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diff --git a/deps/tao_tuple/28626e99/include/tao/seq/plus.hpp b/deps/tao_tuple/28626e99/include/tao/seq/plus.hpp
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index 0000000000..18ac4c435e
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+++ b/deps/tao_tuple/28626e99/include/tao/seq/plus.hpp
@@ -0,0 +1,29 @@
+// The Art of C++ / Sequences
+// Copyright (c) 2015 Daniel Frey
+
+#ifndef TAOCPP_SEQUENCES_INCLUDE_PLUS_HPP
+#define TAOCPP_SEQUENCES_INCLUDE_PLUS_HPP
+
+#include <type_traits>
+
+#include "zip.hpp"
+
+namespace tao
+{
+  namespace seq
+  {
+    namespace impl
+    {
+      template< typename T, T A, T B >
+      using plus = std::integral_constant< T, A + B >;
+    }
+
+    template< typename A, typename B >
+    using plus = zip< impl::plus, A, B >;
+
+    template< typename A, typename B >
+    using plus_t = typename plus< A, B >::type;
+  }
+}
+
+#endif // TAOCPP_SEQUENCES_INCLUDE_PLUS_HPP