I’ve tried a lot of the “newer” languages and, somehow, I’m always happiest when I go back to C++ or even C. However, there is one thing that gets a little on my nerves when… ...

Statements are executable and can have breakpoints set on them. Everything else can't.* Really the non-executable stuff in a header is no different than the non-executable stuff in a source file.

{ void foo (); };</pre>If you intend to use forward declarations for a class (especially a template) in a lot of places, it might be wise to put it in a separate header file and include that.