From e5ad1cd2144cfedf0418a30a125bf057734150f0 Mon Sep 17 00:00:00 2001
From: elsid <elsid.mail@gmail.com>
Date: Fri, 21 Feb 2025 19:14:18 +0100
Subject: [PATCH] Do not use no longer supported std::char_traits

/usr/bin/../include/c++/v1/string_view:300:42: error: implicit instantiation of undefined template 'std::char_traits<signed char>'
  300 |   static_assert(is_same<_CharT, typename traits_type::char_type>::value,
      |                                          ^
/home/elsid/dev/openmw/components/to_utf8/to_utf8.cpp:55:41: note: in instantiation of template class 'std::basic_string_view<signed char>' requested here
   55 |     std::basic_string_view<signed char> getTranslationArray(FromType sourceEncoding)
      |                                         ^
/usr/bin/../include/c++/v1/__fwd/string.h:23:29: note: template is declared here
   23 | struct _LIBCPP_TEMPLATE_VIS char_traits;
      |                             ^

std::char_traits support for non char types was removed from libc++19:
https://reviews.llvm.org/D157058.
---
 components/to_utf8/to_utf8.cpp | 2 +-
 components/to_utf8/to_utf8.hpp | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/components/to_utf8/to_utf8.cpp b/components/to_utf8/to_utf8.cpp
index 15fb8b26c0..7e34147b1c 100644
--- a/components/to_utf8/to_utf8.cpp
+++ b/components/to_utf8/to_utf8.cpp
@@ -52,7 +52,7 @@ namespace
         return std::find_if(input.begin(), input.end(), [](unsigned char v) { return v == 0 || v >= 128; });
     }
 
-    std::basic_string_view<signed char> getTranslationArray(FromType sourceEncoding)
+    std::span<const signed char> getTranslationArray(FromType sourceEncoding)
     {
         switch (sourceEncoding)
         {
diff --git a/components/to_utf8/to_utf8.hpp b/components/to_utf8/to_utf8.hpp
index 80af6586c9..0dde0fced6 100644
--- a/components/to_utf8/to_utf8.hpp
+++ b/components/to_utf8/to_utf8.hpp
@@ -2,6 +2,7 @@
 #define COMPONENTS_TOUTF8_H
 
 #include <cstring>
+#include <span>
 #include <string>
 #include <string_view>
 #include <utility>
@@ -50,7 +51,7 @@ namespace ToUTF8
         inline void copyFromArrayLegacyEnc(
             std::string_view::iterator& chp, std::string_view::iterator end, char*& out) const;
 
-        const std::basic_string_view<signed char> mTranslationArray;
+        const std::span<const signed char> mTranslationArray;
     };
 
     class Utf8Encoder