[libcxx-commits] [PATCH] D151629: [libc++][ranges] Implement P2494R2 (Relaxing range adaptors to allow for move only types)

[Louis Dionne via Phabricator via libcxx-commits]

ldionne added subscribers: jwakely, CaseyCarter.
ldionne added inline comments.


================
Comment at: libcxx/include/__ranges/movable_box.h:44
+concept __movable_box_object =
+#if _LIBCPP_STD_VER >= 23
+  move_constructible<_Tp>
----------------
var-const wrote:
> Is there a reason not to apply the new behavior to old language versions retroactively? Would this change break any existing code?
> 
> (Also tagging @ldionne )
https://github.com/cplusplus/papers/issues/1156 is not super clear as to whether this should be treated as a DR.

@jwakely @CaseyCarter what did you folks do here? Did you apply P2494R2 (`copyable-box` => `movable-box`) as a DR to C++20, or do you consider it as a C++23 feature?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D151629/new/

https://reviews.llvm.org/D151629