id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
6119,output streams not working with units,Noel Belcourt,Matthias Schabel,"Compiling the temperature.cpp example problems fails with this error message 

S896822:example kbelco$ icpc -g -I ../../.. temperature.cpp 
../../../boost/units/io.hpp(967): error: more than one instance of overloaded function ""boost::units::detail::do_print_prefixed"" matches the argument list:
            function template ""void boost::units::detail::do_print_prefixed<Prefixes,CharT,Traits,Dimension,L,Scale,T>(std::basic_ostream<_CharT, _Traits> &, const boost::units::quantity<boost::units::unit<Dimension, boost::units::heterogeneous_system<boost::units::heterogeneous_system_impl<L, Dimension, Scale>>, void>, T> &)""
            function template ""void boost::units::detail::do_print_prefixed<Prefixes,CharT,Traits,Dimension,System,T>(std::basic_ostream<_CharT, _Traits> &, const boost::units::quantity<boost::units::unit<Dimension, System, void>, T> &)""
            function template ""void boost::units::detail::do_print_prefixed<Prefixes,CharT,Traits,Unit,T>(std::basic_ostream<_CharT, _Traits> &, const boost::units::quantity<Unit, T> &)""
            argument types are: (std::basic_ostream<char, std::char_traits<char>>, const boost::units::quantity<boost::units::fahrenheit::temperature, double>)
      detail::do_print_prefixed<Prefixes>(os, q);
      ^
          detected during:
            instantiation of ""void boost::units::detail::maybe_print_prefixed<Prefixes,CharT,Traits,Unit,T>(std::basic_ostream<_CharT, _Traits> &, const boost::units::quantity<Unit, T> &, boost::mpl::true_) [with Prefixes=boost::units::detail::engineering_prefixes, CharT=char, Traits=std::char_traits<char>, Unit=boost::units::fahrenheit::temperature, T=double]"" at line 1050
            instantiation of ""std::basic_ostream<_CharT, _Traits> &boost::units::operator<<(std::basic_ostream<_CharT, _Traits> &, const boost::units::quantity<Unit2, T2> &) [with Char=char, Traits=std::char_traits<char>, Unit=boost::units::fahrenheit::temperature, T=double]"" at line 92 of ""temperature.cpp""

The same message occurs with a small reproducer.

#include <iostream>
#include <boost/units/io.hpp>
#include <boost/units/quantity.hpp>
#include <boost/units/systems/temperature/fahrenheit.hpp>

int main(int, char **) {
  using namespace boost::units;
  quantity<fahrenheit::temperature> t;
  cout << t << endl;
  return 0;
}
",Bugs,closed,To Be Determined,units,Boost Development Trunk,Problem,wontfix,,