Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Header <boost/pool/poolfwd.hpp>

Forward declarations of all public (non-implemention) classes.

namespace boost {
  template<typename T, typename UserAllocator, typename Mutex, 
           unsigned NextSize, unsigned MaxSize> 
    class fast_pool_allocator;
  template<typename T, typename UserAllocator> class object_pool;
  template<typename UserAllocator> class pool;
  template<typename T, typename UserAllocator, typename Mutex, 
           unsigned NextSize, unsigned MaxSize> 
    class pool_allocator;
}