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", so this trait is not object safe.

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