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+// file : cli/traversal/expression.hxx
+// author : Boris Kolpackov <boris@codesynthesis.com>
+// license : MIT; see accompanying LICENSE file
+
+#ifndef CLI_TRAVERSAL_EXPRESSION_HXX
+#define CLI_TRAVERSAL_EXPRESSION_HXX
+
+#include <cli/traversal/elements.hxx>
+#include <cli/semantics/expression.hxx>
+
+namespace traversal
+{
+ struct expression: node<semantics::expression> {};
+}
+
+#endif // CLI_TRAVERSAL_EXPRESSION_HXX