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//! Traits for getting values from keys.
use iter_trait::HasMapData;

/// A trait for getting data out of a map.
pub trait Get: HasMapData {
    /// Gets the value at the given key.
    fn get(&self, key: &Self::Key) -> Option<&Self::Value>;

    /// Checks whether the map contains the given key.
    fn contains_key(&self, key: &Self::Key) -> bool {
        self.get(key).is_some()
    }
}

/// A trait for getting mutable references to data in a map.
pub trait GetMut: Get {
    /// Gets a reference to the value at the given key.
    fn get_mut(&mut self, key: &Self::Key) -> Option<&mut Self::Value>;
}