Namespace pollution?

[Tomaz Stih]

I am just wondering if I use
using namespace std;
in my header .h file, does it stop at the end of header file or it pollutes every .cpp file that includes this header.

Tomaz

[Oleg Lobach]

Hi,
if you put using namespace std;in the header .h file - it pollutes every .cpp file that includes this header, as so the declarations of namespace is visible in the scope of a translation unit and #include adds *.h and *.cpp in the single translation unit.


Hope this helps,
Oleg.

[Tomaz Stih]

I guess that means that it is bad karma to include using statement in header files since there is no way to terminate the effect of it(?)

And if I declareMyClass::say_it(std::string sWord);

in header file and implement it likeusing namespace std;
MyClass::say_it(string sWord)

in my implementation file class wizard won't match the declaration and implementation of functions.

Sniff, sniff...What do to?

Sincerely,
Tomaz

[ALM]

I guess the only viable solution is to also implement it with the std:: for ClassWizard's sake, like this:

using namespace std;

MyClass::say_it(std::string sWord)
{
// But in here you can omit the std::
string sAnotherWord = sWord;
}



Cheers!
Alvaro