From 8a0619680e19c935fe6a0ce67ecf89332059771a Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Tue, 29 Mar 2022 21:00:55 +0200
Subject: [PATCH] Vendor import of llvm-project branch release/14.x
 llvmorg-14.0.0-2-g3f43d803382d.

---
 libcxx/include/span | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/libcxx/include/span b/libcxx/include/span
index b8dbc7e01fd..f3356903173 100644
--- a/libcxx/include/span
+++ b/libcxx/include/span
@@ -622,7 +622,13 @@ template<class _Tp, size_t _Sz>
 template<class _Tp, size_t _Sz>
     span(const array<_Tp, _Sz>&) -> span<const _Tp, _Sz>;
 
-#if !defined(_LIBCPP_HAS_NO_CONCEPTS) && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
+#if defined(_LIBCPP_HAS_NO_CONCEPTS) || defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
+template<class _Container>
+    span(_Container&) -> span<typename _Container::value_type>;
+
+template<class _Container>
+    span(const _Container&) -> span<const typename _Container::value_type>;
+#else
 template<ranges::contiguous_range _Range>
     span(_Range&&) -> span<remove_reference_t<ranges::range_reference_t<_Range>>>;
 #endif