Index: src/libcfa/iterator
===================================================================
--- src/libcfa/iterator	(revision d41280e1c786301d271ddcab3018dd33565e37b5)
+++ src/libcfa/iterator	(revision d41280e1c786301d271ddcab3018dd33565e37b5)
@@ -0,0 +1,51 @@
+//
+// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
+//
+// The contents of this file are covered under the licence agreement in the
+// file "LICENCE" distributed with Cforall.
+//
+// iterator -- 
+//
+// Author           : Richard C. Bilson
+// Created On       : Wed May 27 17:56:53 2015
+// Last Modified By : Peter A. Buhr
+// Last Modified On : Wed Jan 27 23:49:13 2016
+// Update Count     : 7
+//
+
+#ifndef ITERATOR_H
+#define ITERATOR_H
+
+// An iterator can be used to traverse a data structure.
+context iterator( type iterator_type, type elt_type ) {
+	// point to the next element
+//	iterator_type ?++( iterator_type * );
+	iterator_type ++?( iterator_type * );
+	iterator_type --?( iterator_type * );
+
+	// can be tested for equality with other iterators
+	int ?==?( iterator_type, iterator_type );
+	int ?!=?( iterator_type, iterator_type );
+
+	// dereference to get the pointed-at element
+	lvalue elt_type *?( iterator_type );
+};
+
+context iterator_for( type iterator_type, type collection_type, type elt_type | iterator( iterator_type, elt_type ) ) {
+//	[ iterator_type begin, iterator_type end ] get_iterators( collection_type );
+	iterator_type begin( collection_type );
+	iterator_type end( collection_type );
+};
+
+forall( type iterator_type, type elt_type | iterator( iterator_type, elt_type ) )
+void for_each( iterator_type begin, iterator_type end, void (*func)( elt_type ) );
+
+forall( type iterator_type, type elt_type | iterator( iterator_type, elt_type ) )
+void for_each_reverse( iterator_type begin, iterator_type end, void (*func)( elt_type ) );
+
+#endif // ITERATOR_H
+
+// Local Variables: //
+// mode: c //
+// tab-width: 4 //
+// End: //