On Wed, 02 Sep 2009 04:11:12 -0500, Domagoj Saric <domagoj.saric@littleendian.com> wrote:
there was a somewhat related discussion ( http://lists.boost.org/Archives/boost/2004/02/61582.php ) dealing, among other things, with the problem of default construction in mpl::for_each ... in the current implementation you must either pay for default construction or pay for added verbosity/ugliness of the "wrap" approach... ...i must admit i did not quite understand the argument of Aleksey Gurtovoy that the proposed "aux::unwrap(f, 0)::operator()<arg>()" solution would "would rule out ordinary function objects" (can you even use them with mpl::for_each?)
Yep. I provided an example in the message you are referring to above: typedef mpl::range_c<int,0,10> numbers; std::vector<int> v; mpl::for_each<numbers,mpl::_>( boost::bind(push_back, &v, _1) );
and that "it's not portable" (the ::operator()<arg>() syntax is not standard?)...
Standard != portable in practice. -- Aleksey Gurtovoy MetaCommunications Engineering