From 6c10495a78ec400d258e2c7e6b534973468a64c7 Mon Sep 17 00:00:00 2001
From: Antonio Sanchez <cantonios@google.com>
Date: Wed, 8 Sep 2021 11:31:56 -0700
Subject: [PATCH] Remove unnecessary std::tuple reference.

---
 unsupported/Eigen/CXX11/src/Tensor/TensorIndexList.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorIndexList.h b/unsupported/Eigen/CXX11/src/Tensor/TensorIndexList.h
index 2d8c7b903..3c555244a 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorIndexList.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorIndexList.h
@@ -379,10 +379,10 @@ template<typename FirstType, typename... OtherTypes> struct array_size<const Ind
 };
 
 template<typename FirstType, typename... OtherTypes> struct array_size<IndexPairList<FirstType, OtherTypes...> > {
-  static const size_t value = std::tuple_size<std::tuple<FirstType, OtherTypes...> >::value;
+  static const size_t value = 1 + sizeof...(OtherTypes);
 };
 template<typename FirstType, typename... OtherTypes> struct array_size<const IndexPairList<FirstType, OtherTypes...> > {
-  static const size_t value = std::tuple_size<std::tuple<FirstType, OtherTypes...> >::value;
+  static const size_t value = 1 + sizeof...(OtherTypes);
 };
 
 template<Index N, typename FirstType, typename... OtherTypes> EIGEN_DEVICE_FUNC constexpr Index array_get(IndexList<FirstType, OtherTypes...>& a) {