make_handle

make_handle.h

// version 1.0
template<class T, class D>
inline auto make_handle(T* p, D&& d) noexcept(std::is_nothrow_constructible<typename std::decay<D>::type, D&&>::value)
-> std::unique_ptr<T, typename std::decay<D>::type>
{
    return {p, std::forward<D>(d)};
}

auto h1 = make_handle(fopen("test", "r"), fclose);
auto h2 = make_handle(dlopen("bla"), dlclose);

// Lambda is fine as well:
auto h3 = make_handle(dlopen("bla"), [](void *p) { dlclose(p); });

// Capturing lambda is fine as well
auto h4 = make_handle(fopen("test", "r"), [&](FILE *f) {
    ...
    fclose(f);
});