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diff --git a/deps/tao_tuple/28626e99/include/tao/seq/concatenate.hpp b/deps/tao_tuple/28626e99/include/tao/seq/concatenate.hpp
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+++ b/deps/tao_tuple/28626e99/include/tao/seq/concatenate.hpp
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+// The Art of C++ / Sequences
+// Copyright (c) 2015 Daniel Frey
+
+#ifndef TAOCPP_SEQUENCES_INCLUDE_CONCATENATE_HPP
+#define TAOCPP_SEQUENCES_INCLUDE_CONCATENATE_HPP
+
+#include <type_traits>
+
+#include "integer_sequence.hpp"
+
+namespace tao
+{
+  namespace seq
+  {
+    template< typename, typename >
+    struct concatenate;
+
+    template< typename TA, TA... As, typename TB, TB... Bs >
+    struct concatenate< integer_sequence< TA, As... >, integer_sequence< TB, Bs... > >
+    {
+      using type = integer_sequence< typename std::common_type< TA, TB >::type, As..., Bs... >;
+    };
+
+    template< typename A, typename B >
+    using concatenate_t = typename concatenate< A, B >::type;
+  }
+}
+
+#endif // TAOCPP_SEQUENCES_INCLUDE_CONCATENATE_HPP