adding ExpressionStatement

inc/AST/ExpressionStatement.h

@@ -0,0 +1,20 @@
+#ifndef EXPRESSIONSTATEMENT_H
+#define EXPRESSIONSTATEMENT_H
+
+#include "AST/Expression.h"
+#include "AST/Statement.h"
+
+class ExpressionStatement : public Statement
+{
+public:
+	ExpressionStatement(Expression* expr);
+	virtual ~ExpressionStatement();
+
+	virtual void accept(ASTVisitor* visitor);
+
+	Expression* getExpr();
+private:
+	Expression* expr_;
+};
+
+#endif // EXPRESSIONSTATEMENT_H