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Francois-Rene Rideau authored
Do not perform an action twice in a session. Introduce three status bits that every action has in a given session, in addition to the stamp: KEEP-P (from previous session), DONE-P (and up-to-date, in this image), NEED-P (needed in this image as part of this session). BACKWARD INCOMPATIBILITY: Invert the meaning of NIL and T for STAMP, so that NIL means out-of-date. This makes our code conceptually nicer, and no one in Quicklisp uses our stamps, anyway. Still, beware.
Francois-Rene Rideau authoredDo not perform an action twice in a session. Introduce three status bits that every action has in a given session, in addition to the stamp: KEEP-P (from previous session), DONE-P (and up-to-date, in this image), NEED-P (needed in this image as part of this session). BACKWARD INCOMPATIBILITY: Invert the meaning of NIL and T for STAMP, so that NIL means out-of-date. This makes our code conceptually nicer, and no one in Quicklisp uses our stamps, anyway. Still, beware.