From 7cfc4e5146be5666419451bdd516f1f3f264d24a Mon Sep 17 00:00:00 2001 From: Enrico Tassi Date: Sun, 25 Jan 2015 14:42:51 +0100 Subject: Imported Upstream version 8.5~beta1+dfsg --- test-suite/bugs/closed/HoTT_coq_063.v | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 test-suite/bugs/closed/HoTT_coq_063.v (limited to 'test-suite/bugs/closed/HoTT_coq_063.v') diff --git a/test-suite/bugs/closed/HoTT_coq_063.v b/test-suite/bugs/closed/HoTT_coq_063.v new file mode 100644 index 00000000..777f6483 --- /dev/null +++ b/test-suite/bugs/closed/HoTT_coq_063.v @@ -0,0 +1,34 @@ +Set Universe Polymorphism. +Module A. + Inductive paths A (x : A) : A -> Type := idpath : paths A x x. + + Notation "x = y" := (paths _ x y). + + Inductive IsTrunc : nat -> Type -> Type := + | BuildContr : forall A (center : A) (contr : forall y, center = y), IsTrunc 0 A + | trunc_S : forall A n, (forall x y : A, IsTrunc n (x = y)) -> IsTrunc (S n) A. + + Existing Class IsTrunc. + + + Instance is_trunc_unit : IsTrunc 0 unit. + Proof. apply BuildContr with (center:=tt). now intros []. Defined. + + Check (_ : IsTrunc 0 unit). +End A. + +Module B. + Fixpoint IsTrunc (n : nat) (A : Type) : Type := + match n with + | O => True + | S _ => False + end. + + Existing Class IsTrunc. + + Instance is_trunc_unit : IsTrunc 0 unit. + Proof. exact I. Defined. + + Check (_ : IsTrunc 0 unit). + Fail Definition foo := (_ : IsTrunc 1 unit). +End B. -- cgit v1.2.3