pub struct StableCrateId(pub(crate) u64);
StableCrateId is a 64-bit hash of a crate name, together with all
-Cmetadata arguments, and some other data. It is to
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
For more information on the possibility of hash collisions in rustc,
see the discussion in
Auto Trait Implementations§
Returns the argument unchanged.
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