1 files changed, 31 insertions, 0 deletions
diff --git a/src/third_party/boost-1.69.0/boost/type_traits/type_identity.hpp b/src/third_party/boost-1.69.0/boost/type_traits/type_identity.hpp
new file mode 100644
index 00000000000..4a03a13a391
--- /dev/null
+++ b/src/third_party/boost-1.69.0/boost/type_traits/type_identity.hpp
@@ -0,0 +1,31 @@
+#ifndef BOOST_TYPE_TRAITS_TYPE_IDENTITY_HPP_INCLUDED
+#define BOOST_TYPE_TRAITS_TYPE_IDENTITY_HPP_INCLUDED
+
+//
+//  Copyright 2015 Peter Dimov
+//
+//  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/config.hpp>
+
+namespace boost
+{
+
+template<class T> struct type_identity
+{
+    typedef T type;
+};
+
+#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
+
+template <class T> using type_identity_t = typename type_identity<T>::type;
+
+#endif
+
+
+} // namespace boost
+
+#endif // #ifndef BOOST_TYPE_TRAITS_TYPE_IDENTITY_HPP_INCLUDED