[PATCH 2/2] libstdc++: Implement LWG 3692/3702 changes to zip_/zip_transform_view

[Patrick Palka via Gcc-patches]

Tested on x86_64-pc-linux-gnu, does this look OK for trunk?

libstdc++-v3/ChangeLog:

        * include/std/ranges (zip_view::_Iterator::operator<): Remove.
        (zip_view::_Iterator::operator>): Remove.
        (zip_view::_Iterator::operator<=): Remove.
        (zip_view::_Iterator::operator>=): Remove.
        (zip_view::_Iterator::operator<=>): Remove three_way_comparable
        constraint.
        (zip_transform_view::_Iterator): Ditto.
---
 libstdc++-v3/include/std/ranges | 43 +--------------------------------
 1 file changed, 1 insertion(+), 42 deletions(-)

diff --git a/libstdc++-v3/include/std/ranges b/libstdc++-v3/include/std/ranges
index d748cb73346..bf0ff29c38c 100644
--- a/libstdc++-v3/include/std/ranges
+++ b/libstdc++-v3/include/std/ranges
@@ -4616,30 +4616,9 @@ namespace views::__adaptor
        }(make_index_sequence<sizeof...(_Vs)>{});
     }
 
-    friend constexpr bool
-    operator<(const _Iterator& __x, const _Iterator& __y)
-      requires __detail::__all_random_access<_Const, _Vs...>
-    { return __x._M_current < __y._M_current; }
-
-    friend constexpr bool
-    operator>(const _Iterator& __x, const _Iterator& __y)
-      requires __detail::__all_random_access<_Const, _Vs...>
-    { return __y < __x; }
-
-    friend constexpr bool
-    operator<=(const _Iterator& __x, const _Iterator& __y)
-      requires __detail::__all_random_access<_Const, _Vs...>
-    { return !(__y < __x); }
-
-    friend constexpr bool
-    operator>=(const _Iterator& __x, const _Iterator& __y)
-      requires __detail::__all_random_access<_Const, _Vs...>
-    { return !(__x < __y); }
-
     friend constexpr auto
     operator<=>(const _Iterator& __x, const _Iterator& __y)
       requires __detail::__all_random_access<_Const, _Vs...>
-       && (three_way_comparable<iterator_t<__detail::__maybe_const_t<_Const, 
_Vs>>> && ...)
     { return __x._M_current <=> __y._M_current; }
 
     friend constexpr _Iterator
@@ -5008,29 +4987,9 @@ namespace views::__adaptor
       requires equality_comparable<__ziperator<_Const>>
     { return __x._M_inner == __y._M_inner; }
 
-    friend constexpr bool
-    operator<(const _Iterator& __x, const _Iterator& __y)
-      requires random_access_range<_Base<_Const>>
-    { return __x._M_inner < __y._M_inner; }
-
-    friend constexpr bool
-    operator>(const _Iterator& __x, const _Iterator& __y)
-      requires random_access_range<_Base<_Const>>
-    { return __x._M_inner > __y._M_inner; }
-
-    friend constexpr bool
-    operator<=(const _Iterator& __x, const _Iterator& __y)
-      requires random_access_range<_Base<_Const>>
-    { return __x._M_inner <= __y._M_inner; }
-
-    friend constexpr bool
-    operator>=(const _Iterator& __x, const _Iterator& __y)
-      requires random_access_range<_Base<_Const>>
-    { return __x._M_inner >= __y._M_inner; }
-
     friend constexpr auto
     operator<=>(const _Iterator& __x, const _Iterator& __y)
-      requires random_access_range<_Base<_Const>> && 
three_way_comparable<__ziperator<_Const>>
+      requires random_access_range<_Base<_Const>>
     { return __x._M_inner <=> __y._M_inner; }
 
     friend constexpr _Iterator
-- 
2.37.2.382.g795ea8776b