Index: src/Tuples/Tuples.h
===================================================================
--- src/Tuples/Tuples.h	(revision 6b0b624129f6017f7706b516a24a52e382e3a334)
+++ src/Tuples/Tuples.h	(revision 193bba077f4381123065e2bdccce296fdf5153e9)
@@ -46,4 +46,7 @@
 	/// returns true if the expression may contain side-effects.
 	bool maybeImpure( Expression * expr );
+
+	/// returns true if the expression may contain side-effect, ignoring the presence of unique expressions.
+	bool maybeImpureIgnoreUnique( Expression * expr );
 } // namespace Tuples