Using -keyword

[HenriK]

Hi, it´s me again and I have a question about using -keyword and here it is: Is there any different functionality with this keyword than this:

using namespace std;

Should be self-explanatory what this one does, but I´d find it odd if this would be the only functionality using-keyword has. I´ve heard adding new keywords to C++ is not a very welcome thing and that leaves me just wondering this. Any further information about this keyword?

[Bazzy]

with a similar meaning: using std::cout;
Or when you specify in that you want to use a base function in a derived class: using Base::function;

[Duthomhas]

It is just an identifier. In many languages they use the word "import".

[savavampir]

Sorry for intrusion.

with a similar meaning: using std::cout;
Or when you specify in that you want to use a base function in a derived class: using Base::function;

I know for this one:

#inlcude <iostream>
int main()
{

    {
        using std::cout;//in this braces scope
        cout << "test";//don't have to write std::
    }
    cout << "test";//ERROR

}

but i don't know how it works with class methods, please share an example.

[Athar]

See http://publib.boulder.ibm.com/infocenter/comphelp/v8v101/index.jsp?topic=%2Fcom.ibm.xlcpp8a.doc%2Flanguage%2Fref%2Fusing_declaration_class_members.htm for an example.

[savavampir]

Thanks greatly. Never seen that site before.

[HenriK]

OK, so you can use using -keyword with
- classes
- namespaces
- structures
- unions(?)

The site you suggested Athar is very interesting. Thanks for your comments!