Trait UpdateOr

pub trait UpdateOr<K, V> {
    // Required method
    fn update_or<F>(&mut self, key: &K, f: F, default: V)
       where F: FnOnce(&mut V);
}

Required Methods

fn update_or<F>(&mut self, key: &K, f: F, default: V)

where F: FnOnce(&mut V),

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> UpdateOr<K, V> for HashMap<K, V>

where K: Hash + Eq + Copy,

fn update_or<F>(&mut self, key: &K, f: F, default: V)

where F: FnOnce(&mut V),

Implementors