[][src]Struct rustc::hir::def_id::DefIndex

pub struct DefIndex(u32);
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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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Converts this DefIndex into a zero-based array index. This index is the offset within the given DefIndexAddressSpace.

🔬 This is a nightly-only experimental API. (rustc_private)

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🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Trait Implementations

impl<'a, 'gcx: 'tcx + 'a, 'tcx: 'a> DepNodeParams<'a, 'gcx, 'tcx> for DefIndex
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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

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impl Clone for DefIndex
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Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

impl PartialEq for DefIndex
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This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

impl Eq for DefIndex
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impl PartialOrd for DefIndex
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This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

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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This method returns an Ordering between self and other. Read more

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

impl Hash for DefIndex
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Feeds this value into the given [Hasher]. Read more

Feeds a slice of this type into the given [Hasher]. Read more

impl Copy for DefIndex
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impl Debug for DefIndex
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Formats the value using the given formatter. Read more

impl UseSpecializedEncodable for DefIndex
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Defaults to returning an error (see SpecializationError).

impl UseSpecializedDecodable for DefIndex
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Defaults to returning an error (see SpecializationError).

impl<'a> HashStable<StableHashingContext<'a>> for DefIndex
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impl<'a> ToStableHashKey<StableHashingContext<'a>> for DefIndex
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impl Key for DefIndex
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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

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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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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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Encode the value in a manner specific to this encoder state.

Auto Trait Implementations

impl Send for DefIndex

impl Sync for DefIndex

Blanket Implementations

impl<T> MaybeResult for T
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🔬 This is a nightly-only experimental API. (rustc_private)

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impl<'a, T> Captures for T where
    T: ?Sized
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impl<T> ToOwned for T where
    T: Clone
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Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T> From for T
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Performs the conversion.

impl<T, U> Into for T where
    U: From<T>, 
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Performs the conversion.

impl<T, U> TryFrom for T where
    T: From<U>, 
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The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T> Borrow for T where
    T: ?Sized
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Important traits for &'a mut R

Immutably borrows from an owned value. Read more

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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The type returned in the event of a conversion error.

🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T> BorrowMut for T where
    T: ?Sized
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Important traits for &'a mut R

Mutably borrows from an owned value. Read more

impl<T> Any for T where
    T: 'static + ?Sized
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🔬 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
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impl<T> Decodable for T where
    T: UseSpecializedDecodable
[src]

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impl<E> SpecializationError for E
[src]

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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> Send for T where
    T: ?Sized
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impl<T> Sync for T where
    T: ?Sized
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impl<T> Erased for T