Re: [Boost-bugs] [Boost C++ Libraries] #11032: boost::offset_ptr needs explicit ctor

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #11032: boost::offset_ptr needs explicit ctor
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-03-12 09:21:24

#11032: boost::offset_ptr needs explicit ctor
  Reporter: stheophil@… | Owner: igaztanaga
      Type: Bugs | Status: new
 Milestone: To Be Determined | Component: interprocess
   Version: Boost 1.57.0 | Severity: Problem
Resolution: | Keywords:

Comment (by stheophil@…):

 Yes, I want it to support downcasting. Sorry.

 offset_ptr<Base> pb = ...; offset_ptr<Derived>pd(pb);

 Does not have to compile because, as you say, raw pointers do not support
 this conversion, but
 offset_ptr<Base> pb = ...; offset_ptr<Derived>pd =

 should compile and by consequence

 offset_ptr<Base> pb = ...; offset_ptr<Derived>pd =

 too, which just does a static_cast if I understand correctly. Both are
 used a lot in std::list and std::map implementations of Clang and MSVC.

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