Struct rustc::hir::HirId

pub struct HirId {
    pub owner: DefIndex,
    pub local_id: ItemLocalId,
}

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

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A HirId uniquely identifies a node in the HIR of the current crate. It is composed of the owner, which is the DefIndex of the directly enclosing hir::Item, hir::TraitItem, or hir::ImplItem (i.e. the closest "item-like"), and the local_id which is unique within the given owner.

This two-level structure makes for more stable values: One can move an item around within the source code, or add or remove stuff before it, without the local_id part of the HirId changing, which is a very useful property in incremental compilation where we have to persist things through changes to the code base.

Fields

owner: DefIndex

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

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local_id: ItemLocalId

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

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Methods

impl HirId

pub fn owner_def_id(self) -> DefId

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pub fn owner_local_def_id(self) -> LocalDefId

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

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Trait Implementations

impl Copy for HirId

impl Clone for HirId

fn clone(&self) -> HirId

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialEq for HirId

fn eq(&self, __arg_0: &HirId) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, __arg_0: &HirId) -> bool

This method tests for !=.

impl Eq for HirId

impl Hash for HirId

fn hash<__H: Hasher>(&self, __arg_0: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

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

impl PartialOrd for HirId

fn partial_cmp(&self, __arg_0: &HirId) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, __arg_0: &HirId) -> bool

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

fn le(&self, __arg_0: &HirId) -> bool

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

fn gt(&self, __arg_0: &HirId) -> bool

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

fn ge(&self, __arg_0: &HirId) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Ord for HirId

fn cmp(&self, __arg_0: &HirId) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

impl Debug for HirId

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl UseSpecializedEncodable for HirId

fn default_encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error>

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

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Defaults to returning an error (see SpecializationError).

impl UseSpecializedDecodable for HirId

fn default_decode<D: Decoder>(d: &mut D) -> Result<HirId, D::Error>

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

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Defaults to returning an error (see SpecializationError).

impl<'gcx> HashStable<StableHashingContext<'gcx>> for HirId

fn hash_stable<W: StableHasherResult>(
    &self,
    hcx: &mut StableHashingContext<'gcx>,
    hasher: &mut StableHasher<W>
)

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

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impl<'gcx> ToStableHashKey<StableHashingContext<'gcx>> for HirId

type KeyType = (DefPathHash, ItemLocalId)

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

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fn to_stable_hash_key(
    &self,
    hcx: &StableHashingContext<'gcx>
) -> (DefPathHash, ItemLocalId)

🔬 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?