Function take_while

include/fplus/container_common.hpp:842–850

// take_while(is_even, [0,2,4,5,6,7,8]) == [0,2,4]
template <typename Container, typename UnaryPredicate>
Container take_while(UnaryPredicate pred, const Container& xs)
{
    internal::check_unary_predicate_for_container<UnaryPredicate, Container>();
    auto itFirst = std::find_if(
        std::begin(xs), std::end(xs), logical_not(pred));
    if (itFirst == std::end(xs))
        return xs;
    return Container(std::begin(xs), itFirst);
}

// API search type: take_last_while : ((a -> Bool), [a]) -> [a]
// fwd bind count: 1