[Boost-bugs] [Boost C++ Libraries] #12763: Provide a way to specify a default disposer

Subject: [Boost-bugs] [Boost C++ Libraries] #12763: Provide a way to specify a default disposer
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-01-16 07:19:18

#12763: Provide a way to specify a default disposer
------------------------------+--------------------------
 Reporter:  fdegros@…         |      Owner:  igaztanaga
     Type:  Feature Requests  |     Status:  new
Milestone:  To Be Determined  |  Component:  intrusive
  Version:  Boost 1.63.0      |   Severity:  Optimization
 Keywords:                    |
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 It would be convenient if there was a way to specify a default disposer to
 be applied to elements stored in an intrusive container. This would make
 it easier to write containers that take ownership of their inserted
 elements.

 This would impact the container's destructor as well as the methods
 {{{erase}}}, {{{erase_after}}}, {{{clear}}}, {{{remove}}},
 {{{remove_if}}}, {{{pop_front}}}, {{{pop_back}}}, {{{assign}}},
 {{{unique}}} and {{{clone_from}}}.

 The library should probably provide a no-op disposer, which would be the
 default one used by intrusive containers. Particular care should be taken
 in {{{clear}}} and containers' destructors in order to avoid calling the
 no-op disposer for every element.

 For example:

 {{{
 boost::intrusive::list<MyElement,
 boost::intrusive::disposer<std::default_delete<MyElement>>> elems;
 elems.insert(*new MyElement);

 // Clearing the collection deletes the elements.
 elems.clear();
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/12763>
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