Struct StableCrateId

pub struct StableCrateId(pub(crate) Hash64);

A StableCrateId is a 64-bit hash of a crate name, together with all -Cmetadata arguments, and some other data. It is to CrateNum what DefPathHash is to DefId. It is stable across compilation sessions.

Since the ID is a hash value, there is a small chance that two crates end up with the same StableCrateId. The compiler will check for such collisions when loading crates and abort compilation in order to avoid further trouble.

For more information on the possibility of hash collisions in rustc, see the discussion in DefId.

Tuple Fields

0: Hash64

Implementations

impl StableCrateId

pub fn new( crate_name: Symbol, is_exe: bool, metadata: Vec<String>, cfg_version: &'static str, ) -> StableCrateId

Computes the stable ID for a crate with the given name and -Cmetadata arguments.

pub fn as_u64(self) -> u64

Trait Implementations

impl Clone for StableCrateId

fn clone(&self) -> StableCrateId

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for StableCrateId

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

Formats the value using the given formatter.

impl<__D> Decodable<__D> for StableCrateId

where __D: SpanDecoder,

fn decode(__decoder: &mut __D) -> StableCrateId

impl<__E> Encodable<__E> for StableCrateId

where __E: SpanEncoder,

fn encode(&self, __encoder: &mut __E)

impl Hash for StableCrateId

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

where __H: Hasher,

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<__CTX> HashStable<__CTX> for StableCrateId

where __CTX: HashStableContext,

fn hash_stable( &self, __hcx: &mut __CTX, __hasher: &mut StableHasher<SipHasher128>, )

impl LowerHex for StableCrateId

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

Formats the value using the given formatter.

impl Ord for StableCrateId

fn cmp(&self, other: &StableCrateId) -> Ordering

This method returns an Ordering between self and other.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

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

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for StableCrateId

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for StableCrateId

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl Copy for StableCrateId

impl Eq for StableCrateId

impl StructuralPartialEq for StableCrateId

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: 8 bytes