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    //! Parallel iterator types for [standard collections][std::collections]
    //!
    //! You will rarely need to interact with this module directly unless you need
    //! to name one of the iterator types.
    //!
    //! [std::collections]: https://doc.rust-lang.org/stable/std/collections/

    /// Convert an iterable collection into a parallel iterator by first
    /// collecting into a temporary `Vec`, then iterating that.
    macro_rules! into_par_vec {
        ($t:ty => $iter:ident<$($i:tt),*>, impl $($args:tt)*) => {
            impl $($args)* IntoParallelIterator for $t {
                type Item = <$t as IntoIterator>::Item;
                type Iter = $iter<$($i),*>;

                fn into_par_iter(self) -> Self::Iter {
                    use std::iter::FromIterator;
                    $iter { inner: Vec::from_iter(self).into_par_iter() }
                }
            }
        };
    }

    pub mod binary_heap;
    pub mod btree_map;
    pub mod btree_set;
    pub mod hash_map;
    pub mod hash_set;
    pub mod linked_list;
    pub mod vec_deque;

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