[libcxx-commits] [libcxx] [libc++][ranges] P2387R3: Pipe support for user-defined range adaptors (PR #89148)

[Louis Dionne via libcxx-commits]

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@@ -41,6 +42,7 @@ _LIBCPP_BEGIN_NAMESPACE_STD
 // - `x | f` is equivalent to `f(x)`
 // - `f1 | f2` is an adaptor closure `g` such that `g(x)` is equivalent to `f2(f1(x))`
 template <class _Tp>
+  requires is_class_v<_Tp> && same_as<_Tp, remove_cv_t<_Tp>>
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ldionne wrote:

Would it make sense to move this class to namespace `ranges::`?

https://github.com/llvm/llvm-project/pull/89148