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diff --git a/vala/valaexpressionstatement.vala b/vala/valaexpressionstatement.vala
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+/* valaexpressionstatement.vala
+ *
+ * Copyright (C) 2006  Jürg Billeter
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
+ *
+ * Author:
+ * 	Jürg Billeter <j@bitron.ch>
+ */
+
+using GLib;
+
+/**
+ * A code statement that evaluates a given expression. The value computed by the
+ * expression, if any, is discarded.
+ */
+public class Vala.ExpressionStatement : Statement {
+	/**
+	 * Specifies the expression to evaluate.
+	 */
+	public Expression! expression {
+		get {
+			return _expression;
+		}
+		set construct {
+			_expression = value;
+			_expression.parent_node = this;
+		}
+	}
+
+	private Expression! _expression;
+
+	/**
+	 * Creates a new expression statement.
+	 *
+	 * @param expr   expression to evaluate
+	 * @param source reference to source code
+	 * @return       newly created expression statement
+	 */
+	public ExpressionStatement (Expression! expr, SourceReference source = null) {
+		expression = expr;
+		source_reference = source;
+	}
+	
+	public override void accept (CodeVisitor! visitor) {
+		expression.accept (visitor);
+
+		visitor.visit_expression_statement (this);
+	}
+
+	public override void replace (CodeNode! old_node, CodeNode! new_node) {
+		if (expression == old_node) {
+			expression = (Expression) new_node;
+		}
+	}
+
+	public override int get_number_of_set_construction_parameters () {
+		if (expression is Assignment) {
+			var assign = (Assignment) expression;
+			if (assign.left is MemberAccess) {
+				var ma = (MemberAccess) assign.left;
+				if (ma.symbol_reference != null) {
+					if (ma.symbol_reference.node is Property) {
+						var prop = (Property) ma.symbol_reference.node;
+						return 1;
+					}
+				}
+			}
+		}
+
+		return -1;
+	}
+}