Trait EntryExt

pub trait EntryExt<'a, K: 'a, V: 'a> {
    // Required method
    fn or_insert_with_fallible<E, F: FnOnce() -> Result<V, E>>(
        self,
        default: F,
    ) -> Result<&'a mut V, E>;
}

Trait to add helper methods on map-like entry types.

Required Methods

fn or_insert_with_fallible<E, F: FnOnce() -> Result<V, E>>( self, default: F, ) -> Result<&'a mut V, E>

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<'a, K: 'a, V: 'a> EntryExt<'a, K, V> for Entry<'a, K, V>

fn or_insert_with_fallible<E, F: FnOnce() -> Result<V, E>>( self, default: F, ) -> Result<&'a mut V, E>

impl<'a, K: Ord + 'a, V: 'a> EntryExt<'a, K, V> for Entry<'a, K, V>

fn or_insert_with_fallible<E, F: FnOnce() -> Result<V, E>>( self, default: F, ) -> Result<&'a mut V, E>

Implementors