reverse_container_view.h

#pragma once

#include "memory.h"

BEGIN_NAMESPACE_MEMORY

template <typename T, bool CopyValue = !std::is_lvalue_reference_v<T>>
struct ReverseContainerView;

template <typename T>
struct ReverseContainerView<T, false>
{
    explicit ReverseContainerView(T& container)
        : container(container)
    {
    }

    auto begin()
    {
        return container.rbegin();
    }

    auto end()
    {
        return container.rend();
    }
protected:
    T& container;
};

template <typename T>
struct ReverseContainerView<T, true>
{
    explicit ReverseContainerView(T container)
        : container(std::move(container))
    {
    }

    auto begin()
    {
        return container.rbegin();
    }

    auto end()
    {
        return container.rend();
    }
protected:
    const T container;
};

template <typename Container>
explicit ReverseContainerView(Container&& container) -> ReverseContainerView<Container>;

END_NAMESPACE_MEMORY