Trait Map

Source

pub trait Map<C, T>: Default + FromIterator<(C, T)> {
    type Iter<'a>: Iterator<Item = (&'a C, &'a T)>
       where C: 'a,
             T: 'a,
             Self: 'a;
    type IntoEntries: Iterator<Item = (C, T)>;

    // Required methods
    fn get(&self, class: &C) -> Option<&T>;
    fn get_mut(&mut self, class: &C) -> Option<&mut T>;
    fn set(&mut self, class: C, value: T);
    fn iter(&self) -> Self::Iter<'_>;
    fn into_entries(self) -> Self::IntoEntries;

    // Provided methods
    fn singleton(class: C, value: T) -> Self { ... }
    fn contains(&self, class: &C) -> bool { ... }
    fn get_mut_or_insert_with(
        &mut self,
        class: &C,
        f: impl FnOnce() -> T,
    ) -> &mut T
       where C: Clone { ... }
    fn get_or_try_insert_with<E>(
        &mut self,
        class: &C,
        f: impl FnOnce() -> Result<T, E>,
    ) -> Result<&T, E>
       where C: Clone { ... }
}