[Boost-bugs] [Boost C++ Libraries] #4796: Empty shared_ptr_nmt returns use_count() = 1

Subject: [Boost-bugs] [Boost C++ Libraries] #4796: Empty shared_ptr_nmt returns use_count() = 1
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-10-27 10:45:31

#4796: Empty shared_ptr_nmt returns use_count() = 1
-----------------------------------------------+----------------------------
 Reporter:  B van den Hout <smork1@…>          |       Owner:  pdimov   
     Type:  Bugs                               |      Status:  new      
Milestone:  To Be Determined                   |   Component:  smart_ptr
  Version:  Boost 1.44.0                       |    Severity:  Problem  
 Keywords:                                     |  
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 If you construct an empty shared_ptr, the use_count() method will return
 0. This is indicated in the documentation as "Postconditions: use_count()
 == 0 && get() == 0."

 If I look at the implementation in
 boost/smart_ptr/detail/shared_ptr_nmt.hpp, the default constructed
 shared_ptr will create a count_type(1). That means that use_count() will
 return 1 even if I construct it without any initial value. This is
 inconsistent IMHO.

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/4796>
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