From b14e7cedb0ba49af8475e78e7b375cdfffc72b4a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ion=20Gazta=C3=B1aga?= <igaztanaga@gmail.com>
Date: Tue, 16 May 2023 12:13:15 +0200
Subject: [PATCH] libc++ up to version 14 does not support span deduction
 guides

---
 test/vector_test.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/test/vector_test.cpp b/test/vector_test.cpp
index 5dc3631..3a98596 100644
--- a/test/vector_test.cpp
+++ b/test/vector_test.cpp
@@ -200,7 +200,8 @@ bool test_merge_empty_free()
    return !empty.get_stored_allocator().deallocate_called_without_allocate_;
 }
 
-#if defined(__cpp_lib_span)
+#if defined(__cpp_lib_span) && (!defined(_LIBCPP_VERSION) || (_LIBCPP_VERSION >= 15000))
+//libcpp 14 does not correctly support deduction guides for Span
 #     define BOOST_VECTOR_TEST_HAS_SPAN
 #endif