Introduce fsyspath subclass of std::filesystem::path.

Our std::strings are UTF-8 encoded, so conversion from std::string to
std::filesystem::path must use UTF-8 decoding. The native Windows
std::filesystem::path constructor and assignment operator accepting
std::string use "native narrow encoding," which mangles path strings
containing UTF-8 encoded non-ASCII characters.

fsyspath's std::string constructor and assignment operator explicitly engage
std::filesystem::u8path() to handle encoding. u8path() is deprecated in C++20,
but once we adapt fsyspath's conversion to C++20 conventions, consuming code
need not be modified.

1 files changed, 2 insertions, 2 deletions

diff --git a/indra/llcommon/lua_function.h b/indra/llcommon/lua_function.h
index 785aadeb0c..ec1e6cdb10 100644
--- a/indra/llcommon/lua_function.h
+++ b/indra/llcommon/lua_function.h
@@ -16,9 +16,9 @@
 #include "luau/lua.h"
 #include "luau/luaconf.h"
 #include "luau/lualib.h"
+#include "fsyspath.h"
 #include "stringize.h"
 #include <exception>                // std::uncaught_exceptions()
-#include <filesystem>
 #include <memory>                   // std::shared_ptr
 #include <utility>                  // std::pair
 
@@ -51,7 +51,7 @@ namespace lluau
     int dostring(lua_State* L, const std::string& desc, const std::string& text);
     int loadstring(lua_State* L, const std::string& desc, const std::string& text);
 
-    std::filesystem::path source_path(lua_State* L);
+    fsyspath source_path(lua_State* L);
 } // namespace lluau
 
 std::string lua_tostdstring(lua_State* L, int index);