// This is here because `rustc_session` wants to refer to it, // and so does `rustc_hir`, but `rustc_hir` shouldn't refer to `rustc_session`. use rustc_data_structures::fingerprint::Fingerprint; use rustc_data_structures::{base_n, impl_stable_hash_via_hash}; use std::fmt; /// Hash value constructed out of all the `-C metadata` arguments passed to the /// compiler. Together with the crate-name forms a unique global identifier for /// the crate. #[derive(Eq, PartialEq, Ord, PartialOrd, Hash, Debug, Clone, Copy, Encodable, Decodable)] pub struct CrateDisambiguator(Fingerprint); impl CrateDisambiguator { pub fn to_fingerprint(self) -> Fingerprint { self.0 } } impl fmt::Display for CrateDisambiguator { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> { let (a, b) = self.0.as_value(); let as_u128 = a as u128 | ((b as u128) << 64); f.write_str(&base_n::encode(as_u128, base_n::CASE_INSENSITIVE)) } } impl From<Fingerprint> for CrateDisambiguator { fn from(fingerprint: Fingerprint) -> CrateDisambiguator { CrateDisambiguator(fingerprint) } } impl_stable_hash_via_hash!(CrateDisambiguator);