[Boost-bugs] [Boost C++ Libraries] #1992: boost::mpl::zip_view does not support use as a metafunction with ::type

Subject: [Boost-bugs] [Boost C++ Libraries] #1992: boost::mpl::zip_view does not support use as a metafunction with ::type
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2008-06-05 21:47:37

#1992: boost::mpl::zip_view does not support use as a metafunction with ::type
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 Reporter:  John Bytheway <jbytheway_at_[hidden]>  |       Owner:  agurtovoy
     Type:  Bugs                                 |      Status:  new      
Milestone:  Boost 1.36.0                         |   Component:  mpl      
  Version:  Boost 1.35.0                         |    Severity:  Problem  
 Keywords:                                       |  
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 According to the
 [http://www.boost.org/doc/libs/1_35_0/libs/mpl/doc/refmanual/zip-view.html

 zip_view documentation] (under Expression Semantics) you can use zip_view
 as a metafunction (i.e. `zip_view<seq>::type` as well as just
 `zip_view<seq>`), but this doesn't work.  The zip_view class contains no
 definition of type, so it couldn't possibly work.

 I attach an example program exhibiting the bug and a trivial patch for
 zip_view.hpp which I believe defines type appropriately, fixing the bug.

-- 
Ticket URL: <http://svn.boost.org/trac/boost/ticket/1992>
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