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mod hash_set; /// A set. pub trait Set<'s, V: 's> { type Iter: Iterator<Item = &'s V>; /// Returns an iterator that iterates over all items in this set. fn iter(&'s self) -> Self::Iter; /// Inserts a new value into this set, optionally returning an old value it /// replaces. fn insert(&'s mut self, value: V) -> Option<V>; /// Removes a value from this set, returning it. fn remove(&'s mut self, value: &V) -> Option<V>; /// Returns whether this set contains a value. fn contains(&'s self, value: &V) -> bool; }