Trait ToStableHashKey 

pub trait ToStableHashKey {
    type KeyType: Ord + Sized + StableHash;

    // Required method
    fn to_stable_hash_key<Hcx: StableHashCtxt>(
        &self,
        hcx: &mut Hcx,
    ) -> Self::KeyType;
}

Implement this for types that can be turned into stable keys like, for example, for DefId that can be converted to a DefPathHash. This is used for bringing maps into a predictable order before hashing them.

Required Associated Types

type KeyType: Ord + Sized + StableHash

Required Methods

fn to_stable_hash_key<Hcx: StableHashCtxt>( &self, hcx: &mut Hcx, ) -> Self::KeyType

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors