[Boost-users] [Test] redirecting unit test report

From: Kim Barrett (kab_at_[hidden])
Date: 2005-08-24 15:06:26

At 12:38 PM -0400 8/24/05, Gennadiy Rozental wrote:
>"Kim Barrett" <kab_at_[hidden]> wrote in message
>news:p06230900bf3241d57905@[192.168.161.194]...
>>  At 1:25 AM -0400 8/23/05, Gennadiy Rozental wrote:
>>>template<typename F>
>>>class global_fixure_impl : public global_fixure {
>>>      virtual void setup()    { new (m_space) F; }
>>>      virtual void teardown() { ((F*)m_space)->~F(); }
>>>
>>>      char m_space[sizeof(F)];
>>>};
>>
>>  Alignment of m_space must be appropriate for the alignment of F. I think
>>  this can be addressed by putting m_space in a union with a value whose
>>  type
>>  is the result of
>>  boost::type_with_alignment<boost::alignment_of<F>::value>::type.
>
>char m_space[sizeof(F)]; is going to be aligned properly automatically

I don't see how. See analogous discussion recently on boost developers list
under subject "alignment problem in proposed any alternative", in particular
the message from Martin Bonner on 8/11/05:
http://aspn.activestate.com/ASPN/Mail/Message/boost/2772775
Otherwise, what would be the point of boost::aligned_storage (which actually
packages up the union idiom I was suggesting be used)?