Re: [boost] [type_traits][core] modularisation and moving stuff about (again)

Andrey Semashev wrote:

For noncopyable, we could convert its detection from is_base_and_derived to a dispatch based on SFINAE.

// Boost.Core class noncopyable { public: typedef void _is_boost_noncopyable; };

// Boost.TypeTraits template< typename T, typename = void > struct is_boost_noncopyable : false_type {};

template< typename T > struct is_boost_noncopyable< T, typename T::_is_boost_noncopyable > : true_type {};

This doesn't work because types derive privately from boost::noncopyable, and the trait above returns false in this case.