Function construct_node_pair

src/config/implementation.hpp:1687–1701

// constructor for std::piece_construct with std::tuple.
template <typename Alloc, typename Key>
inline typename boost::unordered::detail::allocator_traits<Alloc>::pointer
construct_node_pair(Alloc& alloc, BOOST_FWD_REF(Key) k)
{
    node_constructor<Alloc> a(alloc);
    a.create_node();
    boost::unordered::detail::func::call_construct(
        alloc, boost::unordered::detail::func::const_cast_pointer(
                   boost::addressof(a.node_->value_ptr()->first)),
        boost::forward<Key>(k));
    BOOST_TRY
    {
        boost::unordered::detail::func::call_construct(
            alloc, boost::unordered::detail::func::const_cast_pointer(
                       boost::addressof(a.node_->value_ptr()->second)));
    }
    BOOST_CATCH(...)
    {
        boost::unordered::detail::func::call_destroy(