HackStudio: Use new format functions.

Author: https://github.com/asynts
Commit: https://github.com/SerenityOS/serenity/commit/7c4fb2b8047
Pull-request: https://github.com/SerenityOS/serenity/pull/3731

DevTools/HackStudio/CursorTool.cpp

@@ -38,7 +38,7 @@ namespace HackStudio {
 void CursorTool::on_mousedown(GUI::MouseEvent& event)
 {
 #ifdef DEBUG_CURSOR_TOOL
-    dbg() << "CursorTool::on_mousedown";
+    dbgln("CursorTool::on_mousedown");
 #endif
     auto& form_widget = m_editor.form_widget();
     auto result = form_widget.hit_test(event.position(), GUI::Widget::ShouldRespectGreediness::No);
@@ -77,7 +77,7 @@ void CursorTool::on_mousedown(GUI::MouseEvent& event)
 void CursorTool::on_mouseup(GUI::MouseEvent& event)
 {
 #ifdef DEBUG_CURSOR_TOOL
-    dbg() << "CursorTool::on_mouseup";
+    dbgln("CursorTool::on_mouseup");
 #endif
     if (event.button() == GUI::MouseButton::Left) {
         auto& form_widget = m_editor.form_widget();
@@ -98,7 +98,7 @@ void CursorTool::on_mouseup(GUI::MouseEvent& event)
 void CursorTool::on_mousemove(GUI::MouseEvent& event)
 {
 #ifdef DEBUG_CURSOR_TOOL
-    dbg() << "CursorTool::on_mousemove";
+    dbgln("CursorTool::on_mousemove");
 #endif
     auto& form_widget = m_editor.form_widget();
 
@@ -137,7 +137,7 @@ void CursorTool::on_mousemove(GUI::MouseEvent& event)
 void CursorTool::on_keydown(GUI::KeyEvent& event)
 {
 #ifdef DEBUG_CURSOR_TOOL
-    dbg() << "CursorTool::on_keydown";
+    dbgln("CursorTool::on_keydown");
 #endif
 
     auto move_selected_widgets_by = [this](int x, int y) {

DevTools/HackStudio/Debugger/BacktraceModel.cpp

@@ -59,7 +59,7 @@ Vector<BacktraceModel::FrameInfo> BacktraceModel::create_backtrace(const Debug::
     do {
         String name = debug_session.debug_info().name_of_containing_function(current_instruction);
         if (name.is_null()) {
-            dbg() << "BacktraceModel: couldn't find containing function for address: " << (void*)current_instruction;
+            dbgln("BacktraceModel: couldn't find containing function for address: {:p}", current_instruction);
             name = "<missing>";
         }
 

DevTools/HackStudio/Debugger/DebugInfoWidget.cpp

@@ -164,7 +164,7 @@ void DebugInfoWidget::update_state(const Debug::DebugSession& debug_session, con
     }
     auto selected_index = m_backtrace_view->model()->index(0);
     if (!selected_index.is_valid()) {
-        dbg() << "Warning: DebugInfoWidget: backtrace selected index is invalid";
+        dbgln("Warning: DebugInfoWidget: backtrace selected index is invalid");
         return;
     }
     m_backtrace_view->selection().set(selected_index);

DevTools/HackStudio/Debugger/Debugger.cpp

@@ -78,7 +78,7 @@ void Debugger::on_breakpoint_change(const String& file, size_t line, BreakpointC
 
     auto address = session->debug_info().get_instruction_from_source(position.file_path, position.line_number);
     if (!address.has_value()) {
-        dbg() << "Warning: couldn't get instruction address from source";
+        dbgln("Warning: couldn't get instruction address from source");
         // TODO: Currently, the GUI will indicate that a breakpoint was inserted/removed at this line,
         // regardless of whether we actually succeeded to insert it. (For example a breakpoint on a comment, or an include statement).
         // We should indicate failure via a return value from this function, and not update the breakpoint GUI if we fail.
@@ -97,7 +97,7 @@ void Debugger::on_breakpoint_change(const String& file, size_t line, BreakpointC
 Debug::DebugInfo::SourcePosition Debugger::create_source_position(const String& file, size_t line)
 {
     if (!file.starts_with('/') && !file.starts_with("./"))
-        return { String::format("./%s", file.characters()), line + 1 };
+        return { String::formatted("./{}", file), line + 1 };
     return { file, line + 1 };
 }
 
@@ -113,13 +113,13 @@ void Debugger::start()
     ASSERT(!!m_debug_session);
 
     for (const auto& breakpoint : m_breakpoints) {
-        dbg() << "insertig breakpoint at: " << breakpoint.file_path << ":" << breakpoint.line_number;
+        dbgln("insertig breakpoint at: {}:{}", breakpoint.file_path, breakpoint.line_number);
         auto address = m_debug_session->debug_info().get_instruction_from_source(breakpoint.file_path, breakpoint.line_number);
         if (address.has_value()) {
             bool success = m_debug_session->insert_breakpoint(reinterpret_cast<void*>(address.value()));
             ASSERT(success);
         } else {
-            dbg() << "couldn't insert breakpoint";
+            dbgln("couldn't insert breakpoint");
         }
     }
 
@@ -132,7 +132,7 @@ int Debugger::debugger_loop()
 
     m_debug_session->run([this](Debug::DebugSession::DebugBreakReason reason, Optional<PtraceRegisters> optional_regs) {
         if (reason == Debug::DebugSession::DebugBreakReason::Exited) {
-            dbg() << "Program exited";
+            dbgln("Program exited");
             m_on_exit_callback();
             return Debug::DebugSession::DebugDecision::Detach;
         }
@@ -183,7 +183,7 @@ int Debugger::debugger_loop()
             // NOTE: Is detaching from the debuggee the best thing to do here?
             // We could display a dialog in the UI, remind the user that there is
             // a live debugged process, and ask whether they want to terminate/detach.
-            dbg() << "Debugger exiting";
+            dbgln("Debugger exiting");
             return Debug::DebugSession::DebugDecision::Detach;
         }
         ASSERT_NOT_REACHED();

DevTools/HackStudio/Debugger/DisassemblyModel.cpp

@@ -40,7 +40,7 @@ DisassemblyModel::DisassemblyModel(const Debug::DebugSession& debug_session, con
 {
     auto containing_function = debug_session.debug_info().get_containing_function(regs.eip);
     if (!containing_function.has_value()) {
-        dbg() << "Cannot disassemble as the containing function was not found.";
+        dbgln("Cannot disassemble as the containing function was not found.");
         return;
     }
 
@@ -110,12 +110,11 @@ GUI::Variant DisassemblyModel::data(const GUI::ModelIndex& index, GUI::ModelRole
 
     if (role == GUI::ModelRole::Display) {
         if (index.column() == Column::Address)
-            return String::format("%#08x", insn.address);
+            return String::formatted("{:p}", insn.address);
         if (index.column() == Column::InstructionBytes) {
             StringBuilder builder;
-            for (auto ch : insn.bytes) {
+            for (auto ch : insn.bytes)
-                builder.appendf("%02x ", (u8)ch);
+                builder.appendff("{:02x} ", static_cast<unsigned char>(ch));
-            }
             return builder.to_string();
         }
         if (index.column() == Column::Disassembly)

DevTools/HackStudio/Debugger/RegistersModel.cpp

@@ -107,7 +107,7 @@ GUI::Variant RegistersModel::data(const GUI::ModelIndex& index, GUI::ModelRole r
         if (index.column() == Column::Register)
             return reg.name;
         if (index.column() == Column::Value)
-            return String::format("%#08x", reg.value);
+            return String::formatted("{:08x}", reg.value);
         return {};
     }
     return {};

DevTools/HackStudio/Debugger/VariablesModel.cpp

@@ -84,19 +84,19 @@ static String variable_value_as_string(const Debug::DebugInfo::VariableInfo& var
             return enumerator->constant_data.as_u32 == enumerator_value;
         });
         ASSERT(!it.is_end());
-        return String::format("%s::%s", variable.type_name.characters(), (*it)->name.characters());
+        return String::formatted("{}::{}", variable.type_name, (*it)->name);
     }
 
     if (variable.type_name == "int") {
         auto value = Debugger::the().session()->peek((u32*)variable_address);
         ASSERT(value.has_value());
-        return String::format("%d", static_cast<int>(value.value()));
+        return String::formatted("{}", static_cast<int>(value.value()));
     }
 
     if (variable.type_name == "char") {
         auto value = Debugger::the().session()->peek((u32*)variable_address);
         ASSERT(value.has_value());
-        return String::format("'%c' (%d)", static_cast<char>(value.value()), static_cast<char>(value.value()));
+        return String::formatted("'{0:c}' ({0:d})", value.value());
     }
 
     if (variable.type_name == "bool") {
@@ -105,13 +105,13 @@ static String variable_value_as_string(const Debug::DebugInfo::VariableInfo& var
         return (value.value() & 1) ? "true" : "false";
     }
 
-    return String::format("type: %s @ %08x, ", variable.type_name.characters(), variable_address);
+    return String::formatted("type: {} @ {:p}, ", variable.type_name, variable_address);
 }
 
 static Optional<u32> string_to_variable_value(const StringView& string_value, const Debug::DebugInfo::VariableInfo& variable)
 {
     if (variable.is_enum_type()) {
-        auto prefix_string = String::format("%s::", variable.type_name.characters());
+        auto prefix_string = String::formatted("{}::", variable.type_name);
         auto string_to_use = string_value;
         if (string_value.starts_with(prefix_string))
             string_to_use = string_value.substring_view(prefix_string.length(), string_value.length() - prefix_string.length());
@@ -155,8 +155,9 @@ void VariablesModel::set_variable_value(const GUI::ModelIndex& index, const Stri
         return;
     }
 
-    GUI::MessageBox::show(parent_window,
+    GUI::MessageBox::show(
-        String::format("String value \"%s\" could not be converted to a value of type %s.", string_value.to_string().characters(), variable->type_name.characters()),
+        parent_window,
+        String::formatted("String value \"{}\" could not be converted to a value of type {}.", string_value, variable->type_name),
         "Set value failed",
         GUI::MessageBox::Type::Error);
 }
@@ -167,7 +168,7 @@ GUI::Variant VariablesModel::data(const GUI::ModelIndex& index, GUI::ModelRole r
     switch (role) {
     case GUI::ModelRole::Display: {
         auto value_as_string = variable_value_as_string(*variable);
-        return String::format("%s: %s", variable->name.characters(), value_as_string.characters());
+        return String::formatted("{}: {}", variable->name, value_as_string);
     }
     case GUI::ModelRole::Icon:
         return m_variable_icon;

DevTools/HackStudio/Editor.cpp

@@ -142,7 +142,7 @@ static HashMap<String, String>& man_paths()
         // FIXME: This should also search man3, possibly other places..
         Core::DirIterator it("/usr/share/man/man2", Core::DirIterator::Flags::SkipDots);
         while (it.has_next()) {
-            auto path = String::format("/usr/share/man/man2/%s", it.next_path().characters());
+            auto path = String::formatted("/usr/share/man/man2/{}", it.next_path());
             auto title = LexicalPath(path).title();
             paths.set(title, path);
         }
@@ -156,7 +156,7 @@ void Editor::show_documentation_tooltip_if_available(const String& hovered_token
     auto it = man_paths().find(hovered_token);
     if (it == man_paths().end()) {
 #ifdef EDITOR_DEBUG
-        dbg() << "no man path for " << hovered_token;
+        dbgln("no man path for {}", hovered_token);
 #endif
         m_documentation_tooltip_window->hide();
         return;
@@ -167,18 +167,18 @@ void Editor::show_documentation_tooltip_if_available(const String& hovered_token
     }
 
 #ifdef EDITOR_DEBUG
-    dbg() << "opening " << it->value;
+    dbgln("opening {}", it->value);
 #endif
     auto file = Core::File::construct(it->value);
     if (!file->open(Core::File::ReadOnly)) {
-        dbg() << "failed to open " << it->value << " " << file->error_string();
+        dbgln("failed to open {}, {}", it->value, file->error_string());
         return;
     }
 
     auto man_document = Markdown::Document::parse(file->read_all());
 
     if (!man_document) {
-        dbg() << "failed to parse markdown";
+        dbgln("failed to parse markdown");
         return;
     }
 
@@ -238,7 +238,7 @@ void Editor::mousemove_event(GUI::MouseEvent& event)
             adjusted_range.end().set_column(min(end_line_length, adjusted_range.end().column() + 1));
             auto hovered_span_text = document().text_in_range(adjusted_range);
 #ifdef EDITOR_DEBUG
-            dbg() << "Hovering: " << adjusted_range << " \"" << hovered_span_text << "\"";
+            dbgln("Hovering: {} \"{}\"", adjusted_range, hovered_span_text);
 #endif
 
             if (highlighter->is_navigatable(span.data)) {
@@ -305,7 +305,7 @@ void Editor::mousedown_event(GUI::MouseEvent& event)
             auto span_text = document().text_in_range(adjusted_range);
             auto header_path = span_text.substring(1, span_text.length() - 2);
 #ifdef EDITOR_DEBUG
-            dbg() << "Ctrl+click: " << adjusted_range << " \"" << header_path << "\"";
+            dbgln("Ctrl+click: {} \"{}\"", adjusted_range, header_path);
 #endif
             navigate_to_include_if_available(header_path);
             return;
@@ -392,7 +392,7 @@ static HashMap<String, String>& include_paths()
             if (!Core::File::is_directory(path)) {
                 auto key = path.substring(base.length() + 1, path.length() - base.length() - 1);
 #ifdef EDITOR_DEBUG
-                dbg() << "Adding header \"" << key << "\" in path \"" << path << "\"";
+                dbgln("Adding header \"{}\" in path \"{}\"", key, path);
 #endif
                 paths.set(key, path);
             } else {
@@ -416,7 +416,7 @@ void Editor::navigate_to_include_if_available(String path)
     auto it = include_paths().find(path);
     if (it == include_paths().end()) {
 #ifdef EDITOR_DEBUG
-        dbg() << "no header " << path << " found.";
+        dbgln("no header {} found.", path);
 #endif
         return;
     }

DevTools/HackStudio/EditorWrapper.cpp

@@ -62,7 +62,7 @@ EditorWrapper::EditorWrapper()
     m_editor->set_automatic_indentation_enabled(true);
 
     m_editor->on_cursor_change = [this] {
-        m_cursor_label->set_text(String::format("Line: %d, Column: %d", m_editor->cursor().line() + 1, m_editor->cursor().column()));
+        m_cursor_label->set_text(String::formatted("Line: {}, Column: {}", m_editor->cursor().line() + 1, m_editor->cursor().column()));
     };
 
     m_editor->on_focus = [this] {

DevTools/HackStudio/Git/DiffViewer.cpp

@@ -161,9 +161,8 @@ void DiffViewer::set_content(const String& original, const String& diff)
     m_hunks = Diff::parse_hunks(diff);
 
 #ifdef DEBUG_DIFF
-    for (size_t i = 0; i < m_original_lines.size(); ++i) {
+    for (size_t i = 0; i < m_original_lines.size(); ++i)
-        dbg() << i << ":" << m_original_lines[i];
+        dbgln("{}:{}", i, m_original_lines[i]);
-    }
 #endif
 }
 

DevTools/HackStudio/Git/GitRepo.cpp

@@ -132,7 +132,7 @@ bool GitRepo::commit(const String& message)
 
 Optional<String> GitRepo::original_file_content(const LexicalPath& file) const
 {
-    return command({ "show", String::format("HEAD:%s", file.string().characters()) });
+    return command({ "show", String::formatted("HEAD:{}", file) });
 }
 
 Optional<String> GitRepo::unstaged_diff(const LexicalPath& file) const

DevTools/HackStudio/Git/GitWidget.cpp

@@ -128,7 +128,7 @@ bool GitWidget::initialize_if_needed()
 void GitWidget::refresh()
 {
     if (!initialize_if_needed()) {
-        dbg() << "GitWidget initialization failed";
+        dbgln("GitWidget initialization failed");
         return;
     }
 
@@ -140,7 +140,7 @@ void GitWidget::refresh()
 
 void GitWidget::stage_file(const LexicalPath& file)
 {
-    dbg() << "staging: " << file.string();
+    dbgln("staging: {}", file);
     bool rc = m_git_repo->stage(file);
     ASSERT(rc);
     refresh();
@@ -148,7 +148,7 @@ void GitWidget::stage_file(const LexicalPath& file)
 
 void GitWidget::unstage_file(const LexicalPath& file)
 {
-    dbg() << "unstaging: " << file.string();
+    dbgln("unstaging: {}", file);
     bool rc = m_git_repo->unstage(file);
     ASSERT(rc);
     refresh();
@@ -160,7 +160,7 @@ void GitWidget::commit()
     auto res = GUI::InputBox::show(message, window(), "Commit message:", "Commit");
     if (res != GUI::InputBox::ExecOK || message.is_empty())
         return;
-    dbg() << "commit message: " << message;
+    dbgln("commit message: {}", message);
     m_git_repo->commit(message);
     refresh();
 }

DevTools/HackStudio/HackStudioWidget.cpp

@@ -214,7 +214,7 @@ void HackStudioWidget::open_file(const String& filename)
     }
 
     m_currently_open_file = filename;
-    window()->set_title(String::format("%s - HackStudio", m_currently_open_file.characters()));
+    window()->set_title(String::formatted("{} - HackStudio", m_currently_open_file));
     m_project_tree_view->update();
 
     current_editor_wrapper().filename_label().set_text(filename);
@@ -271,11 +271,11 @@ NonnullRefPtr<GUI::Action> HackStudioWidget::create_new_action()
             return;
         auto file = Core::File::construct(filename);
         if (!file->open((Core::IODevice::OpenMode)(Core::IODevice::WriteOnly | Core::IODevice::MustBeNew))) {
-            GUI::MessageBox::show(window(), String::format("Failed to create '%s'", filename.characters()), "Error", GUI::MessageBox::Type::Error);
+            GUI::MessageBox::show(window(), String::formatted("Failed to create '{}'", filename), "Error", GUI::MessageBox::Type::Error);
             return;
         }
         if (!m_project->add_file(filename)) {
-            GUI::MessageBox::show(window(), String::format("Failed to add '%s' to project", filename.characters()), "Error", GUI::MessageBox::Type::Error);
+            GUI::MessageBox::show(window(), String::formatted("Failed to add '{}' to project", filename), "Error", GUI::MessageBox::Type::Error);
             // FIXME: Should we unlink the file here maybe?
             return;
         }
@@ -304,7 +304,7 @@ NonnullRefPtr<GUI::Action> HackStudioWidget::create_add_existing_file_action()
             return;
         auto& filename = result.value();
         if (!m_project->add_file(filename)) {
-            GUI::MessageBox::show(window(), String::format("Failed to add '%s' to project", filename.characters()), "Error", GUI::MessageBox::Type::Error);
+            GUI::MessageBox::show(window(), String::formatted("Failed to add '{}' to project", filename), "Error", GUI::MessageBox::Type::Error);
             return;
         }
         m_project_tree_view->toggle_index(m_project_tree_view->model()->index(0, 0));
@@ -322,9 +322,9 @@ NonnullRefPtr<GUI::Action> HackStudioWidget::create_delete_action()
 
         String message;
         if (files.size() == 1) {
-            message = String::format("Really remove %s from the project?", LexicalPath(files[0]).basename().characters());
+            message = String::formatted("Really remove {} from the project?", LexicalPath(files[0]).basename());
         } else {
-            message = String::format("Really remove %d files from the project?", files.size());
+            message = String::formatted("Really remove {} files from the project?", files.size());
         }
 
         auto result = GUI::MessageBox::show(window(),
@@ -338,7 +338,7 @@ NonnullRefPtr<GUI::Action> HackStudioWidget::create_delete_action()
         for (auto& file : files) {
             if (!m_project->remove_file(file)) {
                 GUI::MessageBox::show(window(),
-                    String::format("Removing file %s from the project failed.", file.characters()),
+                    String::formatted("Removing file {} from the project failed.", file),
                     "Removal failed",
                     GUI::MessageBox::Type::Error);
                 break;
@@ -492,11 +492,11 @@ NonnullRefPtr<GUI::Action> HackStudioWidget::create_debug_action()
 {
     return GUI::Action::create("Debug", Gfx::Bitmap::load_from_file("/res/icons/16x16/debug-run.png"), [this](auto&) {
         if (m_project->type() != ProjectType::Cpp) {
-            GUI::MessageBox::show(window(), String::format("Cannot debug current project type", get_project_executable_path().characters()), "Error", GUI::MessageBox::Type::Error);
+            GUI::MessageBox::show(window(), "Cannot debug current project type", "Error", GUI::MessageBox::Type::Error);
             return;
         }
         if (!GUI::FilePicker::file_exists(get_project_executable_path())) {
-            GUI::MessageBox::show(window(), String::format("Could not find file: %s. (did you build the project?)", get_project_executable_path().characters()), "Error", GUI::MessageBox::Type::Error);
+            GUI::MessageBox::show(window(), String::formatted("Could not find file: {}. (did you build the project?)", get_project_executable_path()), "Error", GUI::MessageBox::Type::Error);
             return;
         }
         if (Debugger::the().session()) {
@@ -517,7 +517,7 @@ void HackStudioWidget::initialize_debugger()
             const auto& debug_session = *Debugger::the().session();
             auto source_position = debug_session.debug_info().get_source_position(regs.eip);
             if (!source_position.has_value()) {
-                dbg() << "Could not find source position for address: " << (void*)regs.eip;
+                dbgln("Could not find source position for address: {:p}", regs.eip);
                 return Debugger::HasControlPassedToUser::No;
             }
 
@@ -565,7 +565,7 @@ String HackStudioWidget::get_full_path_of_serenity_source(const String& file)
     relative_path_builder.join("/", path_parts);
     constexpr char SERENITY_LIBS_PREFIX[] = "/usr/src/serenity";
     LexicalPath serenity_sources_base(SERENITY_LIBS_PREFIX);
-    return String::format("%s/%s", serenity_sources_base.string().characters(), relative_path_builder.to_string().characters());
+    return String::formatted("{}/{}", serenity_sources_base, relative_path_builder.to_string());
 }
 
 NonnullRefPtr<EditorWrapper> HackStudioWidget::get_editor_of_file(const String& file_name)
@@ -593,7 +593,7 @@ String HackStudioWidget::get_project_executable_path() const
 void HackStudioWidget::build(TerminalWrapper& wrapper)
 {
     if (m_project->type() == ProjectType::JavaScript && m_currently_open_file.ends_with(".js"))
-        wrapper.run_command(String::format("js -A %s", m_currently_open_file.characters()));
+        wrapper.run_command(String::formatted("js -A {}", m_currently_open_file));
     else
         wrapper.run_command("make");
 }
@@ -601,7 +601,7 @@ void HackStudioWidget::build(TerminalWrapper& wrapper)
 void HackStudioWidget::run(TerminalWrapper& wrapper)
 {
     if (m_project->type() == ProjectType::JavaScript && m_currently_open_file.ends_with(".js"))
-        wrapper.run_command(String::format("js %s", m_currently_open_file.characters()));
+        wrapper.run_command(String::format("js {}", m_currently_open_file));
     else
         wrapper.run_command("make run");
 }
@@ -666,12 +666,8 @@ void HackStudioWidget::create_form_editor(GUI::Widget& parent)
 
     GUI::WidgetClassRegistration::for_each([&, this](const GUI::WidgetClassRegistration& reg) {
         constexpr size_t gui_namespace_prefix_length = sizeof("GUI::") - 1;
-        auto icon_path = String::format(
+        auto icon_path = String::formatted("/res/icons/hackstudio/G{}.png",
-            "/res/icons/hackstudio/G%s.png",
+            reg.class_name().substring(gui_namespace_prefix_length, reg.class_name().length() - gui_namespace_prefix_length));
-            reg.class_name().substring(
-                                gui_namespace_prefix_length,
-                                reg.class_name().length() - gui_namespace_prefix_length)
-                .characters());
         if (!Core::File::exists(icon_path))
             return;
 
@@ -898,11 +894,11 @@ HackStudioWidget::~HackStudioWidget()
     if (!m_debugger_thread.is_null()) {
         Debugger::the().set_requested_debugger_action(Debugger::DebuggerAction::Exit);
         void* retval;
-        dbg() << "Waiting for debugger thread to terminate";
+        dbgln("Waiting for debugger thread to terminate");
         int rc = pthread_join(m_debugger_thread->tid(), &retval);
         if (rc < 0) {
             perror("pthread_join");
-            dbg() << "error joining debugger thread";
+            dbgln("error joining debugger thread");
         }
     }
 }

DevTools/HackStudio/LanguageServers/Cpp/AutoComplete.cpp

@@ -46,7 +46,7 @@ Vector<AutoCompleteResponse> AutoComplete::get_suggestions(const String& code, G
 
 #ifdef DEBUG_AUTOCOMPLETE
     for (auto& suggestion : suggestions) {
-        dbg() << "suggestion: " << suggestion.completion;
+        dbgln("suggestion: {}", suggestion.completion);
     }
 #endif
 

DevTools/HackStudio/LanguageServers/Cpp/ClientConnection.cpp

@@ -57,7 +57,7 @@ OwnPtr<Messages::LanguageServer::GreetResponse> ClientConnection::handle(const M
 {
     m_project_root = LexicalPath(message.project_root());
 #ifdef DEBUG_CPP_LANGUAGE_SERVER
-    dbg() << "project_root: " << m_project_root.string();
+    dbgln("project_root: {}", m_project_root);
 #endif
     return make<Messages::LanguageServer::GreetResponse>(client_id());
 }
@@ -81,16 +81,16 @@ static DefaultDocumentClient s_default_document_client;
 
 void ClientConnection::handle(const Messages::LanguageServer::FileOpened& message)
 {
-    LexicalPath file_path(String::format("%s/%s", m_project_root.string().characters(), message.file_name().characters()));
+    LexicalPath file_path(String::formatted("{}/{}", m_project_root, message.file_name()));
 #ifdef DEBUG_CPP_LANGUAGE_SERVER
-    dbg() << "FileOpened: " << file_path.string();
+    dbgln("FileOpened: {}", file_path);
 #endif
 
     auto file = Core::File::construct(file_path.string());
     if (!file->open(Core::IODevice::ReadOnly)) {
         errno = file->error();
         perror("open");
-        dbg() << "Failed to open project file: " << file_path.string();
+        dbgln("Failed to open project file: {}", file_path);
         return;
     }
     auto content = file->read_all();
@@ -106,31 +106,31 @@ void ClientConnection::handle(const Messages::LanguageServer::FileOpened& messag
 void ClientConnection::handle(const Messages::LanguageServer::FileEditInsertText& message)
 {
 #ifdef DEBUG_CPP_LANGUAGE_SERVER
-    dbg() << "InsertText for file: " << message.file_name();
+    dbgln("InsertText for file: {}", message.file_name());
-    dbg() << "Text: " << message.text();
+    dbgln("Text: {}", message.text());
-    dbg() << "[" << message.start_line() << ":" << message.start_column() << "]";
+    dbgln("[{}:{}]", message.start_line(), message.start_column());
 #endif
     auto document = document_for(message.file_name());
     if (!document) {
-        dbg() << "file " << message.file_name() << " has not been opened";
+        dbgln("file {} has not been opened", message.file_name());
         return;
     }
     GUI::TextPosition start_position { (size_t)message.start_line(), (size_t)message.start_column() };
     document->insert_at(start_position, message.text(), &s_default_document_client);
 #ifdef DEBUG_FILE_CONTENT
-    dbg() << document->text();
+    dbgln("{}", document->text());
 #endif
 }
 
 void ClientConnection::handle(const Messages::LanguageServer::FileEditRemoveText& message)
 {
 #ifdef DEBUG_CPP_LANGUAGE_SERVER
-    dbg() << "RemoveText for file: " << message.file_name();
+    dbgln("RemoveText for file: {}", message.file_name());
-    dbg() << "[" << message.start_line() << ":" << message.start_column() << " - " << message.end_line() << ":" << message.end_column() << "]";
+    dbgln("[{}:{} - {}:{}]", message.start_line(), message.start_column(), message.end_line(), message.end_column());
 #endif
     auto document = document_for(message.file_name());
     if (!document) {
-        dbg() << "file " << message.file_name() << " has not been opened";
+        dbgln("file {} has not been opened", message.file_name());
         return;
     }
     GUI::TextPosition start_position { (size_t)message.start_line(), (size_t)message.start_column() };
@@ -143,19 +143,19 @@ void ClientConnection::handle(const Messages::LanguageServer::FileEditRemoveText
 
     document->remove(range);
 #ifdef DEBUG_FILE_CONTENT
-    dbg() << document->text();
+    dbgln("{}", document->text());
 #endif
 }
 
 void ClientConnection::handle(const Messages::LanguageServer::AutoCompleteSuggestions& message)
 {
 #ifdef DEBUG_CPP_LANGUAGE_SERVER
-    dbg() << "AutoCompleteSuggestions for: " << message.file_name() << " " << message.cursor_line() << ":" << message.cursor_column();
+    dbgln("AutoCompleteSuggestions for: {} {}:{}", message.file_name(), message.cursor_line(), message.cursor_column());
 #endif
 
     auto document = document_for(message.file_name());
     if (!document) {
-        dbg() << "file " << message.file_name() << " has not been opened";
+        dbgln("file {} has not been opened", message.file_name());
         return;
     }
 
@@ -176,7 +176,7 @@ void ClientConnection::handle(const Messages::LanguageServer::SetFileContent& me
 {
     auto document = document_for(message.file_name());
     if (!document) {
-        dbg() << "file " << message.file_name() << " has not been opened";
+        dbgln("file {} has not been opened", message.file_name());
         return;
     }
     auto content = message.content();

DevTools/HackStudio/LanguageServers/Shell/AutoComplete.cpp

@@ -43,16 +43,16 @@ Vector<AutoCompleteResponse> AutoComplete::get_suggestions(const String& code, s
         return {};
 
 #ifdef DEBUG_AUTOCOMPLETE
-    dbg() << "Complete '" << code << "': ";
+    dbgln("Complete '{}'", code);
     ast->dump(1);
-    dbg() << "At offset " << offset;
+    dbgln("At offset {}", offset);
 #endif
 
     auto result = ast->complete_for_editor(m_shell, offset);
     Vector<AutoCompleteResponse> completions;
     for (auto& entry : result) {
 #ifdef DEBUG_AUTOCOMPLETE
-        dbg() << "Suggestion: '" << entry.text_string << "' starting at " << entry.input_offset;
+        dbgln("Suggestion: '{}' starting at {}", entry.text_string, entry.input_offset);
 #endif
         completions.append({ entry.text_string, entry.input_offset });
     }

DevTools/HackStudio/LanguageServers/Shell/ClientConnection.cpp

@@ -57,7 +57,7 @@ OwnPtr<Messages::LanguageServer::GreetResponse> ClientConnection::handle(const M
 {
     m_project_root = LexicalPath(message.project_root());
 #ifdef DEBUG_SH_LANGUAGE_SERVER
-    dbg() << "project_root: " << m_project_root.string();
+    dbgln("project_root: {}", m_project_root);
 #endif
     return make<Messages::LanguageServer::GreetResponse>(client_id());
 }
@@ -81,16 +81,16 @@ static DefaultDocumentClient s_default_document_client;
 
 void ClientConnection::handle(const Messages::LanguageServer::FileOpened& message)
 {
-    LexicalPath file_path(String::format("%s/%s", m_project_root.string().characters(), message.file_name().characters()));
+    LexicalPath file_path(String::formatted("{}/{}", m_project_root, message.file_name()));
 #ifdef DEBUG_SH_LANGUAGE_SERVER
-    dbg() << "FileOpened: " << file_path.string();
+    dbgln("FileOpened: {}", file_path);
 #endif
 
     auto file = Core::File::construct(file_path.string());
     if (!file->open(Core::IODevice::ReadOnly)) {
         errno = file->error();
         perror("open");
-        dbg() << "Failed to open project file: " << file_path.string();
+        dbgln("Failed to open project file: {}", file_path);
         return;
     }
     auto content = file->read_all();
@@ -106,31 +106,31 @@ void ClientConnection::handle(const Messages::LanguageServer::FileOpened& messag
 void ClientConnection::handle(const Messages::LanguageServer::FileEditInsertText& message)
 {
 #ifdef DEBUG_SH_LANGUAGE_SERVER
-    dbg() << "InsertText for file: " << message.file_name();
+    dbgln("InsertText for file: {}", message.file_name());
-    dbg() << "Text: " << message.text();
+    dbgln("Text: {}", message.text());
-    dbg() << "[" << message.start_line() << ":" << message.start_column() << "]";
+    dbgln("[{}:{}]", message.start_line(), message.start_column());
 #endif
     auto document = document_for(message.file_name());
     if (!document) {
-        dbg() << "file " << message.file_name() << " has not been opened";
+        dbgln("file {} has not been opened", message.file_name());
         return;
     }
     GUI::TextPosition start_position { (size_t)message.start_line(), (size_t)message.start_column() };
     document->insert_at(start_position, message.text(), &s_default_document_client);
 #ifdef DEBUG_FILE_CONTENT
-    dbg() << document->text();
+    dbgln("{}", document->text());
 #endif
 }
 
 void ClientConnection::handle(const Messages::LanguageServer::FileEditRemoveText& message)
 {
 #ifdef DEBUG_SH_LANGUAGE_SERVER
-    dbg() << "RemoveText for file: " << message.file_name();
+    dbgln("RemoveText for file: {}", message.file_name());
-    dbg() << "[" << message.start_line() << ":" << message.start_column() << " - " << message.end_line() << ":" << message.end_column() << "]";
+    dbgln("[{}:{} - {}:{}]", message.start_line(), message.start_column(), message.end_line(), message.end_column());
 #endif
     auto document = document_for(message.file_name());
     if (!document) {
-        dbg() << "file " << message.file_name() << " has not been opened";
+        dbgln("file {} has not been opened", message.file_name());
         return;
     }
     GUI::TextPosition start_position { (size_t)message.start_line(), (size_t)message.start_column() };
@@ -150,12 +150,12 @@ void ClientConnection::handle(const Messages::LanguageServer::FileEditRemoveText
 void ClientConnection::handle(const Messages::LanguageServer::AutoCompleteSuggestions& message)
 {
 #ifdef DEBUG_SH_LANGUAGE_SERVER
-    dbg() << "AutoCompleteSuggestions for: " << message.file_name() << " " << message.cursor_line() << ":" << message.cursor_column();
+    dbgln("AutoCompleteSuggestions for: {} {}:{}", message.file_name(), message.cursor_line(), message.cursor_column());
 #endif
 
     auto document = document_for(message.file_name());
     if (!document) {
-        dbg() << "file " << message.file_name() << " has not been opened";
+        dbgln("file {} has not been opened", message.file_name());
         return;
     }
 
@@ -185,7 +185,7 @@ void ClientConnection::handle(const Messages::LanguageServer::SetFileContent& me
 {
     auto document = document_for(message.file_name());
     if (!document) {
-        dbg() << "file " << message.file_name() << " has not been opened";
+        dbgln("file {} has not been opened", message.file_name());
         return;
     }
     auto content = message.content();

DevTools/HackStudio/Locator.cpp

@@ -179,9 +179,9 @@ void Locator::update_suggestions()
         if (file.name().contains(typed_text))
             suggestions.append(file.name());
     });
-    dbg() << "I have " << suggestions.size() << " suggestion(s):";
+    dbgln("I have {} suggestion(s):", suggestions.size());
     for (auto& s : suggestions) {
-        dbg() << "    " << s;
+        dbgln("    {}", s);
     }
 
     bool has_suggestions = !suggestions.is_empty();
@@ -194,7 +194,7 @@ void Locator::update_suggestions()
         m_suggestion_view->selection().set(m_suggestion_view->model()->index(0));
 
     m_popup_window->move_to(screen_relative_rect().top_left().translated(0, -m_popup_window->height()));
-    dbg() << "Popup rect: " << m_popup_window->rect();
+    dbgln("Popup rect: {}", m_popup_window->rect());
     m_popup_window->show();
 }
 

DevTools/HackStudio/ProcessStateWidget.cpp

@@ -82,10 +82,10 @@ void ProcessStateWidget::refresh()
 
     auto& data = active_process_data.value();
 
-    m_pid_label->set_text(String::format("%s(%d)", data.name.characters(), pid));
+    m_pid_label->set_text(String::formatted("{}({})", data.name, pid));
     m_state_label->set_text(data.threads.first().state);
-    m_cpu_label->set_text(String::format("%d", data.threads.first().times_scheduled));
+    m_cpu_label->set_text(String::formatted("{}", data.threads.first().times_scheduled));
-    m_memory_label->set_text(String::format("%d", data.amount_resident));
+    m_memory_label->set_text(String::formatted("{}", data.amount_resident));
 }
 
 void ProcessStateWidget::set_tty_fd(int tty_fd)

DevTools/HackStudio/Project.cpp

@@ -353,11 +353,11 @@ void Project::rebuild_tree()
 #if 0
     Function<void(ProjectTreeNode&, int indent)> dump_tree = [&](ProjectTreeNode& node, int indent) {
         for (int i = 0; i < indent; ++i)
-            printf(" ");
+            new_out(" ");
         if (node.name.is_null())
-            printf("(null)\n");
+            outln("(null)");
         else
-            printf("%s\n", node.name.characters());
+            outln("{}", node.name);
         for (auto& child : node.children) {
             dump_tree(*child, indent + 2);
         }

DevTools/HackStudio/TerminalWrapper.cpp

@@ -76,11 +76,11 @@ void TerminalWrapper::run_command(const String& command)
             ASSERT_NOT_REACHED();
         }
         if (WIFEXITED(wstatus)) {
-            m_terminal_widget->inject_string(String::format("\033[%d;1m(Command exited with code %d)\033[0m\n", wstatus == 0 ? 32 : 31, WEXITSTATUS(wstatus)));
+            m_terminal_widget->inject_string(String::formatted("\033[{};1m(Command exited with code {})\033[0m\n", wstatus == 0 ? 32 : 31, WEXITSTATUS(wstatus)));
         } else if (WIFSTOPPED(wstatus)) {
-            m_terminal_widget->inject_string(String::format("\033[34;1m(Command stopped!)\033[0m\n"));
+            m_terminal_widget->inject_string("\033[34;1m(Command stopped!)\033[0m\n");
         } else if (WIFSIGNALED(wstatus)) {
-            m_terminal_widget->inject_string(String::format("\033[34;1m(Command signaled with %s!)\033[0m\n", strsignal(WTERMSIG(wstatus))));
+            m_terminal_widget->inject_string(String::formatted("\033[34;1m(Command signaled with {}!)\033[0m\n", strsignal(WTERMSIG(wstatus))));
         }
         m_process_state_widget->set_tty_fd(-1);
         m_pid = -1;

DevTools/HackStudio/WidgetTool.cpp

@@ -32,25 +32,25 @@ namespace HackStudio {
 void WidgetTool::on_mousedown(GUI::MouseEvent& event)
 {
     (void)event;
-    dbg() << "WidgetTool::on_mousedown";
+    dbgln("WidgetTool::on_mousedown");
 }
 
 void WidgetTool::on_mouseup(GUI::MouseEvent& event)
 {
     (void)event;
-    dbg() << "WidgetTool::on_mouseup";
+    dbgln("WidgetTool::on_mouseup");
 }
 
 void WidgetTool::on_mousemove(GUI::MouseEvent& event)
 {
     (void)event;
-    dbg() << "WidgetTool::on_mousemove";
+    dbgln("WidgetTool::on_mousemove");
 }
 
 void WidgetTool::on_keydown(GUI::KeyEvent& event)
 {
     (void)event;
-    dbg() << "WidgetTool::on_keydown";
+    dbgln("WidgetTool::on_keydown");
 }
 
 }

DevTools/HackStudio/WidgetTreeModel.cpp

@@ -93,7 +93,7 @@ GUI::Variant WidgetTreeModel::data(const GUI::ModelIndex& index, GUI::ModelRole
         return m_widget_icon;
     }
     if (role == GUI::ModelRole::Display) {
-        return String::format("%s (%s)", widget->class_name(), widget->relative_rect().to_string().characters());
+        return String::formatted("{} ({})", widget->class_name(), widget->relative_rect());
     }
     return {};
 }