Re: [Boost-bugs] [Boost C++ Libraries] #11229: vector incorrectly copies move-only objects using memcpy

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #11229: vector incorrectly copies move-only objects using memcpy
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-12-02 13:35:32

#11229: vector incorrectly copies move-only objects using memcpy
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  Reporter:  joseph.thomson@…  |      Owner:  igaztanaga
      Type:  Bugs              |     Status:  new
 Milestone:  To Be Determined  |  Component:  move
   Version:  Boost 1.58.0      |   Severity:  Problem
Resolution:                    |   Keywords:
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Comment (by joseph.thomson@…):

 Replying to [comment:7 anonymous]:
 > Note that more recent GCC versions have `__is_trivially_copyable` as an
 intrinsic, which correctly marks a unique_ptr as not being trivially
 copyable (the difference with `__has_trivial_copy`) seems to be that the
 newer intrinsic does take the requirement of a non-trivial destructor into
 account).

 A trivially copyable class must have:

 * No non-trivial copy constructors
 * No non-trivial copy assignment operators
 * No non-trivial move constructors
 * No non-trivial move assignment operators
 * A trivial destructor

 `__has_trivial_copy` simply reports whether the class has a trivial copy
 constructor.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11229#comment:8>
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