How do I specify default non-template argument initializers in a c++ function template?

Question

EDIT: See my own answer to this question for details. It turns out to be an Eclipse Juno bug, not a C++ problem. Nonetheless, the question still covers a useful topic for other C++ template users.

If I wish to create a template class with an argument of "template" type and other arguments of "non-temlate" types, may I.how do I specify this?

Example: An implementation or itoa() but with multiple types, padding and returning a string...

EDIT: fixed var names in definition.

   template <typename T>   std::string    Num2Str( T x, char pad = ' ', int width = 0 );
   template <typename T>   std::string    Num2Str( T x, char pad, int width )
   {
      static std::string   string;
      std::stringstream    ss;
      ss << std::setfill(pad) << std::setw(width) << x;
      string = ss.str();
      return string;
   }

EDIT: This should work across compilers/platforms, g++, VC++.

Answer 1

I think you're mixing up template params and function params. Why not just this:

#include <sstream>
#include <iomanip>

template <typename T>   
std::string Num2Str( T x, char pad = ' ', int width = 0 )
{
    static std::string   string;
    std::stringstream    ss;
    ss << std::setfill(pad) << std::setw(width) << x;
    string = ss.str();
    return string;
}

void Test()
{
    auto s1 = Num2Str( 1.0 );
    auto s2 = Num2Str( 2, '-' );
    auto s3 = Num2Str( 3.0, ' ', 3 );
}