[Boost-users] [units] - overriding output

Subject: [Boost-users] [units] - overriding output
From: Noah Roberts (roberts.noah_at_[hidden])
Date: 2009-09-15 15:24:07

What is the correct way to override the << op for a unit so that it say 
prints "Pa" instead of "m^-1 kg s^-2"?

I tried this and no worky:

#include <boost/units/io.hpp>

namespace boost { namespace units {

template<>
inline std::string
name_string< boost::units::pressure_dimension, boost::units::si::system 
 >(const boost::units::si::pressure&)
{
   return "Pa";
}

}} // boost::units

Also, I note that the operator << in io.hpp has a comment saying 
"INTERNAL USE ONLY".  How would you suggest then that users of the 
library provide for stream output without running afoul of this 
implementation we're not meant to use?