That's all well and good for Linux-style C programming maybe, but it would be painful in languages like C#.

EG the simplest function in a Unity game, that prints "hello world" for the player only would be something like:

  namespace Something 
  {
          class SomeClass 
          {
                  void Awake()
                  {
                          if (CompareTag("Player"))
                          {
                                  print("Hello, world")
                                  print("This line's closing bracket is at # 80")
                          }
                  }
          }
  }