// Copyright 2011 Daniel James.
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

#include "../objects/test.hpp"
#include <boost/detail/lightweight_test.hpp>
#include <boost/static_assert.hpp>
#include <boost/type_traits/is_same.hpp>
#include <boost/unordered/detail/implementation.hpp>

template <class Tp> struct SimpleAllocator
{
    typedef Tp value_type;

    SimpleAllocator() {}

    template <class T> SimpleAllocator(const SimpleAllocator<T>&) {}

    Tp* allocate(std::size_t n)
    {
        return static_cast<Tp*>(::operator new(n * sizeof(Tp)));
    }

    void deallocate(Tp* p, std::size_t) { ::operator delete((void*)p); }
};

template <typename T> void test_simple_allocator()
{
    test::check_instances check_;

    typedef boost::unordered::detail::allocator_traits<SimpleAllocator<T> >
        traits;

    BOOST_STATIC_ASSERT((boost::is_same<typename traits::allocator_type,
        SimpleAllocator<T> >::value));

    BOOST_STATIC_ASSERT(
        (boost::is_same<typename traits::value_type, T>::value));

    BOOST_STATIC_ASSERT((boost::is_same<typename traits::pointer, T*>::value));
    BOOST_STATIC_ASSERT(
        (boost::is_same<typename traits::const_pointer, T const*>::value));
    // BOOST_STATIC_ASSERT((boost::is_same<typename traits::void_pointer, void*
    // >::value));
    // BOOST_STATIC_ASSERT((boost::is_same<typename traits::const_void_pointer,
    // void const*>::value));

    BOOST_STATIC_ASSERT((boost::is_same<typename traits::difference_type,
        std::ptrdiff_t>::value));

#if BOOST_UNORDERED_USE_ALLOCATOR_TRAITS == 1
    BOOST_STATIC_ASSERT((boost::is_same<typename traits::size_type,
        std::make_unsigned<std::ptrdiff_t>::type>::value));
#else
    BOOST_STATIC_ASSERT(
        (boost::is_same<typename traits::size_type, std::size_t>::value));
#endif

    BOOST_TEST(!traits::propagate_on_container_copy_assignment::value);
    BOOST_TEST(!traits::propagate_on_container_move_assignment::value);
    BOOST_TEST(!traits::propagate_on_container_swap::value);

    // rebind_alloc
    // rebind_traits

    SimpleAllocator<T> a;

    T* ptr1 = traits::allocate(a, 1);
    // T* ptr2 = traits::allocate(a, 1, static_cast<void const*>(ptr1));

    traits::construct(a, ptr1, T(10));
    // traits::construct(a, ptr2, T(30), ptr1);

    BOOST_TEST(*ptr1 == T(10));
    // BOOST_TEST(*ptr2 == T(30));

    traits::destroy(a, ptr1);
    // traits::destroy(a, ptr2);

    // traits::deallocate(a, ptr2, 1);
    traits::deallocate(a, ptr1, 1);

    traits::max_size(a);
}

int main()
{
    test_simple_allocator<int>();
    test_simple_allocator<test::object>();

    return boost::report_errors();
}