is_partitioned.h

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#pragma once
 
#include "di/container/algorithm/find_if.h"
#include "di/container/algorithm/find_if_not.h"
 
namespace di::container {
namespace detail {
    struct IsPartitionedFunction {
        template<concepts::InputIterator It, concepts::SentinelFor<It> Sent, typename Proj = function::Identity,
                 concepts::IndirectUnaryPredicate<meta::Projected<It, Proj>> Pred>
        constexpr auto operator()(It first, Sent last, Pred pred, Proj proj = {}) const -> bool {
            auto mid = container::find_if_not(util::move(first), last, util::ref(pred), util::ref(proj));
            return container::find_if(util::move(mid), last, util::ref(pred), util::ref(proj)) == last;
        }
        constexpr auto operator()(It first, Sent last, Pred pred, Proj proj = {}) const -> bool {…}
 
        template<concepts::InputContainer Con, typename Proj = function::Identity,
                 concepts::IndirectUnaryPredicate<meta::Projected<meta::ContainerIterator<Con>, Proj>> Pred>
        constexpr auto operator()(Con&& container, Pred pred, Proj proj = {}) const -> bool {
            return (*this)(container::begin(container), container::end(container), util::ref(pred), util::ref(proj));
        }
        constexpr auto operator()(Con&& container, Pred pred, Proj proj = {}) const -> bool {…}
    };
    struct IsPartitionedFunction {…};
}
 
constexpr inline auto is_partitioned = detail::IsPartitionedFunction {};
}
 
namespace di {
using container::is_partitioned;
}