xsl 0.1.1

A simple library
Documentation 
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use super::{Iter, IterMut};
use core::{fmt, iter::FusedIterator};
pub struct ValuesMut<'a, K, V> {
    inner: IterMut<'a, K, V>,
}
impl<'a, K, V> ValuesMut<'a, K, V> {
    pub(super) fn new(inner: IterMut<'a, K, V>) -> Self {
        Self { inner }
    }
}
impl<K, V: fmt::Debug> fmt::Debug for ValuesMut<'_, K, V> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.debug_list()
            .entries(self.inner.iter().map(|(_, val)| val))
            .finish()
    }
}
impl<'a, K, V> Iterator for ValuesMut<'a, K, V> {
    type Item = &'a mut V;

    fn next(&mut self) -> Option<&'a mut V> {
        self.inner.next().map(|(_, v)| v)
    }

    fn size_hint(&self) -> (usize, Option<usize>) {
        self.inner.size_hint()
    }

    fn last(mut self) -> Option<&'a mut V> {
        self.next_back()
    }
}
impl<'a, K, V> DoubleEndedIterator for ValuesMut<'a, K, V> {
    fn next_back(&mut self) -> Option<&'a mut V> {
        self.inner.next_back().map(|(_, v)| v)
    }
}
impl<K, V> ExactSizeIterator for ValuesMut<'_, K, V> {
    fn len(&self) -> usize {
        self.inner.len()
    }
}

impl<K, V> FusedIterator for ValuesMut<'_, K, V> {}

pub struct Values<'a, K, V> {
    inner: Iter<'a, K, V>,
}

impl<'a, K, V> Values<'a, K, V> {
    pub(super) fn new(inner: Iter<'a, K, V>) -> Self {
        Self { inner }
    }
}

impl<K, V: fmt::Debug> fmt::Debug for Values<'_, K, V> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.debug_list().entries((*self).clone()).finish()
    }
}

impl<'a, K, V> Iterator for Values<'a, K, V> {
    type Item = &'a V;

    fn next(&mut self) -> Option<&'a V> {
        self.inner.next().map(|(_, v)| v)
    }

    fn size_hint(&self) -> (usize, Option<usize>) {
        self.inner.size_hint()
    }

    fn last(mut self) -> Option<&'a V> {
        self.next_back()
    }
}

impl<'a, K, V> DoubleEndedIterator for Values<'a, K, V> {
    fn next_back(&mut self) -> Option<&'a V> {
        self.inner.next_back().map(|(_, v)| v)
    }
}

impl<K, V> ExactSizeIterator for Values<'_, K, V> {
    fn len(&self) -> usize {
        self.inner.len()
    }
}

impl<K, V> FusedIterator for Values<'_, K, V> {}

impl<'a, K, V> Clone for Values<'a, K, V> {
    fn clone(&self) -> Self {
        Self {
            inner: self.inner.clone(),
        }
    }
}