From d070b5be9ede2e5926248e509abbd9014d76fdc0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Patrick=20L=C3=BChne?= <patrick-github@luehne.de>
Date: Thu, 2 Jun 2016 16:29:17 +0200
Subject: [PATCH] Added expression visitor base class.

---
 include/plasp/pddl/ExpressionVisitor.h | 35 ++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 include/plasp/pddl/ExpressionVisitor.h

diff --git a/include/plasp/pddl/ExpressionVisitor.h b/include/plasp/pddl/ExpressionVisitor.h
new file mode 100644
index 0000000..e6063cb
--- /dev/null
+++ b/include/plasp/pddl/ExpressionVisitor.h
@@ -0,0 +1,35 @@
+#ifndef __PLASP__PDDL__EXPRESSION_VISITOR_H
+#define __PLASP__PDDL__EXPRESSION_VISITOR_H
+
+#include <plasp/pddl/Expression.h>
+
+namespace plasp
+{
+namespace pddl
+{
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+//
+// ExpressionVisitor
+//
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+class Expression;
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+class ExpressionVisitor
+{
+	public:
+		virtual void apply(const Expression &expression)
+		{
+			expression.accept(*this);
+		}
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+}
+}
+
+#endif