mozilla-services/powerhose — Issue #4: Proper "using" usage
Author: indygreg
Created: 2012-03-01 22:43:31+00:00
State: open

In C++:

1) Never use "using namespace." It is evil. Instead, use "using X" for each individual symbol you wish to import.
2) Never use "using" inside a header file. The symbol import will apply to all other files that #include that file, which could cause unexpected symbol trampling.