From 98728312c846613729158c0d8d00eb65b264573e Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Thu, 12 Jul 2018 17:00:37 +0200
Subject: Fix compilation regarding std::array

---
 Eigen/src/Core/util/Meta.h | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'Eigen/src/Core/util/Meta.h')

diff --git a/Eigen/src/Core/util/Meta.h b/Eigen/src/Core/util/Meta.h
index 748f24b1e..33dc0034c 100755
--- a/Eigen/src/Core/util/Meta.h
+++ b/Eigen/src/Core/util/Meta.h
@@ -360,6 +360,13 @@ template<typename T, int N> struct array_size<T (&)[N]> {
 };
 
 #if EIGEN_HAS_CXX11
+}}
+namespace std {
+  template<class T, std::size_t N> struct array;
+}
+namespace Eigen {
+namespace internal {
+
 template<typename T, std::size_t N> struct array_size<const std::array<T,N> > {
   enum { value = N };
 };
-- 
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