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476 B · 33 lines
at master
12345678910111213141516171819202122232425262728293031323334(* coq-prog-args: ("-impredicative-set") *)Set Implicit Arguments.Unset Strict Implicit.
Module Type SIG. Parameter id : forall A : Set, A -> A.End SIG.
Module M (X: SIG). Definition idid := X.id X.id. Definition id := idid X.id.End M.
Module N := M.
Module Nat. Definition T := nat. Definition x := 0. Definition id (A : Set) (x : A) := x.End Nat.
Module Z := N Nat.
Check (Z.idid 0).
Module P (Y: SIG) := N.
Module Y := P Nat Z.
Check (Y.id 0).