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+(* (c) Copyright Microsoft Corporation and Inria. All rights reserved. *)
+Declare ML Module "ssreflect".
+
+Set Implicit Arguments.
+Unset Strict Implicit.
+Unset Printing Implicit Defensive.
+
+Module SsrMatchingSyntax.
+
+(* Reserve the notation for rewrite patterns so that the user is not allowed  *)
+(* to declare it at a different level.                                        *)
+Reserved Notation "( a 'in' b )"        (at level 0).
+Reserved Notation "( a 'as' b )"        (at level 0).
+Reserved Notation "( a 'in' b 'in' c )" (at level 0).
+Reserved Notation "( a 'as' b 'in' c )" (at level 0).
+
+(* Notation to define shortcuts for the "X in t" part of a pattern.           *)
+Notation "( X 'in' t )" := (_ : fun X => t) : ssrpatternscope.
+Delimit Scope ssrpatternscope with pattern.
+
+(* Some shortcuts for recurrent "X in t" parts.                               *)
+Notation RHS := (X in _ = X)%pattern.
+Notation LHS := (X in X = _)%pattern.
+
+End SsrMatchingSyntax.
+
+Export SsrMatchingSyntax.