On 11/22/2012 11:31 AM, Jeffrey Lee Hellrung, Jr. wrote:
Maybe this is what you did, so I might not be suggesting something new, but... Perhaps boost::result_of could have an extra conditional logic branch added to it: - If F::result_type exists, return F::result_type; - Else: - If BOOST_NO_CXX11_DECLTYPE, return F::result< F ( Args... ) > - Else, if F::result<> exists, return F::result< F ( Args... ) > - Else return decltype( declval<F>() ( declval< Args >()... ) )
C++11 defines exactly what result_of does, as did the TR1 spec before it. Making boost::result_of do something different would be surprising, IMO. If you want to use C++11 lambdas with boost::result_of, the most portable solution is with an adapter, as has been suggested elsewhere in this thread. Not ideal, but it works. -- Eric Niebler BoostPro Computing http://www.boostpro.com