is using namespace foo inside a class acceptable?

Asked Feb 10 '17 at 11:39

Active Feb 10 '17 at 12:10

Viewed 65 times

I know that we should not add a code like this in a header file:

using namespace std;

but what about this:

namespace foo
{
    class A
    {
     public:
        void add()
        {
             using namespace std;
             // do some work here 
         }
    }
}

As far as I know then std is only brought out into function add and no to any other classes in the name space.

Is it still not acceptable? Why?

edited Feb 10 '17 at 12:10

asked Feb 10 '17 at 11:39

mans

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No, and the compiler would tell you so. In any case, if `class A` is in namespace `foo`, it automatically looks up names in `foo`. – juanchopanza Feb 10 '17 at 11:42
You can add it to an individual member function, but not to the entire class. – Bo Persson Feb 10 '17 at 11:52
@BoPersson : is it acceptable to do so? adding to individual member functions? – mans Feb 10 '17 at 12:05
Why don't you ask that question, instead of asking whether code that doesn't compile is acceptable? – juanchopanza Feb 10 '17 at 12:07
@mans - I rarely do it, but it is allowed. You should also consider if typing 20 characters in the directive actually saves you anything. `std::` is just 5 characters. – Bo Persson Feb 10 '17 at 12:08
@juanchopanza I changed my question in this effect! – mans Feb 10 '17 at 12:09
And you didn't even try to compile it. – juanchopanza Feb 10 '17 at 12:11
@juanchopanza You are right and it is my bad, sorry for it. – mans Feb 10 '17 at 12:13

is using namespace foo inside a class acceptable?

0 Answers0