[libcxx] [flang] [libunwind] [libc] [llvm] [lldb] [clang-tools-extra] [compiler-rt] [clang] [libc++] Implement ranges::iota (PR #68494)

[Christopher Di Bella via cfe-commits]

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@@ -1161,9 +1185,11 @@ struct Proxy {
     return lhs.data == rhs.data;
   }
 
-  friend constexpr auto operator<=>(const Proxy&, const Proxy&)
-    requires (std::three_way_comparable<T> && !std::is_reference_v<T>)
-  = default;
+  friend constexpr auto operator<=>(const Proxy& lhs, const Proxy& rhs)
+    requires(std::three_way_comparable<T> && !std::is_reference_v<T>)
+  {
+    return lhs.data <=> rhs.data;
+  };
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cjdb wrote:

What is the intention of this change?

https://github.com/llvm/llvm-project/pull/68494