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use core::borrow::Borrow;

use super::{Collection, Get};

pub trait Set<'a, V, Q>: Collection + Get<&'a Q, Output = V>
where
    V: 'a + ?Sized + Borrow<Q>,
    Q: 'a + ?Sized,
{
    #[inline(always)]
    fn contains(&self, q: &'a Q) -> bool {
        self.get(q).is_some()
    }
}

impl<'a, V, Q, T> Set<'a, V, Q> for T
where
    T: 'a + Collection + Get<&'a Q, Output = V>,
    V: 'a + ?Sized + Borrow<Q>,
    Q: 'a + ?Sized,
{}