Re: [Boost-users] Generating a large number of class member variables: PP vs mpl

Subject: Re: [Boost-users] Generating a large number of class member variables: PP vs mpl
From: Hicham Mouline (hicham_at_[hidden])
Date: 2009-01-20 05:40:01

I just realized you can instantiate fusion vector objects (forgot fusion is about runtime too)

So I have this example:

struct A {
  explicit A(int) {}
};

struct B {
  explicit B(int) {}
};

struct C {
  explicit C(int) {}
};

class Derived1 {
public:
  Derived1 () : members( A(5), B(5), C(5) ) {}
private:
  const boost::fusion::vector< A, B, C > members;
};

All members are constructed with the same argument(s) : 5

Now:
1. I may have 20 members in vector.... Is there a way not to explicitly construct them in the Derived1 ctor

2. Derived3 and Derived7 have the same vector of members. Is there a way, inside Derived3 and 7, to take the vector from Derived1?

> ----- Original Message -----
> From: "Joel Falcou" <joel.falcou_at_[hidden]>
> To: boost-users_at_[hidden]
> Subject: Re: [Boost-users] Generating a large number of class member variables: PP vs mpl
> Date: Tue, 20 Jan 2009 11:25:30 +0100
> 
> 
> Hicham Mouline a écrit :
> > But once I have my mpl::vector or fusion::vector,
> > how do i apply a meta function like for_each
> > to generate the class members automatically.
> >
> 
> fusion::vector does generate the members for you.