[Boost-users] "using namespace" in template implementation files

From: Erik Thiele (erik_at_[hidden])
Date: 2004-08-05 08:27:10

hi

i don't find any docs about that issue, so i ask it here:

the usual approach to work with templates and separated
interface and implementation is as follows (i hope):

x.hpp:

template<class a> void foo(std::string xxx);
#include "x_impl.hpp"

x_impl.hpp:

template<class a> void foo(std::string xxx)
{
  string bla = xxx + "sdjkfh"; // <-- no std:: here !!!!
  cout << bla;
}

usually in normal non-template coding style i can do

using namespace std;

on the top of each .cpp file. but now i cannot do it, because it is
actually in a header file and i don't want to include another namespace
in the interface definition.

how can i solve the problem? i don't want to write "using namespace std"
at the beginning of every template function declaration, but only once
per implementation file.

cu & thx
erik

-- 
Erik Thiele