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

-----Original Message----- From: boost-users-bounces@lists.boost.org on behalf of Peter Dimov Sent: Tue 1/16/2007 4:17 PM To: boost-users@lists.boost.org Subject: Re: [Boost-users] [Bind] arity of arbitrary object Sohail Somani wrote:

Hi, I've attached up something that seems to kind of maybe work in g++. Don't have access to any other compiler at the moment, so I can't tell you if it will work or if it is even conforming to standard.

No, this doesn't quite work. It says that bind( f, _5 ) has arity 1, but the correct answer is 5. Similarly, it says that bind( f, 1, 2 ) has arity 2, while the correct answer is 0. You need something like (pseudocode) arity( _bi::bind_t ) :- max( arity( e ) ) for each e in L arity( X ) :- is_placeholder<X>::value This could be much easier with a bind that uses a fusion tuple as L. :-) -------------------- Ah, you're right! Could it still be made to work using the same idea? I'm actually not sure what the bind_t type looks like when you do bind(f,_5). With you on fusion tuple :-)