[Boost-bugs] [Boost C++ Libraries] #7546: time_point<system_clock> output version 2 fails to compile

Subject: [Boost-bugs] [Boost C++ Libraries] #7546: time_point<system_clock> output version 2 fails to compile
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-10-21 16:57:59

#7546: time_point<system_clock> output version 2 fails to compile
------------------------------+---------------------------------------------
 Reporter:  viboes            |       Owner:  viboes     
     Type:  Bugs              |      Status:  new        
Milestone:  To Be Determined  |   Component:  chrono     
  Version:  Boost 1.51.0      |    Severity:  Showstopper
 Keywords:                    |  
------------------------------+---------------------------------------------
 Unfortunately I had commented the test for time_point<system_clock> and
 while uncommenting it there is a severe compile error.

 {{{
 clang-darwin.compile.c++
 ../../../bin.v2/libs/chrono/test/time_point_output_h.test/clang-
 darwin-3.1x/debug/io/time_point_output.o
 In file included from io/time_point_output.cpp:5:
 In file included from ../../../boost/chrono/chrono_io.hpp:26:
 ../../../boost/chrono/io/time_point_io.hpp:415:46: error: no viable
 conversion from 'const time_point<boost::chrono::system_clock,
 boost::chrono::duration<long long, boost::ratio<1, 30> > >' to 'const
 time_point' (aka 'const time_point<boost::chrono::system_clock>')
           time_t t = system_clock::to_time_t(tp);
                                              ^~
 io/time_point_output.cpp:17:7: note: in instantiation of function template
 specialization 'boost::chrono::operator<<<char, std::char_traits<char>,
 boost::chrono::duration<long long, boost::ratio<1, 30> > >' requested here
   out << tp;
       ^
 io/time_point_output.cpp:69:3: note: in instantiation of function template
 specialization 'test_good_prefix<boost::chrono::system_clock,
 boost::chrono::duration<long long, boost::ratio<1, 30> > >' requested here
   test_good_prefix<Clock> ("2 [1/30]seconds",
 duration<boost::int_least64_t, ratio<1, 30> > (2));
   ^
 io/time_point_output.cpp:94:3: note: in instantiation of function template
 specialization 'check_all<boost::chrono::system_clock>' requested here
   check_all<boost::chrono::system_clock>();
   ^
 ../../../boost/chrono/time_point.hpp:156:11: note: candidate constructor
 (the implicit copy constructor) not viable: no known conversion from
 'const time_point<boost::chrono::system_clock,
 boost::chrono::duration<long long, boost::ratio<1, 30> > >' to 'const
 boost::chrono::time_point<boost::chrono::system_clock,
 boost::chrono::duration<long long, boost::ratio<1, 1000000000> > > &' for
 1st argument;
     class time_point
           ^
 ../../../boost/chrono/time_point.hpp:181:9: note: candidate template
 ignored: substitution failure [with Duration2 =
 boost::chrono::duration<long long, boost::ratio<1, 30> >]
         time_point(const time_point<clock, Duration2>& t
         ^
 ../../../boost/chrono/detail/inlined/mac/chrono.hpp:53:43: note: passing
 argument to parameter 't' here
 system_clock::to_time_t(const time_point& t) BOOST_NOEXCEPT
                                           ^
 1 error generated.

     "/Users/viboes/clang/clang+llvm-3.1-x86_64-apple-darwin11/bin/clang++"
 -x c++ -std=c++11 -O0 -g -Wextra -Wno-long-long -pedantic -O0 -fno-inline
 -Wall -pedantic -g -DBOOST_ALL_NO_LIB=1 -DBOOST_CHRONO_HEADER_ONLY
 -DBOOST_CHRONO_USES_MPL_ASSERT -DBOOST_CHRONO_VERSION=2
 -DBOOST_ERROR_CODE_HEADER_ONLY -DBOOST_SYSTEM_NO_DEPRECATED -I"../../.."
 -c -o "../../../bin.v2/libs/chrono/test/time_point_output_h.test/clang-
 darwin-3.1x/debug/io/time_point_output.o" "io/time_point_output.cpp"


 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7546>
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