Mark Shannon <m...@hotpy.org> added the comment:
This change combines the explicit state in `PyFrameObject.f_excuting` and `PyGenObject.gi_running`, and the implicit state in `PyFrameObject.f_stacktop == NULL` and `PyFrameObject.f_last == -1` into a single enum field in `PyFrameObject`. Since we no longer need to test `PyFrameObject.f_stacktop == NULL` , The `f_stacktop` pointer can be replaced with a `f_stackdepth` integer, which make for simpler code when iterating over the stack and avoids the potential hazard of NULL pointers. There are three benefits to these changes: 1. The code is more robust and, IMO, easier to understand, as all state is now explicit. 2. It carries additional information about the state of the frame. Information about whether a frame exiting by `return` or by `raise` is available. 3. A modest reduction in size of frame and generator objects. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue40941> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
