Struct rustc_hir::hir_id::ItemLocalId

pub struct ItemLocalId {
    private: u32,
}

An ItemLocalId uniquely identifies something within a given “item-like”; that is, within a hir::Item, hir::TraitItem, or hir::ImplItem. There is no guarantee that the numerical value of a given ItemLocalId corresponds to the node’s position within the owning item in any way, but there is a guarantee that the LocalItemIds within an owner occupy a dense range of integers starting at zero, so a mapping that maps all or most nodes within an “item-like” to something else can be implemented by a Vec instead of a tree or hash map.

Fields

private: u32

Implementations

impl ItemLocalId

pub const MAX_AS_U32: u32

Maximum value the index can take, as a u32.

pub const MAX: Self

Maximum value the index can take.

pub const fn from_usize(value: usize) -> Self

Creates a new index from a given usize.

Panics

Will panic if value exceeds MAX.

pub const fn from_u32(value: u32) -> Self

Creates a new index from a given u32.

Panics

Will panic if value exceeds MAX.

pub const unsafe fn from_u32_unchecked(value: u32) -> Self

Creates a new index from a given u32.

Safety

The provided value must be less than or equal to the maximum value for the newtype. Providing a value outside this range is undefined due to layout restrictions.

Prefer using from_u32.

pub const fn index(self) -> usize

Extracts the value of this index as a usize.

pub const fn as_u32(self) -> u32

Extracts the value of this index as a u32.

pub const fn as_usize(self) -> usize

Extracts the value of this index as a usize.

impl ItemLocalId

pub const INVALID: ItemLocalId

Signal local id which should never be used.

Trait Implementations

impl Add<usize> for ItemLocalId

type Output = Self

The resulting type after applying the + operator.

fn add(self, other: usize) -> Self

Performs the + operation.

impl Clone for ItemLocalId

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ItemLocalId

fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<D: Decoder> Decodable<D> for ItemLocalId

fn decode(d: &mut D) -> Self

impl<E: Encoder> Encodable<E> for ItemLocalId

fn encode(&self, e: &mut E) -> Result<(), E::Error>

impl From<ItemLocalId> for u32

fn from(v: ItemLocalId) -> u32

Performs the conversion.

impl From<ItemLocalId> for usize

fn from(v: ItemLocalId) -> usize

Performs the conversion.

impl From<u32> for ItemLocalId

fn from(value: u32) -> Self

Performs the conversion.

impl From<usize> for ItemLocalId

fn from(value: usize) -> Self

Performs the conversion.

impl Hash for ItemLocalId

fn hash<__H: Hasher>(&self, state: &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<CTX> HashStable<CTX> for ItemLocalId

fn hash_stable(&self, _: &mut CTX, hasher: &mut StableHasher)

impl Idx for ItemLocalId

fn new(value: usize) -> Self

fn index(self) -> usize

fn increment_by(&mut self, amount: usize)

fn plus(self, amount: usize) -> Self

impl Ord for ItemLocalId

fn cmp(&self, other: &ItemLocalId) -> 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.

fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl PartialEq<ItemLocalId> for ItemLocalId

fn eq(&self, other: &ItemLocalId) -> bool

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

fn ne(&self, other: &ItemLocalId) -> bool

This method tests for !=.

impl PartialOrd<ItemLocalId> for ItemLocalId

fn partial_cmp(&self, other: &ItemLocalId) -> Option<Ordering>

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

fn lt(&self, other: &Rhs) -> bool

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

fn le(&self, other: &Rhs) -> bool

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

fn gt(&self, other: &Rhs) -> bool

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

fn ge(&self, other: &Rhs) -> bool

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

impl Step for ItemLocalId

fn steps_between(start: &Self, end: &Self) -> Option<usize>

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

Returns the number of successor steps required to get from start to end.

fn forward_checked(start: Self, u: usize) -> Option<Self>

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

Returns the value that would be obtained by taking the successor of self count times.

fn backward_checked(start: Self, u: usize) -> Option<Self>

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

Returns the value that would be obtained by taking the predecessor of self count times.

fn forward(start: Self, count: usize) -> Self

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

Returns the value that would be obtained by taking the successor of self count times.

unsafe fn forward_unchecked(start: Self, count: usize) -> Self

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

Returns the value that would be obtained by taking the successor of self count times.

fn backward(start: Self, count: usize) -> Self

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

Returns the value that would be obtained by taking the predecessor of self count times.

unsafe fn backward_unchecked(start: Self, count: usize) -> Self

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

Returns the value that would be obtained by taking the predecessor of self count times.

impl<HirCtx: HashStableContext> ToStableHashKey<HirCtx> for ItemLocalId

type KeyType = ItemLocalId

fn to_stable_hash_key(&self, _: &HirCtx) -> ItemLocalId

impl Copy for ItemLocalId

impl Eq for ItemLocalId

impl StructuralEq for ItemLocalId

impl StructuralPartialEq for ItemLocalId

impl TrustedStep for ItemLocalId

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 4 bytes