1 files changed, 18 insertions, 0 deletions
diff --git a/src/boost/libs/mpl/book/chapter1/binary.hpp b/src/boost/libs/mpl/book/chapter1/binary.hpp
new file mode 100644
index 000000000..39213863e
--- /dev/null
+++ b/src/boost/libs/mpl/book/chapter1/binary.hpp
@@ -0,0 +1,18 @@
+//
+// Copyright 2005 David Abrahams and Aleksey Gurtovoy. Distributed
+// under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+#include "boost/mpl/long.hpp"
+#include "boost/mpl/alias.hpp"
+
+template< long n > struct binary
+    : mpl::long_< ( binary< n / 10 >::value << 1 ) + n % 10 >
+{
+};
+
+template<> struct binary<0>
+    : mpl::long_<0>
+{
+};