[Boost-bugs] [Boost C++ Libraries] #8327: iostream header and std::cout in hpp files must be removed.

Subject: [Boost-bugs] [Boost C++ Libraries] #8327: iostream header and std::cout in hpp files must be removed.
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-03-23 10:36:49

#8327: iostream header and std::cout in hpp files must be removed.
------------------------------+---------------------------------------------
 Reporter:  pjtsu             |       Owner:  johnmaddock
     Type:  Support Requests  |      Status:  new        
Milestone:  To Be Determined  |   Component:  math       
  Version:  Boost 1.53.0      |    Severity:  Problem    
 Keywords:                    |  
------------------------------+---------------------------------------------
 I think that direct including iostream header and ostream instance like
 cout, cerr or so must be deprecated.

 Reasons
 * to support environment which ostream is forbidden like embedded systems.
 * to entrust output type to library user.
 Alternative plan is to replace ostream instance to template-type as
 below.[[BR]]
 - before
 {{{#!c
 template <typename Iter>
 void PrintTest(Iter first, Iter last)
 {
         std::cout << std::distance(first, last) << ": ( ";
         for (Iter iter = first; iter != last; ++iter) {
                 std::cout << *iter << " ";
         }
         std::cout << ")" << std::endl;
 }
 }}}
 - after
 {{{#!c
 template <typename Stream, typename Iter>
 void PrintTest(Stream& ostr, Iter first, Iter last)
 {
         ostr << std::distance(first, last) << ": ( ";
         for (Iter iter = first; iter != last; ++iter) {
                 ostr << *iter << " ";
         }
         ostr << ")" << std::endl;
 }
 }}}
 - Even if ostream header is not included, std::distance() and std::endl
 are ignored until !PrintTest() is substantialized.

 Subject
 * boost/algorithm/searching/detail/debugging.hpp
 * boost/graph/graph_utility.hpp
 * boost/math/constants/generate.hpp
 * boost/pending/relaxed_heap.hpp
 * or so ...

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8327>
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