#ifndef BEAST_CONTAINER_AGED_CONTAINER_UTILITY_H_INCLUDED
#define BEAST_CONTAINER_AGED_CONTAINER_UTILITY_H_INCLUDED

#include <xrpl/beast/container/aged_container.h>

#include <chrono>
#include <type_traits>

namespace beast {

/** Expire aged container items past the specified age. */
template <class AgedContainer, class Rep, class Period>
typename std::enable_if<is_aged_container<AgedContainer>::value, std::size_t>::
    type
    expire(AgedContainer& c, std::chrono::duration<Rep, Period> const& age)
{
    std::size_t n(0);
    auto const expired(c.clock().now() - age);
    for (auto iter(c.chronological.cbegin());
         iter != c.chronological.cend() && iter.when() <= expired;)
    {
        iter = c.erase(iter);
        ++n;
    }
    return n;
}

}  // namespace beast

#endif