[Boost-users] boost::variant construction,assignment

Subject: [Boost-users] boost::variant construction,assignment
From: Hicham Mouline (hicham_at_[hidden])
Date: 2008-10-09 12:56:49

hello,

class parameters {
public:
 parameters();
 ~parameters();

 const R& getR() const;
 void setR(const R& rhs);

 const V& getV() const;
 void setV(const V& rhs);
private:
 const R* r_;
 const V* v_;
};

R and V are typedefs of variant<>.

I have chosen to make the private members r_ and v_ as pointers to allow for r_=0 and v_=0
(is this a "never do this" thing?).

R setter is implemented like this:
void parameters::setR(const R& rhs) {
  if (!r_)
    r_ = new R( rhs );
  else 
    *r_ = rhs;
}

then
~parameters()
{
 if (r_)
   delete r_;
}

There is no operator= for variant<> it seems?

regards,