[Boost-users] [units] Unable to print temperature quantity

Subject: [Boost-users] [units] Unable to print temperature quantity
From: Belcourt, K. Noel (kbelco_at_[hidden])
Date: 2011-11-12 00:55:04

Hi,

I'm a complete neophyte with the units library.  I have cause to use  
it so I'm trying to do something simple and am getting compile  
problems.  This code:

#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;
  std::cout << t << std::endl;
  return 0;
}

Generates this error with Intel 11.1 on Darwin using trunk.

/Users/kbelco/boost/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,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 14 of "/ 
Users/kbelco/core_simulator/test/integration/main_test_5.cpp"

Any ideas what I'm doing wrong?

Thanks.

-- Noel Belcourt