Re: [Boost-users] How to detect the presence of a particular type of constructor?

Thanks, that is just what i was looking for. :) Apparently that's the key point for detecting the implicit conversion constructor: template< typename From > struct does_conversion_exist { template< typename To > struct result_ { static no_type BOOST_TT_DECL _m_check(...); static yes_type BOOST_TT_DECL _m_check(To); static From _m_from; enum { value = sizeof( _m_check(_m_from) ) == sizeof(yes_type) }; }; }; Can this be extended to constructors with more than one parameter? As far as i can see, it applys only to conversion constructors.