lean4-htt/tests/lean/errorOnInductionForNested.lean at 0c2fb34c82c5cae7cba902b3f78113f3afb194f8 - max/lean4-htt - maxgit: wireguard access, git repository.

max/lean4-htt

Leonardo de Moura 8d42978e63 feat: generate error message when induction tactic is used on a nested inductive type without specifying an eliminator

2022-03-11 14:45:57 -08:00

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 inductive LazyList (α : Type u)
 | nil : LazyList α
 | cons (hd : α) (tl : LazyList α) : LazyList α
 | delayed (t : Thunk (LazyList α)) : LazyList α
 example (as : LazyList α) : True := by
   induction as