numeric_cast, VC++ 6.0, specialization.

From: helmut.zeisel_at_[hidden]
Date: 2001-10-31 06:36:13

I want to specialize numeric_cast for a user definied class.

GCC 3.0.1 compiles the following code,
Visual C++ 6.0 says 

example_numeric_cast.cpp(20) : error C2572: 'numeric_cast' : 
redefinition of default parameter : parameter 2
example_numeric_cast.cpp(19) : see declaration of 'numeric_cast'

Is the code correct?
If yes, what is a suitable work around for VC++?

--------- Code example
#include <boost/cast.hpp>

# if defined(BOOST_MSVC) && BOOST_MSVC <= 1200 // 1200 = VC6
#  define BOOST_EXPLICIT_DEFAULT_TARGET , ::boost::type<myint>* a=0
# else
#  define BOOST_EXPLICIT_DEFAULT_TARGET
# endif

namespace boost
{

class myint
{
public:
  myint() {}
};

template<> myint numeric_cast(double arg 
BOOST_EXPLICIT_DEFAULT_TARGET)
{
  myint result;
  return result;
}
}; // namespace boost

int main()
{
  boost::myint a = boost::numeric_cast<boost::myint>(0.5);
  return 0;
}