Struct rustc_session::session::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.

See the discussion in DefId for more information on the possibility of hash collisions in rustc,

Tuple Fields

0: u64

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