[Boost-bugs] [Boost C++ Libraries] #9760: coroutine's iterators don't have == operator with const qualifier

Subject: [Boost-bugs] [Boost C++ Libraries] #9760: coroutine's iterators don't have == operator with const qualifier
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-03-09 12:39:59

#9760: coroutine's iterators don't have == operator with const qualifier
-----------------------------------------------+-----------------------
 Reporter:  Masahiro Nawata <kamo.tanabota@…>  |      Owner:  olli
     Type:  Bugs                               |     Status:  new
Milestone:  To Be Determined                   |  Component:  coroutine
  Version:  Boost 1.55.0                       |   Severity:  Problem
 Keywords:                                     |
-----------------------------------------------+-----------------------
 coroutine's iterators don't have operator== with const qualifier.
 Therefore, the following code fails to compile:
 {{{
 #include <boost/coroutine/v2/coroutine.hpp>
 #include <boost/range/adaptor/filtered.hpp>
 #include <boost/range/iterator_range.hpp>
 #include <iostream>

 int main()
 {
         using namespace boost;
         coroutines::coroutine<int>::pull_type
 c([](coroutines::coroutine<int>::push_type& yield) {
                 for (int i = 0; i < 5; ++i) {
                         yield(i);
                 }
         });
         auto crange = make_iterator_range(begin(c), end(c));
         for (auto n : crange
             | adaptors::filtered([](int n){return n % 2 == 0;})) // the
 filtered adaptor needs const operator==.
         {
                 std::cout << n << std::endl;
         }
 }
 }}}
 In addition, the iterators don't also have const operator!=.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9760>
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