#ifndef TREE_H
#define TREE_H
+#include <boost/coroutine/all.hpp>
+
#include <cstddef>
#include <string>
#include <boost/assert.hpp>
#include <boost/config.hpp>
-#include <boost/coroutine/all.hpp>
#include <boost/intrusive_ptr.hpp>
#if defined(_MSC_VER)