[−][src]Struct rustc::hir::def_id::DefIndex
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)
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A DefIndex is an index into the hir-map for a crate, identifying a particular definition. It should really be considered an interned shorthand for a particular DefPath.
At the moment we are allocating the numerical values of DefIndexes from two address spaces: DefIndexAddressSpace::Low and DefIndexAddressSpace::High. This allows us to allocate the DefIndexes of all item-likes (Items, TraitItems, and ImplItems) into one of these spaces and consequently use a simple array for lookup tables keyed by DefIndex and known to be densely populated. This is especially important for the HIR map.
Since the DefIndex is mostly treated as an opaque ID, you probably don't have to care about these address spaces.
Methods
impl DefIndex
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impl DefIndex
pub fn address_space(&self) -> DefIndexAddressSpace
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pub fn address_space(&self) -> DefIndexAddressSpace
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pub fn as_array_index(&self) -> usize
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pub fn as_array_index(&self) -> usize
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Converts this DefIndex into a zero-based array index. This index is the offset within the given DefIndexAddressSpace.
pub fn from_array_index(
i: usize,
address_space: DefIndexAddressSpace
) -> DefIndex
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pub fn from_array_index(
i: usize,
address_space: DefIndexAddressSpace
) -> DefIndex
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pub fn from_proc_macro_index(proc_macro_index: usize) -> DefIndex
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pub fn from_proc_macro_index(proc_macro_index: usize) -> DefIndex
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pub fn to_proc_macro_index(self: DefIndex) -> usize
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pub fn to_proc_macro_index(self: DefIndex) -> usize
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pub fn from_raw_u32(x: u32) -> DefIndex
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pub fn from_raw_u32(x: u32) -> DefIndex
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pub fn as_raw_u32(&self) -> u32
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pub fn as_raw_u32(&self) -> u32
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Trait Implementations
impl<'a, 'gcx: 'tcx + 'a, 'tcx: 'a> DepNodeParams<'a, 'gcx, 'tcx> for DefIndex
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impl<'a, 'gcx: 'tcx + 'a, 'tcx: 'a> DepNodeParams<'a, 'gcx, 'tcx> for DefIndex
const CAN_RECONSTRUCT_QUERY_KEY: bool
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fn to_fingerprint(&self, tcx: TyCtxt) -> Fingerprint
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fn to_fingerprint(&self, tcx: TyCtxt) -> Fingerprint
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This method turns the parameters of a DepNodeConstructor into an opaque Fingerprint to be used in DepNode. Not all DepNodeParams support being turned into a Fingerprint (they don't need to if the corresponding DepNode is anonymous). Read more
fn to_debug_str(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>) -> String
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fn to_debug_str(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>) -> String
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impl Clone for DefIndex
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impl Clone for DefIndex
fn clone(&self) -> DefIndex
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fn clone(&self) -> DefIndex
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
impl PartialEq for DefIndex
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impl PartialEq for DefIndex
fn eq(&self, other: &DefIndex) -> bool
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fn eq(&self, other: &DefIndex) -> bool
This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, other: &DefIndex) -> bool
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fn ne(&self, other: &DefIndex) -> bool
This method tests for !=
.
impl Eq for DefIndex
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impl Eq for DefIndex
fn assert_receiver_is_total_eq(&self)
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fn assert_receiver_is_total_eq(&self)
impl PartialOrd for DefIndex
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impl PartialOrd for DefIndex
fn partial_cmp(&self, other: &DefIndex) -> Option<Ordering>
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fn partial_cmp(&self, other: &DefIndex) -> Option<Ordering>
This method returns an ordering between self
and other
values if one exists. Read more
fn lt(&self, other: &DefIndex) -> bool
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fn lt(&self, other: &DefIndex) -> bool
This method tests less than (for self
and other
) and is used by the <
operator. Read more
fn le(&self, other: &DefIndex) -> bool
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fn le(&self, other: &DefIndex) -> bool
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
fn gt(&self, other: &DefIndex) -> bool
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fn gt(&self, other: &DefIndex) -> bool
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
fn ge(&self, other: &DefIndex) -> bool
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fn ge(&self, other: &DefIndex) -> bool
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl Ord for DefIndex
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impl Ord for DefIndex
fn cmp(&self, other: &DefIndex) -> Ordering
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fn cmp(&self, other: &DefIndex) -> Ordering
This method returns an Ordering
between self
and other
. Read more
fn max(self, other: Self) -> Self
1.21.0[src]
fn max(self, other: Self) -> Self
Compares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self
1.21.0[src]
fn min(self, other: Self) -> Self
Compares and returns the minimum of two values. Read more
impl Hash for DefIndex
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impl Hash for DefIndex
fn hash<__H: Hasher>(&self, state: &mut __H)
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fn hash<__H: Hasher>(&self, state: &mut __H)
Feeds this value into the given [Hasher
]. Read more
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
Feeds a slice of this type into the given [Hasher
]. Read more
impl Copy for DefIndex
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impl Copy for DefIndex
impl Debug for DefIndex
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impl Debug for DefIndex
fn fmt(&self, f: &mut Formatter) -> Result
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fn fmt(&self, f: &mut Formatter) -> Result
Formats the value using the given formatter. Read more
impl UseSpecializedEncodable for DefIndex
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impl UseSpecializedEncodable for DefIndex
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 UseSpecializedDecodable for DefIndex
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impl UseSpecializedDecodable for DefIndex
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<'a> HashStable<StableHashingContext<'a>> for DefIndex
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impl<'a> HashStable<StableHashingContext<'a>> for DefIndex
fn hash_stable<W: StableHasherResult>(
&self,
hcx: &mut StableHashingContext<'a>,
hasher: &mut StableHasher<W>
)
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fn hash_stable<W: StableHasherResult>(
&self,
hcx: &mut StableHashingContext<'a>,
hasher: &mut StableHasher<W>
)
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impl<'a> ToStableHashKey<StableHashingContext<'a>> for DefIndex
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impl<'a> ToStableHashKey<StableHashingContext<'a>> for DefIndex
type KeyType = DefPathHash
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fn to_stable_hash_key(&self, hcx: &StableHashingContext<'a>) -> DefPathHash
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fn to_stable_hash_key(&self, hcx: &StableHashingContext<'a>) -> DefPathHash
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impl Key for DefIndex
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impl Key for DefIndex
fn query_crate(&self) -> CrateNum
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fn query_crate(&self) -> CrateNum
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Given an instance of this key, what crate is it referring to? This is used to find the provider. Read more
fn default_span(&self, _tcx: TyCtxt) -> Span
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fn default_span(&self, _tcx: TyCtxt) -> Span
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In the event that a cycle occurs, if no explicit span has been given for a query with key self
, what span should we use? Read more
impl<'a, 'tcx, 'x> SpecializedDecoder<DefIndex> for CacheDecoder<'a, 'tcx, 'x>
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impl<'a, 'tcx, 'x> SpecializedDecoder<DefIndex> for CacheDecoder<'a, 'tcx, 'x>
fn specialized_decode(&mut self) -> Result<DefIndex, Self::Error>
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fn specialized_decode(&mut self) -> Result<DefIndex, Self::Error>
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Decode a value in a manner specific to this decoder state.
impl<'enc, 'a, 'tcx, E> SpecializedEncoder<DefIndex> for CacheEncoder<'enc, 'a, 'tcx, E> where
E: 'enc + TyEncoder,
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impl<'enc, 'a, 'tcx, E> SpecializedEncoder<DefIndex> for CacheEncoder<'enc, 'a, 'tcx, E> where
E: 'enc + TyEncoder,
fn specialized_encode(&mut self, _: &DefIndex) -> Result<(), Self::Error>
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fn specialized_encode(&mut self, _: &DefIndex) -> Result<(), Self::Error>
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Encode the value in a manner specific to this encoder state.
Auto Trait Implementations
Blanket Implementations
impl<T> MaybeResult for T
[src]
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> 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
[src]
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,
[src]
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,
[src]
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
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impl<T> Sync for T where
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impl<T> Erased for T