Do you prefer explicit namespaces or 'using' in C++?
c++, namespaces, using
Solution
I always use `using namespace` for std & boost. Everything else I tend to use an explicit namespace unless it is used so much that it would clutter up the code.
In headers, I never use `using namespace` to avoid polluting the global namespace of the #including source.
Problem
When using C++ namespaces, do you prefer to explicitly name them, like this: ``` std::cout << "Hello, world!\n"; ``` Or do you prefer `using namespace`: ``` using namespace std; cout << "Hello, world!\n"; ``` And if if you prefer the latter, do you declare your usings at file or function scope? Personally I prefer to explicitly name them - it's more typing but when using a mixture of namespaces (e.g. `std` and `boost`) I find it more readable.