How to cast between C++/WinRT and C++/CX

casting.cpp

template <typename T>
T^ to_cx(winrt::Windows::Foundation::IUnknown const& from)
{
    return safe_cast<T^>(reinterpret_cast<Platform::Object^>(winrt::get_abi(from)));
}

template <typename T>
T from_cx(Platform::Object^ from)
{
    T to{ nullptr };
    winrt::check_hresult(reinterpret_cast<::IUnknown*>(from)->QueryInterface(winrt::put_abi(to)));
    return to;
}

namespace cx
{
    using namespace Windows::Foundation;
}

namespace winrt
{
    using namespace Windows::Foundation;
}

void sample()
{
    winrt::Uri uri(L"http://moderncpp.com/");

    cx::Uri^ uri2 = to_cx<cx::Uri>(uri);

    winrt::Uri uri3 = from_cx<winrt::Uri>(uri2);

    assert(uri == uri3); // identity
    assert(uri2->Domain == L"moderncpp.com");
    assert(uri3.Domain() == L"moderncpp.com");
}