[lldb] Gardening in IOHandlerCurses (NFC)

 - Remove _ap (auto_ptr) suffix with _up (unique_ptr) suffix
 - Move forward declaration from IOHandler.h to IOHandlerCursesGUI.h
 - Move curses namespace under lldb_private

Motivated by Alex' comment in llvm#126630.

Author: JDevlieghere

lldb/include/lldb/Core/IOHandler.h

@@ -32,11 +32,6 @@ namespace lldb_private {
 class Debugger;
 } // namespace lldb_private
 
-namespace curses {
-class Application;
-typedef std::unique_ptr<Application> ApplicationAP;
-} // namespace curses
-
 namespace lldb_private {
 
 class IOHandler {

lldb/include/lldb/Core/IOHandlerCursesGUI.h

@@ -12,6 +12,9 @@
 #include "lldb/Core/IOHandler.h"
 
 namespace lldb_private {
+namespace curses {
+class Application;
+} // namespace curses
 
 class IOHandlerCursesGUI : public IOHandler {
 public:
@@ -34,7 +37,7 @@ class IOHandlerCursesGUI : public IOHandler {
   void TerminalSizeChanged() override;
 
 protected:
-  curses::ApplicationAP m_app_ap;
+  std::unique_ptr<curses::Application> m_app_up;
 };
 
 } // namespace lldb_private

lldb/source/Core/IOHandlerCursesGUI.cpp

@@ -94,6 +94,7 @@ using llvm::StringRef;
 #define KEY_SHIFT_TAB (KEY_MAX + 1)
 #define KEY_ALT_ENTER (KEY_MAX + 2)
 
+namespace lldb_private {
 namespace curses {
 class Menu;
 class MenuDelegate;
@@ -4479,8 +4480,9 @@ class Application {
 };
 
 } // namespace curses
+} // namespace lldb_private
 
-using namespace curses;
+using namespace lldb_private::curses;
 
 struct Row {
   ValueObjectUpdater value;
@@ -7573,12 +7575,12 @@ IOHandlerCursesGUI::IOHandlerCursesGUI(Debugger &debugger)
 
 void IOHandlerCursesGUI::Activate() {
   IOHandler::Activate();
-  if (!m_app_ap) {
-    m_app_ap = std::make_unique<Application>(GetInputFILE(), GetOutputFILE());
+  if (!m_app_up) {
+    m_app_up = std::make_unique<Application>(GetInputFILE(), GetOutputFILE());
 
     // This is both a window and a menu delegate
     std::shared_ptr<ApplicationDelegate> app_delegate_sp(
-        new ApplicationDelegate(*m_app_ap, m_debugger));
+        new ApplicationDelegate(*m_app_up, m_debugger));
 
     MenuDelegateSP app_menu_delegate_sp =
         std::static_pointer_cast<MenuDelegate>(app_delegate_sp);
@@ -7652,8 +7654,8 @@ void IOHandlerCursesGUI::Activate() {
     help_menu_sp->AddSubmenu(MenuSP(new Menu(
         "GUI Help", nullptr, 'g', ApplicationDelegate::eMenuID_HelpGUIHelp)));
 
-    m_app_ap->Initialize();
-    WindowSP &main_window_sp = m_app_ap->GetMainWindow();
+    m_app_up->Initialize();
+    WindowSP &main_window_sp = m_app_up->GetMainWindow();
 
     MenuSP menubar_sp(new Menu(Menu::Type::Bar));
     menubar_sp->AddSubmenu(lldb_menu_sp);
@@ -7734,10 +7736,10 @@ void IOHandlerCursesGUI::Activate() {
   }
 }
 
-void IOHandlerCursesGUI::Deactivate() { m_app_ap->Terminate(); }
+void IOHandlerCursesGUI::Deactivate() { m_app_up->Terminate(); }
 
 void IOHandlerCursesGUI::Run() {
-  m_app_ap->Run(m_debugger);
+  m_app_up->Run(m_debugger);
   SetIsDone(true);
 }
 
@@ -7752,7 +7754,7 @@ bool IOHandlerCursesGUI::Interrupt() {
 void IOHandlerCursesGUI::GotEOF() {}
 
 void IOHandlerCursesGUI::TerminalSizeChanged() {
-  m_app_ap->TerminalSizeChanged();
+  m_app_up->TerminalSizeChanged();
 }
 
 #endif // LLDB_ENABLE_CURSES