commit e684aa6e9a30ec5ce83385a42c96fbcacacd8fb4
author Louis Dionne <ldionne@apple.com> Mon Apr 01 16:39:34 2019 +0000
committer Louis Dionne <ldionne@apple.com> Mon Apr 01 16:39:34 2019 +0000
tree c0712d24bb52cdbfc750dc03a30d9dbd7ca768fb
parent b8f3cd01ddc1162a8783d6b0f9999bb44111aa36

[libc++] Declare std::tuple_element as struct instead of class

Similarly to https://reviews.llvm.org/rL350972, this revision changes
std::tuple_element from class to struct.

Fixes PR41331.
Thanks to Jan Wilken Dörrie for the patch.

Differential Revision: https://reviews.llvm.org/D60069

llvm-svn: 357411
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 2b0c7abba35ac2dc8e00c121b93476ff879bfd86

include/__tuple

diff --git a/include/__tuple b/include/__tuple
index 89134b5..0381031 100644
--- a/include/__tuple
+++ b/include/__tuple
@@ -53,26 +53,23 @@
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS tuple_size<const volatile _Tp> : public tuple_size<_Tp> {};
 #endif
 
-template <size_t _Ip, class _Tp> class _LIBCPP_TEMPLATE_VIS tuple_element;
+template <size_t _Ip, class _Tp> struct _LIBCPP_TEMPLATE_VIS tuple_element;
 
 template <size_t _Ip, class _Tp>
-class _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, const _Tp>
+struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, const _Tp>
 {
-public:
     typedef typename add_const<typename tuple_element<_Ip, _Tp>::type>::type type;
 };
 
 template <size_t _Ip, class _Tp>
-class _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, volatile _Tp>
+struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, volatile _Tp>
 {
-public:
     typedef typename add_volatile<typename tuple_element<_Ip, _Tp>::type>::type type;
 };
 
 template <size_t _Ip, class _Tp>
-class _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, const volatile _Tp>
+struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, const volatile _Tp>
 {
-public:
     typedef typename add_cv<typename tuple_element<_Ip, _Tp>::type>::type type;
 };
 
@@ -281,9 +278,8 @@
 #endif
 
 template <size_t _Ip, class ..._Types>
-class _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, __tuple_types<_Types...>>
+struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, __tuple_types<_Types...>>
 {
-public:
     static_assert(_Ip < sizeof...(_Types), "tuple_element index out of range");
     typedef __type_pack_element<_Ip, _Types...> type;
 };
@@ -456,9 +452,8 @@
 
 
 template <size_t _Ip, class ..._Tp>
-class _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, tuple<_Tp...> >
+struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, tuple<_Tp...> >
 {
-public:
     typedef typename tuple_element<_Ip, __tuple_types<_Tp...> >::type type;
 };