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[std-proposals] Support std::numeric_limits for enums

From: Gergely Nagy <gergely.nagy.alt_at_[hidden]>
Date: Sun, 25 Sep 2022 15:15:33 +0200

This would be a really basic and quite useful feature. min() and max() for
enums would make it possible to create generic enum sets using std::bitset,
and this can be a great optimization. A lot of people use
std::unordered_set for enums, which is a waste.

Additionally there could be an is_sparse() member that would tell if there
is any gap, or even some gap statistics, so one could statically use
std::unordered_set for very sparse enums and something more lightweight
(like bitset) for dense ones.

What do you think?

   Gergely Nagy

Received on 2022-09-25 13:15:45