RE: [boost] [Review] Boost Graphs Library (GGCL)

From: jsiek_at_[hidden]
Date: 2000-08-30 15:22:09

Gary Powell writes:
 > The problem is you can't add new versions of container_gen<> to the
 > namespace "std", if you can shoe horn in the container into the ggcl format
 > it works, otherwise its prohibited.
 > 
 > namespace std {
 > template<class Selector, // no problem,
 >          class value_type, // no problem here,
 >          class allocator> // opps! new option,
 > struct container_gen<> {};
 > 
 > };

Actually, there's a way to get around this by templating
the selector:

template <class Allocator>
struct garys_containerS { };

template <class Allocator, class T>
struct container_gen< garys_containerS<Allocator>, T>
{
  typedef garys_container<T, Allocator> type;
};

 > The more I look at this, the more I think you should just take the container
 > as the template class argument instead of this extra key_struct type.

The problem with this is that the value_type that will go into the container is
really an implementation detail that the user shouldn't have to know
about.

Cheers,

Jeremy