Re: [Boost-users] [Bind] arity of arbitrary object

Chris Uzdavinis wrote:

On 1/16/07, Sohail Somani wrote:

...

Ok the incomplete type was because there was no specialization of _bi::value<T> which occurs when the user actually supplies a value. Does this solve the problem then?

Thanks, that is pretty clever! I was, however, holding onto a little hope that the solution would have been a little easier or straight-forward. Utilizing implementation details like that makes me simultaneously smile and cringe. Watching this discussion unfold has been rather enlightening. My thanks to you and Peter.

Any possibility that the Bind library could make this available as part of its documented interface, or were there reasons for its omission?

A proper way to provide this functionality would be to expose R,F,L as result_type (already done), function_type and argument_list_type, then make _bi::listN<> a conforming MPL (fusion?) sequence. One reason for not extending boost::bind further is that the extensions won't necessarily make their way into tr1::bind or std::bind. It's not clear whether this should stop us, of course.