use ;
/// Generates all [`Option`]s except `None`, with values from a given iterator.
///
/// This `struct` is created by [`exhaustive_somes`]; see its documentation for more.
/// Generates all [`Option`]s except `None`, with values from a given iterator.
///
/// The elements of the given iterator are wrapped in `Some` and generated in the original order.
///
/// The output length is `xs.count()`.
///
/// # Examples
/// ```
/// extern crate itertools;
///
/// use itertools::Itertools;
/// use malachite_base::options::exhaustive::exhaustive_somes;
///
/// assert_eq!(
/// exhaustive_somes([1, 2, 3].iter().cloned()).collect_vec(),
/// &[Some(1), Some(2), Some(3)]
/// );
/// ```
pub const
/// Generates all [`Option`]s with values from a given iterator.
///
/// `None` comes first, followed by the elements of the given iterator wrapped in `Some`.
///
/// The output length is `xs.count()`.
///
/// # Examples
/// ```
/// extern crate itertools;
///
/// use itertools::Itertools;
/// use malachite_base::options::exhaustive::exhaustive_options;
///
/// assert_eq!(
/// exhaustive_options([1, 2, 3].iter().cloned()).collect_vec(),
/// &[None, Some(1), Some(2), Some(3)]
/// );
/// ```