[autoreleasepool]

IIRC, importing an entire namespace into scope is a feature that was added exclusively for backwards compatibility and is not idiomatic modern C++.

What is idiomatic is explicitly importing individual symbols into a name peace.

    #include <iostream>
    #include <vector>
    #include <string>
    
    using std::cout;
    using std::vector;
    using std::string;

    int main() { 
    
      vector<string> v {"explicit ", "is better ", "than implicit\n" };

      for (auto p: v) cout << p;
      
      return 0;
      
    }

I'm on mobile so please forgive errors.

[2bitencryption]

Wow, I never knew about that. I always hated having std:: everywhere, just so I could have "correct" C++. But I also hated referencing to std implicitly. This is the perfect tradeoff: explicitly state intentions in the beginning, then implicitly reference them as you go. (works until you use eighty five billion lines just to import your symbols)