layers.hpp

// Approach used in DIOS
class Base {};

template < typename Next >
class FatureA: public < Next > {};

template < typename Next >
class FeatureB: public < Next > {};

using MyType = FeatureB < FeatureA < FeatureB< Base > >;

// Alternative
template< template < typename > typename... Features >
class Base: public Features< Base < Features... > >... {};

template < typename Self >
class FatureA {
    CRTP_SELF();
  
    // Access other components via self().something
};

template < typename Self >
class FatureB {
    CRTP_SELF();
  
    // Access other components via self().something
};

using MyType = Base< FeatureA, FeatureB >;