Trait SimpleKeyedRef 

pub trait SimpleKeyedRef: KeyedRef {
    // Required method
    fn into_ref<'r>(r: Self::KeyRef<'r>) -> &'r Self::Key
       where Self: 'r;
}

Keyed collection where each key reference can be converted into a standard “simple” rust reference.

This trait is particularly useful to avoid having to include where bounds of the form for<'r> T::KeyRef<'r>: Into<&'r T::Key>, which can currently lead the compiler to try to prove T: 'static (see https://github.com/rust-lang/rust/pull/96709#issuecomment-1182403490) for more details.

Required Methods

fn into_ref<'r>(r: Self::KeyRef<'r>) -> &'r Self::Key

where Self: 'r,

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<K, V> SimpleKeyedRef for BTreeMap<K, V>

fn into_ref<'r>(r: Self::KeyRef<'r>) -> &'r Self::Key

where Self: 'r,

impl<K, V> SimpleKeyedRef for HashMap<K, V>

fn into_ref<'r>(r: Self::KeyRef<'r>) -> &'r Self::Key

where Self: 'r,

Implementors