boost type erasure

gistfile1.cpp

#include <boost/type_erasure/any.hpp>
#include <boost/type_erasure/member.hpp>
#include <boost/mpl/vector.hpp>

BOOST_TYPE_ERASURE_MEMBER((has_init), init, 0)
BOOST_TYPE_ERASURE_MEMBER((has_loadIntoTexture), loadIntoTexture, 1)

using _self = boost::type_erasure::_self;

using initiable_concept = has_init<void(), _self>;
using loader_concept = has_loadIntoTexture<void(shared_ptr<AVFrame>), _self>;

using frame_loader_requirement = boost::mpl::vector<
    initiable_concept,
    loader_concept
>;

using any_frame_loader = boost::type_erasure::any<frame_loader_requirement, const _self&>;