Re: [Boost-users] boost:any/boost::variant for integral/floating type

Subject: Re: [Boost-users] boost:any/boost::variant for integral/floating type
From: Igor R (boost.lists_at_[hidden])
Date: 2010-06-01 09:31:49

> Â struct get_min_visitor
> Â  Â : public boost::static_visitor<>
> Â  Â {
> Â  Â template <typename T>
> Â  Â  Â T operator()(T & i) const
> Â  Â  Â  Â {
> Â  Â  Â  Â return std::numeric_limits<T>::min();
> Â  Â  Â  Â }
> Â  Â };

You have to pass the result type as an argument to static_visitor
template. Maybe you meant something like this:

  //...
  AttributeValue(int i) : Value(i)
  {}
  AttributeValue(double d) : Value(d)
  {}
  // etc...

 struct get_min_visitor : public boost::static_visitor<AttributeValue>
 {
   template <typename T>
   AttributeValue operator()(const T &) const
   {
     return std::numeric_limits<T>::min();
   }
 };