On Tue, Dec 12, 2000 at 05:02:49PM -0800, Tim Peters wrote:

Update of /cvsroot/python/python/dist/src/Objects In directory slayer.i.sourceforge.net:/tmp/cvs-serv31776/python/dist/src/objects

Modified Files: dictobject.c Log Message: Bring comments up to date (e.g., they still said the table had to be a prime size, which is in fact never true anymore ...). ... --- 55,78 ----

/* ! There are three kinds of slots in the table: ! ! 1. Unused. me_key == me_value == NULL ! Does not hold an active (key, value) pair now and never did. Unused can ! transition to Active upon key insertion. This is the only case in which ! me_key is NULL, and is each slot's initial state. ! ! 2. Active. me_key != NULL and me_key != dummy and me_value != NULL ! Holds an active (key, value) pair. Active can transition to Dummy upon ! key deletion. This is the only case in which me_value != NULL. ! ! 3. Dummy. me_key == dummy && me_value == NULL ! Previously held an active (key, value) pair, but that was deleted and an ! active pair has not yet overwritten the slot. Dummy can transition to ! Active upon key insertion. Dummy slots cannot be made Unused again ! (cannot have me_key set to NULL), else the probe sequence in case of ! collision would have no way to know they were once active.

4. The popitem finger. :-) Cheers, -g -- Greg Stein, http://www.lyra.org/