Added missing array_get method for numeric_list

1 files changed, 4 insertions, 0 deletions

diff --git a/unsupported/Eigen/CXX11/src/util/CXX11Meta.h b/unsupported/Eigen/CXX11/src/util/CXX11Meta.h
index ec27eddb8..63c2a1def 100644
--- a/unsupported/Eigen/CXX11/src/util/CXX11Meta.h
+++ b/unsupported/Eigen/CXX11/src/util/CXX11Meta.h
@@ -123,6 +123,10 @@ template<typename a, typename... as>                      struct get<0, type_lis
 template<typename T, int n, T a, T... as>                        struct get<n, numeric_list<T, a, as...>>   : get<n-1, numeric_list<T, as...>> {};
 template<typename T, T a, T... as>                               struct get<0, numeric_list<T, a, as...>>   { constexpr static T value = a; };
 
+template<std::size_t n, typename T, T a, T... as> constexpr inline const T       array_get(const numeric_list<T, a, as...>& l) {
+  return get<(int)n, numeric_list<T, a, as...>>::value;
+} 
+
 /* always get type, regardless of dummy; good for parameter pack expansion */
 
 template<typename T, T dummy, typename t> struct id_numeric  { typedef t type; };