boost::optional
can be initialized with a non-copyable type by using in-place factories.
Specifically, you can use them like this:
#include <boost/optional.hpp>
#include <boost/utility/in_place_factory.hpp>
class MyType : private boost::noncopyable
{
public:
MyType(T1 const& arg1, T2 const& arg2);
}
...
boost::optional<MyType> m_var;
...
m_var = boost::in_place(arg1, arg2);
...
In C++14 there is a proposed std::make_optional
that would be a better solution to this problem. However, this has not been implemented in Boost.Optional.