Building using C++20 on Windows

CHANGELOG.md

@@ -24,6 +24,7 @@
 * Fixed `Table::remove_object_recursive` which wouldn't recursively follow links through a single `Mixed` property. This feature is exposed publicly on `Table` but no SDK currently uses it, so this is considered internal. ([#7829](https://github.com/realm/realm-core/issues/7829), likely since the introduction of Mixed)
 * Upload completion is now tracked in a multiprocess-compatible manner ([PR #7796](https://github.com/realm/realm-core/pull/7796)).
 * The local realm will assume the the client file ident of the fresh realm during a client reset. ([PR #7850](https://github.com/realm/realm-core/pull/7850))
+* Building using C++20 on Windows.
 
 ----------------------------------------------
 

src/realm/util/file.cpp

@@ -340,7 +340,11 @@ std::string make_temp_dir()
         }
         break;
     }
+#if __cplusplus < 202002L
     return path.u8string();
+#else
+    return path.string();
+#endif
 
 #else // POSIX.1-2008 version
 
@@ -374,7 +378,11 @@ std::string make_temp_file(const char* prefix)
         throw SystemError(error, get_last_error_msg("GetTempFileName() failed: ", error));
     }
 
+#ifdef __cplusplus < 202002L
     return std::filesystem::path(buffer).u8string();
+#else
+    return std::filesystem::path(buffer).string();
+#endif
 
 #else // POSIX.1-2008 version
 
@@ -1573,7 +1581,11 @@ std::string File::get_path() const
 std::string File::resolve(const std::string& path, const std::string& base_dir)
 {
 #if REALM_HAVE_STD_FILESYSTEM
+#ifdef __cplusplus < 202002L
     return (u8path(base_dir) / u8path(path)).lexically_normal().u8string();
+#else
+    return (u8path(base_dir) / u8path(path)).lexically_normal().string();
+#endif
 #else
     char dir_sep = '/';
     std::string path_2 = path;
@@ -1615,7 +1627,11 @@ std::string File::resolve(const std::string& path, const std::string& base_dir)
 std::string File::parent_dir(const std::string& path)
 {
 #if REALM_HAVE_STD_FILESYSTEM
+#ifdef __cplusplus < 202002L
     return u8path(path).parent_path().u8string(); // Throws
+#else
+    return u8path(path).parent_path().string(); // Throws
+#endif
 #else
     auto is_sep = [](char c) -> bool {
         return c == '/' || c == '\\';
@@ -1864,7 +1880,11 @@ bool DirScanner::next(std::string& name)
     const std::filesystem::directory_iterator end;
     if (m_iterator == end)
         return false;
+#ifdef __cplusplus < 202002L
     name = m_iterator->path().filename().u8string();
+#else
+    name = m_iterator->path().filename().string();
+#endif
     m_iterator++;
     return true;
 }