Perhaps I'm misunderstanding or oversimplifying, but doesn't this work? template<class A, class B, class C> class Pipeline { public: Pipeline(A & a, B & b, C & c) : a_(a), b_(b), c_(c) { } public: template<class ARG> void operator()(ARG starting_val) { c_( b_( a_(starting_val) ) ); } private: A & a_; B & b_; C & c_; }; { A a; B b; C c; Pipeline<A,B,C> p(a,b,c); ... ... ... int arg(10); p(arg); } On 11/3/06, Fernando Cacciola <fernando_cacciola@hotmail.com> wrote:
Hi people
3 years of C# programming is eroding my metaprogramming habilities :(
Say I have a few arbitrary function objects:
A a ; B b ; C c ;
I can easily pipe them together using Boost.Bind:
bind(a, bind(b, bind(c,_1) ) )(some_starting_value);
But how do I create such a composed functor programatically from an arbitrary tuple of function objects, as in tuple<A,B,C>?
The idea is to present to the user a simple interface were he pass just a tuple of functors and I do the magic of turning them into a pipe.