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(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *)
(* <O___,, * (see CREDITS file for the list of authors) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
(* (c) Copyright 2006-2016 Microsoft Corporation and Inria. *)
Require ssreflect.
Require Import Arith.
Goal (forall a b, a + b = b + a).
intros.
rewrite plus_comm, plus_comm.
split.
Abort.
Module Foo.
Import ssreflect.
Goal (forall a b, a + b = b + a).
intros.
rewrite 2![_ + _]plus_comm.
split.
Abort.
End Foo.
Goal (forall a b, a + b = b + a).
intros.
rewrite plus_comm, plus_comm.
split.
Abort.
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