🔬 This is a nightly-only experimental API. (rustc_private
)
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A per-trait graph of impls in specialization order. At the moment, this graph forms a tree rooted with the trait itself, with all other nodes representing impls, and parent-child relationships representing specializations.
The graph provides two key services:
-
Construction, which implicitly checks for overlapping impls (i.e., impls that overlap but where neither specializes the other -- an artifact of the simple "chain" rule.
-
Parent extraction. In particular, the graph can give you the immediate parents of a given specializing impl, which is needed for extracting default items amongst other things. In the simple "chain" rule, every impl has at most one parent.
Fields
parent: DefIdMap<DefId>
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children: DefIdMap<Children>
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Methods
impl<'a, 'gcx, 'tcx> Graph
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impl<'a, 'gcx, 'tcx> Graph
pub fn new() -> Graph
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pub fn new() -> Graph
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pub fn insert(
&mut self,
tcx: TyCtxt<'a, 'gcx, 'tcx>,
impl_def_id: DefId
) -> Result<Option<OverlapError>, OverlapError>
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pub fn insert(
&mut self,
tcx: TyCtxt<'a, 'gcx, 'tcx>,
impl_def_id: DefId
) -> Result<Option<OverlapError>, OverlapError>
🔬 This is a nightly-only experimental API. (rustc_private
)
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Insert a local impl into the specialization graph. If an existing impl
conflicts with it (has overlap, but neither specializes the other),
information about the area of overlap is returned in the Err
.
pub fn record_impl_from_cstore(
&mut self,
tcx: TyCtxt<'a, 'gcx, 'tcx>,
parent: DefId,
child: DefId
)
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pub fn record_impl_from_cstore(
&mut self,
tcx: TyCtxt<'a, 'gcx, 'tcx>,
parent: DefId,
child: DefId
)
🔬 This is a nightly-only experimental API. (rustc_private
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Insert cached metadata mapping from a child impl back to its parent.
pub fn parent(&self, child: DefId) -> DefId
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pub fn parent(&self, child: DefId) -> DefId
🔬 This is a nightly-only experimental API. (rustc_private
)
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The parent of a given impl, which is the def id of the trait when the impl is a "specialization root".
Trait Implementations
impl Encodable for Graph
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impl Encodable for Graph
fn encode<__S: Encoder>(&self, s: &mut __S) -> Result<(), __S::Error>
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fn encode<__S: Encoder>(&self, s: &mut __S) -> Result<(), __S::Error>
🔬 This is a nightly-only experimental API. (rustc_private
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impl Decodable for Graph
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impl Decodable for Graph
fn decode<__D: Decoder>(d: &mut __D) -> Result<Graph, __D::Error>
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fn decode<__D: Decoder>(d: &mut __D) -> Result<Graph, __D::Error>
🔬 This is a nightly-only experimental API. (rustc_private
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impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for Graph
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impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for Graph
fn hash_stable<W: StableHasherResult>(
&self,
__ctx: &mut StableHashingContext<'a>,
__hasher: &mut StableHasher<W>
)
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fn hash_stable<W: StableHasherResult>(
&self,
__ctx: &mut StableHashingContext<'a>,
__hasher: &mut StableHasher<W>
)
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Auto Trait Implementations
Blanket Implementations
impl<T> MaybeResult for T
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impl<T> MaybeResult for T
fn from_ok(T) -> T
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fn from_ok(T) -> T
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fn map_same<F>(Self, F) -> T where
F: FnOnce(T) -> T,
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fn map_same<F>(Self, 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,
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
[src]
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
🔬 This is a nightly-only experimental API. (get_type_id
)
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,
[src]
impl<T> Encodable for T where
T: UseSpecializedEncodable + ?Sized,
fn encode<E>(&self, e: &mut E) -> Result<(), <E as Encoder>::Error> where
E: Encoder,
[src]
fn encode<E>(&self, e: &mut E) -> Result<(), <E as Encoder>::Error> where
E: Encoder,
🔬 This is a nightly-only experimental API. (rustc_private
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impl<T> Decodable for T where
T: UseSpecializedDecodable,
[src]
impl<T> Decodable for T where
T: UseSpecializedDecodable,
fn decode<D>(d: &mut D) -> Result<T, <D as Decoder>::Error> where
D: Decoder,
[src]
fn decode<D>(d: &mut D) -> Result<T, <D as Decoder>::Error> where
D: Decoder,
🔬 This is a nightly-only experimental API. (rustc_private
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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,
[src]
fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where
T: ?Sized,
🔬 This is a nightly-only experimental API. (rustc_private
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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