Struct rustc_span::def_id::StableCrateId

pub struct StableCrateId(pub(crate) u64);

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: u64

Implementations

impl StableCrateId

pub fn to_u64(self) -> u64

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

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

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

Formats the value using the given formatter.

impl<__D: Decoder> Decodable<__D> for StableCrateId

fn decode(__decoder: &mut __D) -> Result<Self, <__D as Decoder>::Error>

impl<__E: Encoder> Encodable<__E> for StableCrateId

fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>

impl Hash for StableCrateId

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 StableCrateId where
    __CTX: HashStableContext, 

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

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

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<StableCrateId> for StableCrateId

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

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

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

This method tests for !=.

impl PartialOrd<StableCrateId> 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

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 Copy for StableCrateId

impl Eq for StableCrateId

impl StructuralEq 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