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

libstdc++-v3/ChangeLog:

        * include/bits/ranges_base.h (__advance_fn::operator()): Add
        parentheses in assert condition to avoid -Wparentheses warning.
        * include/std/ranges: (take_view::take_view): Uglify 'base'.
        (take_while_view::take_while_view): Likewise.
        (elements_view::elements_view): Likewise.
        (views::_Zip::operator()): Adjust position of [[nodiscard]] for
        compatibility with -fconcepts-ts.
        (zip_transform_view::_Sentinel): Uglify 'OtherConst'.
        (views::_ZipTransform::operator()): Adjust position of
        [[nodiscard]] for compatibilty with -fconcepts-ts.
---
 libstdc++-v3/include/bits/ranges_base.h |  2 +-
 libstdc++-v3/include/std/ranges         | 40 ++++++++++++-------------
 2 files changed, 20 insertions(+), 22 deletions(-)

diff --git a/libstdc++-v3/include/bits/ranges_base.h 
b/libstdc++-v3/include/bits/ranges_base.h
index 38db33fd2ce..866d7c56cbc 100644
--- a/libstdc++-v3/include/bits/ranges_base.h
+++ b/libstdc++-v3/include/bits/ranges_base.h
@@ -778,7 +778,7 @@ namespace ranges
            else if (__n != 0) [[likely]]
              {
                // n and bound must not lead in opposite directions:
-               __glibcxx_assert(__n < 0 == __diff < 0);
+               __glibcxx_assert((__n < 0) == (__diff < 0));
 
                (*this)(__it, __n);
                return 0;
diff --git a/libstdc++-v3/include/std/ranges b/libstdc++-v3/include/std/ranges
index 2352aad76fc..39822b71b94 100644
--- a/libstdc++-v3/include/std/ranges
+++ b/libstdc++-v3/include/std/ranges
@@ -2121,8 +2121,8 @@ namespace views::__adaptor
       take_view() requires default_initializable<_Vp> = default;
 
       constexpr
-      take_view(_Vp base, range_difference_t<_Vp> __count)
-       : _M_base(std::move(base)), _M_count(std::move(__count))
+      take_view(_Vp __base, range_difference_t<_Vp> __count)
+       : _M_base(std::move(__base)), _M_count(std::move(__count))
       { }
 
       constexpr _Vp
@@ -2355,8 +2355,8 @@ namespace views::__adaptor
        = default;
 
       constexpr
-      take_while_view(_Vp base, _Pred __pred)
-       : _M_base(std::move(base)), _M_pred(std::move(__pred))
+      take_while_view(_Vp __base, _Pred __pred)
+       : _M_base(std::move(__base)), _M_pred(std::move(__pred))
       { }
 
       constexpr _Vp
@@ -3982,8 +3982,8 @@ namespace views::__adaptor
       elements_view() requires default_initializable<_Vp> = default;
 
       constexpr explicit
-      elements_view(_Vp base)
-       : _M_base(std::move(base))
+      elements_view(_Vp __base)
+       : _M_base(std::move(__base))
       { }
 
       constexpr _Vp
@@ -4753,9 +4753,8 @@ namespace views::__adaptor
     {
       template<typename... _Ts>
        requires (sizeof...(_Ts) == 0 || __detail::__can_zip_view<_Ts...>)
-       [[nodiscard]]
        constexpr auto
-       operator()(_Ts&&... __ts) const
+       operator() [[nodiscard]] (_Ts&&... __ts) const
        {
          if constexpr (sizeof...(_Ts) == 0)
            return views::empty<tuple<>>;
@@ -5036,22 +5035,22 @@ namespace views::__adaptor
       : _M_inner(std::move(__i._M_inner))
     { }
 
-    template<bool OtherConst>
-      requires sentinel_for<__zentinel<_Const>, __ziperator<OtherConst>>
+    template<bool _OtherConst>
+      requires sentinel_for<__zentinel<_Const>, __ziperator<_OtherConst>>
     friend constexpr bool
-    operator==(const _Iterator<OtherConst>& __x, const _Sentinel& __y)
+    operator==(const _Iterator<_OtherConst>& __x, const _Sentinel& __y)
     { return __x._M_inner == __y._M_inner; }
 
-    template<bool OtherConst>
-      requires sized_sentinel_for<__zentinel<_Const>, __ziperator<OtherConst>>
-    friend constexpr range_difference_t<__detail::__maybe_const_t<OtherConst, 
_InnerView>>
-    operator-(const _Iterator<OtherConst>& __x, const _Sentinel& __y)
+    template<bool _OtherConst>
+      requires sized_sentinel_for<__zentinel<_Const>, __ziperator<_OtherConst>>
+    friend constexpr range_difference_t<__detail::__maybe_const_t<_OtherConst, 
_InnerView>>
+    operator-(const _Iterator<_OtherConst>& __x, const _Sentinel& __y)
     { return __x._M_inner - __y._M_inner; }
 
-    template<bool OtherConst>
-      requires sized_sentinel_for<__zentinel<_Const>, __ziperator<OtherConst>>
-    friend constexpr range_difference_t<__detail::__maybe_const_t<OtherConst, 
_InnerView>>
-    operator-(const _Sentinel& __x, const _Iterator<OtherConst>& __y)
+    template<bool _OtherConst>
+      requires sized_sentinel_for<__zentinel<_Const>, __ziperator<_OtherConst>>
+    friend constexpr range_difference_t<__detail::__maybe_const_t<_OtherConst, 
_InnerView>>
+    operator-(const _Sentinel& __x, const _Iterator<_OtherConst>& __y)
     { return __x._M_inner - __y._M_inner; }
   };
 
@@ -5068,9 +5067,8 @@ namespace views::__adaptor
     {
       template<typename _Fp, typename... _Ts>
        requires (sizeof...(_Ts) == 0) || 
__detail::__can_zip_transform_view<_Fp, _Ts...>
-       [[nodiscard]]
        constexpr auto
-       operator()(_Fp&& __f, _Ts&&... __ts) const
+       operator() [[nodiscard]] (_Fp&& __f, _Ts&&... __ts) const
        {
          if constexpr (sizeof...(_Ts) == 0)
            return views::empty<decay_t<invoke_result_t<_Fp>>>;
-- 
2.37.2.490.g6c8e4ee870

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