C++ 20

cmake/megamol_config.cmake

@@ -1,7 +1,7 @@
 # MegaMol configuration
 
 # C++ standard
-set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_C_STANDARD 99)
 
 # Warnings

core/include/mmcore/param/FilePathParam.h

@@ -92,7 +92,7 @@ class FilePathParam : public AbstractParam {
  * @return The value of the parameter as string.
  */
  std::string ValueString() const override {
- return this->value.generic_u8string();
+ return this->value.generic_string();
  }
 
  /**

core/include/mmcore/utility/FileUtils.h

@@ -138,7 +138,7 @@ bool megamol::core::utility::FileUtils::FileWithExtensionExists(const T& path_st
  try {
  if (FileUtils::FileExists<T>(path_str)) {
  auto filepath = std::filesystem::u8path(path_str);
- return (filepath.extension().generic_u8string() == std::string("." + ext));
+ return (filepath.extension().generic_string() == std::string("." + ext));
  }
  } catch (std::filesystem::filesystem_error const& e) {
  megamol::core::utility::log::Log::DefaultLog.WriteError(
@@ -151,7 +151,7 @@ bool megamol::core::utility::FileUtils::FileWithExtensionExists(const T& path_st
 template<typename T>
 bool megamol::core::utility::FileUtils::FileHasExtension(const T& path_str, const std::string& ext) {
  auto filepath = std::filesystem::u8path(path_str);
- return (filepath.extension().generic_u8string() == ext);
+ return (filepath.extension().generic_string() == ext);
 }
 
 
@@ -161,7 +161,7 @@ std::string megamol::core::utility::FileUtils::GetFileNameStem(const T& path_str
  auto filepath = std::filesystem::u8path(path_str);
  std::string filename;
  if (filepath.has_stem()) {
- filename = filepath.stem().generic_u8string();
+ filename = filepath.stem().generic_string();
  }
  return filename;
  } catch (std::filesystem::filesystem_error const& e) {
@@ -179,9 +179,9 @@ std::string megamol::core::utility::FileUtils::GetFilePathStem(const T& path_str
  std::string filename;
  if (filepath.has_stem()) {
  if (filepath.has_parent_path()) {
- filename = (filepath.parent_path() / filepath.stem()).generic_u8string();
+ filename = (filepath.parent_path() / filepath.stem()).generic_string();
  } else {
- filename = filepath.stem().generic_u8string();
+ filename = filepath.stem().generic_string();
  }
  }
  return filename;
@@ -201,7 +201,7 @@ std::string megamol::core::utility::FileUtils::SearchFileRecursive(const T& sear
  std::string found_path;
  for (const auto& entry : std::filesystem::recursive_directory_iterator(search_path)) {
  if (entry.path().filename() == file_path) {
- found_path = entry.path().generic_u8string();
+ found_path = entry.path().generic_string();
  break;
  }
  }

core/include/mmcore/utility/log/Log.inl

@@ -16,7 +16,7 @@ void Log::writeMessage(log_level level, std::string const& msg, Args&&... args)
  auto fmsg = msg;
  if constexpr (sizeof...(Args) > 0) {
  if (msg.find("%") == std::string::npos) {
- fmsg = fmt::format(msg, std::forward<Args>(args)...);
+ fmsg = fmt::format(fmt::runtime(msg), std::forward<Args>(args)...);
  } else {
  fmsg = fmt::sprintf(msg, std::forward<Args>(args)...);
  }

core/src/AbstractWriterParams.cpp

@@ -52,7 +52,7 @@ AbstractWriterParams::AbstractWriterParams(std::function<void(AbstractSlot* slot
 
 std::pair<bool, std::string> AbstractWriterParams::getNextFilename() {
  const std::string filepath_param =
- this->filePathSlot.template Param<param::FilePathParam>()->Value().generic_u8string().c_str();
+ this->filePathSlot.template Param<param::FilePathParam>()->Value().generic_string().c_str();
 
  const std::string filepath = filepath_param.find_last_of("/\\") != std::string::npos
  ? filepath_param.substr(0, filepath_param.find_last_of("/\\") + 1)

core/src/param/FilePathParam.cpp

@@ -43,7 +43,7 @@ bool FilePathParam::ParseValue(std::string const& v) {
 void FilePathParam::SetValue(const std::filesystem::path& v, bool setDirty) {
 
  try {
- auto tmp_val_str = v.generic_u8string();
+ auto tmp_val_str = v.generic_string();
  std::replace(tmp_val_str.begin(), tmp_val_str.end(), '\\', '/');
  auto new_value = std::filesystem::path(tmp_val_str);
  if (this->value != new_value) {
@@ -52,16 +52,16 @@ void FilePathParam::SetValue(const std::filesystem::path& v, bool setDirty) {
  if (error_flags & Flag_File) {
  megamol::core::utility::log::Log::DefaultLog.WriteWarn(
  "[FilePathParam] Omitting value '%s'. Expected file but directory is given.",
- new_value.generic_u8string().c_str());
+ new_value.generic_string().c_str());
  }
  if (error_flags & Flag_Directory) {
  megamol::core::utility::log::Log::DefaultLog.WriteWarn(
  "[FilePathParam] Omitting value '%s'. Expected directory but file is given.",
- new_value.generic_u8string().c_str());
+ new_value.generic_string().c_str());
  }
  if (error_flags & Internal_NoExistenceCheck) {
  megamol::core::utility::log::Log::DefaultLog.WriteWarn(
- "[FilePathParam] Omitting value '%s'. File does not exist.", new_value.generic_u8string().c_str());
+ "[FilePathParam] Omitting value '%s'. File does not exist.", new_value.generic_string().c_str());
  }
  if (error_flags & Internal_RestrictExtension) {
  std::string log_exts;
@@ -70,7 +70,7 @@ void FilePathParam::SetValue(const std::filesystem::path& v, bool setDirty) {
  }
  megamol::core::utility::log::Log::DefaultLog.WriteWarn(
  "[FilePathParam] Omitting value '%s'. File does not have required extension: %s",
- new_value.generic_u8string().c_str(), log_exts.c_str());
+ new_value.generic_string().c_str(), log_exts.c_str());
  }
  if (error_flags == 0) {
  this->value = new_value;
@@ -116,7 +116,7 @@ FilePathParam::Flags_t FilePathParam::ValidatePath(const std::filesystem::path&
  if (f & FilePathParam::Internal_RestrictExtension) {
  bool valid_ext = false;
  for (auto& ext : e) {
- if (p.extension().generic_u8string() == std::string("." + ext)) {
+ if (p.extension().generic_string() == std::string("." + ext)) {
  valid_ext = true;
  }
  }

core/src/utility/graphics/ScreenShotComments.cpp

@@ -86,7 +86,7 @@ std::string mcu_graphics::ScreenShotComments::GetProjectFromPNG(const std::files
  if (fp == nullptr) {
  megamol::core::utility::log::Log::DefaultLog.WriteError(
  "ScreenShotComments::GetProjectFromPNG: Unable to open png file \"%s\"",
- filename.generic_u8string().c_str());
+ filename.generic_string().c_str());
  } else {
  png_infop info = png_create_info_struct(png);
  if (!info) {

frontend/main/src/CLIConfigParsing.cpp

@@ -53,7 +53,7 @@ std::pair<RuntimeConfig, GlobalValueStore> megamol::frontend::handle_cli_and_con
  const int argc, const char** argv, megamol::core::LuaAPI& lua) {
  RuntimeConfig config;
 
- config.megamol_executable_directory = getExecutableDirectory().u8string();
+ config.megamol_executable_directory = getExecutableDirectory().string();
 
  // config files are already checked to exist in file system
  config.configuration_files = extract_config_file_paths(argc, argv);

frontend/services/gui/src/GUIManager.cpp

@@ -601,7 +601,7 @@ bool megamol::gui::GUIManager::SynchronizeGraphs(megamol::core::MegaMolGraph& me
  }
  if (!script_filename.empty()) {
  auto script_path = std::filesystem::u8path(script_filename);
- graph_ptr->SetFilename(script_path.generic_u8string(), false);
+ graph_ptr->SetFilename(script_path.generic_string(), false);
  }
  }
 
@@ -1556,7 +1556,7 @@ bool megamol::gui::GUIManager::create_unique_screenshot_filename(std::string& in
  filename + id_separator + std::to_string(this->gui_state.screenshot_filepath_id) + ".png";
  }
  } while (megamol::core::utility::FileUtils::FileExists<std::string>(ret_filepath));
- inout_filepath = std::filesystem::u8path(ret_filepath).generic_u8string();
+ inout_filepath = std::filesystem::u8path(ret_filepath).generic_string();
  created_filepath = true;
  }
  return created_filepath;

frontend/services/gui/src/graph/Parameter.cpp

@@ -1450,7 +1450,7 @@ bool megamol::gui::Parameter::widget_filepath(megamol::gui::Parameter::WidgetSco
  if (scope == megamol::gui::Parameter::WidgetScope::LOCAL) {
  ImGui::BeginGroup();
  if (!std::holds_alternative<std::string>(this->gui_widget_value)) {
- this->gui_widget_value = val.generic_u8string();
+ this->gui_widget_value = val.generic_string();
  }
  ImGuiStyle& style = ImGui::GetStyle();
 
@@ -1487,21 +1487,21 @@ bool megamol::gui::Parameter::widget_filepath(megamol::gui::Parameter::WidgetSco
  auto error_flags = FilePathParam::ValidatePath(val, file_extensions, file_flags);
  if (error_flags & FilePathParam::FilePathParam::Flag_File) {
  this->gui_popup_msg =
- "Omitting value '" + val.generic_u8string() + "'. Expected file but directory is given.";
+ "Omitting value '" + val.generic_string() + "'. Expected file but directory is given.";
  }
  if (error_flags & FilePathParam::Flag_Directory) {
  this->gui_popup_msg =
- "Omitting value '" + val.generic_u8string() + "'. Expected directory but file is given.";
+ "Omitting value '" + val.generic_string() + "'. Expected directory but file is given.";
  }
  if (error_flags & FilePathParam::Internal_NoExistenceCheck) {
- this->gui_popup_msg = "Omitting value '" + val.generic_u8string() + "'. File does not exist.";
+ this->gui_popup_msg = "Omitting value '" + val.generic_string() + "'. File does not exist.";
  }
  if (error_flags & FilePathParam::Internal_RestrictExtension) {
  std::string log_exts;
  for (auto& ext : file_extensions) {
  log_exts += "'." + ext + "' ";
  }
- this->gui_popup_msg = "Omitting value '" + val.generic_u8string() +
+ this->gui_popup_msg = "Omitting value '" + val.generic_string() +
  "'. File does not have required extension: " + log_exts;
  }
  if (error_flags != 0) {
@@ -1520,7 +1520,7 @@ bool megamol::gui::Parameter::widget_filepath(megamol::gui::Parameter::WidgetSco
  this->filepath_scroll_xmax = true;
  retval = true;
  } else if (!ImGui::IsItemActive() && !ImGui::IsItemEdited()) {
- this->gui_widget_value = val.generic_u8string();
+ this->gui_widget_value = val.generic_string();
  }
  ImGui::PopItemWidth();
 

frontend/services/gui/src/widgets/FileBrowserWidget.cpp

@@ -133,7 +133,7 @@ bool megamol::gui::FileBrowserWidget::popup(FileBrowserWidget::DialogMode mode,
  // Path ---------------------------------------------------
  auto last_file_path_str = this->current_directory_str;
  if (ImGui::ArrowButton("arrow_home_dir", ImGuiDir_Right)) {
- this->current_directory_str = std::filesystem::current_path().generic_u8string();
+ this->current_directory_str = std::filesystem::current_path().generic_string();
  }
  this->tooltip.ToolTip("Working Directory", ImGui::GetID("arrow_home_dir"), 0.5f, 5.0f);
  ImGui::SameLine();
@@ -198,16 +198,16 @@ bool megamol::gui::FileBrowserWidget::popup(FileBrowserWidget::DialogMode mode,
 
  // Sort path and file names case insensitive alphabetically ascending
  std::sort(paths.begin(), paths.end(), [&](ChildData_t const& a, ChildData_t const& b) {
- std::string a_str = a.first.filename().generic_u8string();
+ std::string a_str = a.first.filename().generic_string();
  core::utility::string::ToUpperAscii(a_str);
- std::string b_str = b.first.filename().generic_u8string();
+ std::string b_str = b.first.filename().generic_string();
  core::utility::string::ToUpperAscii(b_str);
  return (a_str < b_str);
  });
  std::sort(files.begin(), files.end(), [&](ChildData_t const& a, ChildData_t const& b) {
- std::string a_str = a.first.filename().generic_u8string();
+ std::string a_str = a.first.filename().generic_string();
  core::utility::string::ToUpperAscii(a_str);
- std::string b_str = b.first.filename().generic_u8string();
+ std::string b_str = b.first.filename().generic_string();
  core::utility::string::ToUpperAscii(b_str);
  return (a_str < b_str);
  });
@@ -225,7 +225,7 @@ bool megamol::gui::FileBrowserWidget::popup(FileBrowserWidget::DialogMode mode,
  // Files and directories ----------------
  for (const auto& path_pair : this->child_directories) {
 
- auto select_label = path_pair.first.filename().generic_u8string();
+ auto select_label = path_pair.first.filename().generic_string();
  bool showSearchedParameter = true;
  if (!currentSearchString.empty()) {
  showSearchedParameter =
@@ -240,7 +240,7 @@ bool megamol::gui::FileBrowserWidget::popup(FileBrowserWidget::DialogMode mode,
  if (ImGui::Selectable(
  select_label.c_str(), (select_label == this->current_file_str), select_flags)) {
  last_file_path_str = this->current_directory_str;
- auto new_path = path_pair.first.generic_u8string();
+ auto new_path = path_pair.first.generic_string();
  this->validate_split_path(
  new_path, flags, this->current_directory_str, this->current_file_str);
  this->validate_file(
@@ -351,7 +351,7 @@ bool megamol::gui::FileBrowserWidget::popup(FileBrowserWidget::DialogMode mode,
  tmp_path = dir;
  }
  }
- inout_filename = tmp_path.generic_u8string();
+ inout_filename = tmp_path.generic_string();
  inout_save_gui_state = this->save_gui_state;
  inout_save_all_param_values = this->save_all_param_values;
  ImGui::CloseCurrentPopup();
@@ -397,29 +397,29 @@ bool megamol::gui::FileBrowserWidget::validate_split_path(
 
  if ((flags & FilePathParam::Flag_Any) == FilePathParam::Flag_Any) {
  if ((status_known(status(out_path)) && is_directory(out_path))) {
- out_dir = out_path.generic_u8string();
- out_file = out_path.filename().generic_u8string();
+ out_dir = out_path.generic_string();
+ out_file = out_path.filename().generic_string();
  } else {
- out_dir = out_path.parent_path().generic_u8string();
- out_file = out_path.filename().generic_u8string();
+ out_dir = out_path.parent_path().generic_string();
+ out_file = out_path.filename().generic_string();
  }
  } else if (flags & FilePathParam::Flag_File) {
  if ((status_known(status(out_path)) && is_directory(out_path))) {
- out_dir = out_path.generic_u8string();
+ out_dir = out_path.generic_string();
  if (!(flags & FilePathParam::Internal_NoExistenceCheck)) {
  out_file.clear();
  }
  } else {
- out_dir = out_path.parent_path().generic_u8string();
- out_file = out_path.filename().generic_u8string();
+ out_dir = out_path.parent_path().generic_string();
+ out_file = out_path.filename().generic_string();
  }
  } else if (flags & FilePathParam::Flag_Directory) {
  if ((status_known(status(out_path)) && is_directory(out_path))) {
- out_dir = out_path.generic_u8string();
- out_file = out_path.filename().generic_u8string();
+ out_dir = out_path.generic_string();
+ out_file = out_path.filename().generic_string();
  } else {
- out_dir = out_path.parent_path().generic_u8string();
- out_file = out_path.filename().generic_u8string();
+ out_dir = out_path.parent_path().generic_string();
+ out_file = out_path.filename().generic_string();
  }
  }
  if (out_dir.empty()) {
@@ -533,7 +533,7 @@ std::string FileBrowserWidget::get_parent_path(const std::string& dir) const {
  auto retdir = this->get_absolute_path(dir);
  auto parent_dir = std::filesystem::u8path(retdir);
  if (parent_dir.has_parent_path() && parent_dir.has_relative_path()) {
- retdir = parent_dir.parent_path().generic_u8string();
+ retdir = parent_dir.parent_path().generic_string();
  }
  return retdir;
  } catch (std::filesystem::filesystem_error& e) {
@@ -548,18 +548,18 @@ std::string megamol::gui::FileBrowserWidget::get_absolute_path(const std::string
 
  try {
  auto retval = std::filesystem::u8path(dir);
- if ((retval.generic_u8string() == "..") || (retval.generic_u8string() == ".")) {
+ if ((retval.generic_string() == "..") || (retval.generic_string() == ".")) {
  retval = absolute(retval);
 #if (_MSC_VER < 1916) /// XXX Fixed/No more required since VS 2019
  if (retval.has_parent_path()) {
  retval = retval.parent_path();
- if ((retval.generic_u8string() == "..") && retval.has_parent_path()) {
+ if ((retval.generic_string() == "..") && retval.has_parent_path()) {
  retval = retval.parent_path();
  }
  }
 #endif // _MSC_VER > 1916
  }
- return retval.generic_u8string();
+ return retval.generic_string();
  } catch (std::filesystem::filesystem_error& e) {
  megamol::core::utility::log::Log::DefaultLog.WriteError(
  "[GUI] Filesystem Error: %s [%s, %s, line %d]\n", e.what(), __FILE__, __FUNCTION__, __LINE__);