[libcxx-commits] [libcxx] [libc++][ranges] implement `ranges::shift_left` (PR #83231)

[Nikolas Klauser via libcxx-commits]

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@@ -24,30 +26,40 @@ _LIBCPP_BEGIN_NAMESPACE_STD
 
 #if _LIBCPP_STD_VER >= 20
 
-template <class _ForwardIterator>
-inline _LIBCPP_HIDE_FROM_ABI constexpr _ForwardIterator
-shift_left(_ForwardIterator __first,
-           _ForwardIterator __last,
-           typename iterator_traits<_ForwardIterator>::difference_type __n) {
+template <class _AlgPolicy, class _Iter, class _Sent>
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philnik777 wrote:

Please add a `_LIBCPP_ASSERT_UNCATEGORIZED` to check the precondition (CC @var-const).

https://github.com/llvm/llvm-project/pull/83231