Good point. Opening a file has non-trivial cost, so perhaps the added cost of burdening the compiler with avoiding needless includes is worth it. As a long ti

Good point. Opening a file has non-trivial cost, so perhaps the added cost of burdening the compiler with avoiding needless includes is worth it. As a long time C hacker I hate to say this, but I guess the whole include mechanism is a bad design or, perhaps, a design that didn't scale well.