[Boost-bugs] [Boost C++ Libraries] #2487: Calculate the mlp::and_ or mpl_or of a sequence of nullary logical metafunctions.

Subject: [Boost-bugs] [Boost C++ Libraries] #2487: Calculate the mlp::and_ or mpl_or of a sequence of nullary logical metafunctions.
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2008-11-08 22:41:28

#2487: Calculate the mlp::and_ or mpl_or of a sequence of nullary logical
metafunctions.
--------------------------------------+-------------------------------------
 Reporter:  vicente.botet_at_[hidden]  |       Owner:  agurtovoy
     Type:  Feature Requests          |      Status:  new      
Milestone:  Boost 1.38.0              |   Component:  mpl      
  Version:  Boost 1.36.0              |    Severity:  Cosmetic 
 Keywords:                            |  
--------------------------------------+-------------------------------------
 Do you think that these two metafunctions have a place in mpl?

 template <typename Seq>
 struct and_seq : boost::is_same<typename mpl::find_if<Seq,
 mpl::not_<mpl::_> >::type,
 typename mpl::end<Seq>::type>
                                  {};

 template <typename Seq>
 struct or_seq : mpl::not_<boost::is_same<typename mpl::find_if<Seq,
 mpl::_>::type,
 typename mpl::end<Seq>::type>
                                 > {};

 I have attached the code and the tests.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/2487>
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