Description

Has a static const member variable value when it known that type T can or can't be reflected using Boost.PFR; otherwise, there is no member variable. Every user may(and in some difficult cases - should) specialize is_reflectable on his own.

Example:

namespace pfr {
    template<class All> struct is_reflectable<A, All> : std::false_type {};       // 'A' won't be interpreted as reflectable everywhere
    template<> struct is_reflectable<B, boost_fusion_tag> : std::false_type {};   // 'B' won't be interpreted as reflectable in only Boost Fusion
}}

	Note
	is_reflectable affects is_implicitly_reflectable, the decision made by is_reflectable has more priority than is_implicitly_reflectable, because is_reflectable is more sharp than is_implicitly_reflectable