Commit 2022-04-08 13:45 f5d4fa19
View on Github →feat(data/fintype/basic): add fintype_of_{equiv,option} (#13086)
fintype_of_option_equiv was extracted from @huynhtrankhanh's https://github.com/leanprover-community/mathlib/pull/11162, moved here to a separate PR. The split into fintype_of_option and fintype_of_equiv is based on a comment on that PR by @jcommelin.