[Boost-bugs] [Boost C++ Libraries] #10834: ptr_array cannot be used with boost::nullable<T> as type parameter

Subject: [Boost-bugs] [Boost C++ Libraries] #10834: ptr_array cannot be used with boost::nullable<T> as type parameter
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-12-02 09:45:51

#10834: ptr_array cannot be used with boost::nullable<T> as type parameter
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 Reporter:  florian.schmid1978@…  |      Owner:  nesotto
     Type:  Bugs                  |     Status:  new
Milestone:  To Be Determined      |  Component:  ptr_container
  Version:  Boost 1.57.0          |   Severity:  Problem
 Keywords:                        |
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 The copy constructor of ptr_array uses operator[] to access the elements
 of the ptr_array to copy.[[BR]]
 Problem one: It is not save to call ptr_array[i] if element i is
 null.[[BR]]
 Problem two: Operator[] returns a reference to remove_nullable<T>::type.
 The address of this object is then casted to const T*, which fails with
 compilation error C2664 if T=nullable<X>, because X* cannot be casted to
 nullable<X>*.

 Reproduction: compile attached test.cpp[[BR]]
 Possible fix: see attached patch[[BR]]
 [[BR]]
 Regards,
 Florian

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/10834>
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