From e92eae9eb24c3ba066fc8c4b213608ea2d216d5a Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Tue, 20 Sep 2022 21:17:41 +0300
Subject: [PATCH] Treat char8_t and std::byte as char types in hash_range

---
 include/boost/container_hash/detail/hash_range.hpp | 8 ++++++++
 test/hash_container_test.cpp                       | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/include/boost/container_hash/detail/hash_range.hpp b/include/boost/container_hash/detail/hash_range.hpp
index 4388870..28fd239 100644
--- a/include/boost/container_hash/detail/hash_range.hpp
+++ b/include/boost/container_hash/detail/hash_range.hpp
@@ -27,6 +27,14 @@ template<> struct is_char_type<char>: public boost::true_type {};
 template<> struct is_char_type<signed char>: public boost::true_type {};
 template<> struct is_char_type<unsigned char>: public boost::true_type {};
 
+#if defined(__cpp_char8_t) && __cpp_char8_t >= 201811L
+template<> struct is_char_type<char8_t>: public boost::true_type {};
+#endif
+
+#if defined(__cpp_lib_byte) && __cpp_lib_byte >= 201603L
+template<> struct is_char_type<std::byte>: public boost::true_type {};
+#endif
+
 #endif
 
 template<class It>
diff --git a/test/hash_container_test.cpp b/test/hash_container_test.cpp
index f24c3d5..efb62f2 100644
--- a/test/hash_container_test.cpp
+++ b/test/hash_container_test.cpp
@@ -48,5 +48,13 @@ int main()
     test<float>();
     test<double>();
 
+#if defined(__cpp_char8_t) && __cpp_char8_t >= 201811L
+    test<char8_t>();
+#endif
+
+#if defined(__cpp_lib_byte) && __cpp_lib_byte >= 201603L
+    test<std::byte>();
+#endif
+
     return boost::report_errors();
 }