Re: [Boost-users] [Fusion] fusion vector transformation into another fusion vector transformation.

5 Oct 2010


      On 10/6/10 6:10 AM, alfC wrote:
...
I have class that is parameterized by several type (Boost::Unit units
type).
template
class A{
   A(quantity<U1>  q1, quantity<U2>  q2, ... ){}
};
since the number of arguments is arbitrary I though it would be a good
idea to use either MPL sequence and Tuples. Or better yet a
fusion::vector.
so the class will be parametrized by a fusion::vector or unit types.
template<class FusionOfUnits>  //or class MPLofUnits
class A{
  A(FusionOfQuantities fq){}  //or TupleOfUnits
};
The questions is: ¿what is the best way to transform a
fusion::vector
into a
fusion::vector
whete the N is (compile-time) arbitrary, i.e. the lenght of the fist
fusion::vector is arbitrary
(If you are not familiar with Boost.Units, unitN is just a type and
quantity is a template type.)
Have you tried fusion::transform? Or fusion::transform_view?

Regards,
-- 
Joel de Guzman
http://www.boostpro.com
http://spirit.sf.net