Re: [Boost-bugs] [Boost C++ Libraries] #5806: Property tree supporting custom allocators such as the boost pool ones

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #5806: Property tree supporting custom allocators such as the boost pool ones
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-08-23 12:36:49

#5806: Property tree supporting custom allocators such as the boost pool ones
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  Reporter:  vivien.millet@…          |       Owner:  kaalus                        
      Type:  Feature Requests         |      Status:  new                           
 Milestone:  To Be Determined         |   Component:  property_tree                 
   Version:  Boost 1.47.0             |    Severity:  Problem                       
Resolution:                           |    Keywords:  property tree custom allocator
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Comment (by vivien.millet@…):

 I don't get it :) how can it be penalizing if the user can choose it's own
 allocator through template instanciation like STL does, which can be
 either stateless or stateful ones (eventually providing a default one if
 user don't provide it) ?

 I've seen in the ptree_implementation.hpp somewhere in the constructors :

 : m_Children(new typename subs::base_container).

 Correct me if i'm wrong but is this couldn't be replaced by :

 m_Children = _Alloc::rebind<typename
 subs::base_container>::other::allocate();

 new (m_Children) typename subs::base_container;

 "_Alloc" being the template argument we add to

 basic_ptree<class K,class D,class Comp,class _Alloc =
 std::allocator<any_type_since_we_use_rebind>>

 regards.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5806#comment:2>
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