libcxx: update to LLVM 17

release/17.x branch, commit 8f4dd44097c9ae25dd203d5ac87f3b48f854bba8

This adds the flag `-D_LIBCPP_PSTL_CPU_BACKEND_SERIAL`. A future
enhancement could possibly pass something different if there is a
compelling parallel implementation. That libdispatch one might be worth
looking into.

1 files changed, 23 insertions, 26 deletions

diff --git a/lib/libcxx/include/__algorithm/ranges_set_difference.h b/lib/libcxx/include/__algorithm/ranges_set_difference.h
index 607dd687a5..a9453ed336 100644
--- a/lib/libcxx/include/__algorithm/ranges_set_difference.h
+++ b/lib/libcxx/include/__algorithm/ranges_set_difference.h
@@ -30,7 +30,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17
+#if _LIBCPP_STD_VER >= 20
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -42,15 +42,14 @@ using set_difference_result = in_out_result<_InIter, _OutIter>;
 namespace __set_difference {
 
 struct __fn {
-  template <
-      input_iterator _InIter1,
-      sentinel_for<_InIter1> _Sent1,
-      input_iterator _InIter2,
-      sentinel_for<_InIter2> _Sent2,
-      weakly_incrementable _OutIter,
-      class _Comp  = less,
-      class _Proj1 = identity,
-      class _Proj2 = identity>
+  template <input_iterator _InIter1,
+            sentinel_for<_InIter1> _Sent1,
+            input_iterator _InIter2,
+            sentinel_for<_InIter2> _Sent2,
+            weakly_incrementable _OutIter,
+            class _Comp  = less,
+            class _Proj1 = identity,
+            class _Proj2 = identity>
     requires mergeable<_InIter1, _InIter2, _OutIter, _Comp, _Proj1, _Proj2>
   _LIBCPP_HIDE_FROM_ABI constexpr set_difference_result<_InIter1, _OutIter> operator()(
       _InIter1 __first1,
@@ -66,22 +65,20 @@ struct __fn {
     return {std::move(__ret.first), std::move(__ret.second)};
   }
 
-  template <
-      input_range _Range1,
-      input_range _Range2,
-      weakly_incrementable _OutIter,
-      class _Comp  = less,
-      class _Proj1 = identity,
-      class _Proj2 = identity>
+  template <input_range _Range1,
+            input_range _Range2,
+            weakly_incrementable _OutIter,
+            class _Comp  = less,
+            class _Proj1 = identity,
+            class _Proj2 = identity>
     requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _OutIter, _Comp, _Proj1, _Proj2>
   _LIBCPP_HIDE_FROM_ABI constexpr set_difference_result<borrowed_iterator_t<_Range1>, _OutIter>
-    operator()(
-        _Range1&& __range1,
-        _Range2&& __range2,
-        _OutIter __result,
-        _Comp __comp   = {},
-        _Proj1 __proj1 = {},
-        _Proj2 __proj2 = {}) const {
+  operator()(_Range1&& __range1,
+             _Range2&& __range2,
+             _OutIter __result,
+             _Comp __comp   = {},
+             _Proj1 __proj1 = {},
+             _Proj2 __proj2 = {}) const {
     auto __ret = std::__set_difference<_RangeAlgPolicy>(
         ranges::begin(__range1),
         ranges::end(__range1),
@@ -96,11 +93,11 @@ struct __fn {
 } // namespace __set_difference
 
 inline namespace __cpo {
-  inline constexpr auto set_difference = __set_difference::__fn{};
+inline constexpr auto set_difference = __set_difference::__fn{};
 } // namespace __cpo
 } // namespace ranges
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17
+#endif // _LIBCPP_STD_VER >= 20
 #endif // _LIBCPP___ALGORITHM_RANGES_SET_DIFFERENCE_H