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

Subject: Re: [Boost-users] How to detect the presence of a particular type of constructor?
From: Siegfried Kettlitz (siegfried.kettlitz_at_[hidden])
Date: 2009-04-25 07:36:08

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.