fixup! WIP: [libc++][ranges] Implement ranges::stride_view.

Rebase to main.

Author: hawkinsw

libcxx/include/__ranges/stride_view.h

@@ -12,6 +12,7 @@
 
 #include <__assert>
 #include <__compare/three_way_comparable.h>
+#include <__concepts/constructible.h>
 #include <__concepts/convertible_to.h>
 #include <__concepts/derived_from.h>
 #include <__concepts/equality_comparable.h>
@@ -35,6 +36,8 @@
 #include <__ranges/range_adaptor.h>
 #include <__ranges/view_interface.h>
 
+#include <__type_traits/make_unsigned.h>
+
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
 #endif
@@ -395,7 +398,7 @@ struct __fn {
 
   template <class _Np>
   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Np&& __n) const {
-    return __range_adaptor_closure_t(std::__bind_back(*this, std::forward<_Np>(__n)));
+    return __pipeable(std::__bind_back(*this, std::forward<_Np>(__n)));
   }
 };
 } // namespace __stride_view

libcxx/test/std/ranges/range.adaptors/range.stride.view/concept.verify.cpp

@@ -18,7 +18,9 @@
 #include "types.h"
 
 template <typename I, std::ranges::range_difference_t<I> D>
-concept CanStrideView = requires { std::ranges::stride_view<I>{I{}, D}; };
+concept CanStrideView = requires {
+  std::ranges::stride_view<I>{I{}, D};
+};
 
 // Ensure that the InputRangeNotIndirectlyReadable is a valid range.
 static_assert(std::ranges::range<InputRangeNotIndirectlyReadable>);