ext-boost: Add safe-numerics.

boost/safe_numerics/safe_integer.hpp

@@ -0,0 +1,42 @@
+#ifndef BOOST_NUMERIC_SAFE_INTEGER_HPP
+#define BOOST_NUMERIC_SAFE_INTEGER_HPP
+
+//  Copyright (c) 2012 Robert Ramey
+//
+// 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)
+
+// not actually used here - but needed for integer arithmetic
+// so this is a good place to include it
+#include "checked_integer.hpp"
+#include "checked_result_operations.hpp"
+
+#include "safe_base.hpp"
+#include "safe_base_operations.hpp"
+
+#include "native.hpp"
+#include "exception_policies.hpp"
+
+// specialization for meta functions with safe<T> argument
+namespace boost {
+namespace safe_numerics {
+
+template <
+    class T,
+    class P = native,
+    class E = default_exception_policy
+>
+using safe = safe_base<
+    T,
+    ::std::numeric_limits<T>::min(),
+    ::std::numeric_limits<T>::max(),
+    P,
+    E
+>;
+
+} // safe_numerics
+} // boost
+
+
+#endif // BOOST_NUMERIC_SAFE_INTEGER_HPP