Replace boost::optional with std::optional (#4877)

src/controllers/hotkeys/HotkeyController.cpp

@@ -127,7 +127,7 @@ int HotkeyController::replaceHotkey(QString oldName,
     return this->hotkeys_.append(newHotkey);
 }
 
-boost::optional<HotkeyCategory> HotkeyController::hotkeyCategoryFromName(
+std::optional<HotkeyCategory> HotkeyController::hotkeyCategoryFromName(
     QString categoryName)
 {
     for (const auto &[category, data] : this->categories())

src/controllers/hotkeys/HotkeyController.hpp

@@ -4,7 +4,6 @@
 #include "common/Singleton.hpp"
 #include "controllers/hotkeys/HotkeyCategory.hpp"
 
-#include <boost/optional.hpp>
 #include <pajlada/signals/signal.hpp>
 #include <pajlada/signals/signalholder.hpp>
 
@@ -52,8 +51,7 @@ public:
      * @returns the new index in the SignalVector
      **/
     int replaceHotkey(QString oldName, std::shared_ptr<Hotkey> newHotkey);
-    boost::optional<HotkeyCategory> hotkeyCategoryFromName(
-        QString categoryName);
+    std::optional<HotkeyCategory> hotkeyCategoryFromName(QString categoryName);
 
     /**
      * @brief checks if the hotkey is duplicate

src/controllers/hotkeys/HotkeyHelpers.cpp

@@ -3,9 +3,10 @@
 #include "controllers/hotkeys/ActionNames.hpp"
 #include "controllers/hotkeys/HotkeyCategory.hpp"
 
-#include <boost/optional/optional.hpp>
 #include <QStringList>
 
+#include <optional>
+
 namespace chatterino {
 
 std::vector<QString> parseHotkeyArguments(QString argumentString)
@@ -31,7 +32,7 @@ std::vector<QString> parseHotkeyArguments(QString argumentString)
     return arguments;
 }
 
-boost::optional<ActionDefinition> findHotkeyActionDefinition(
+std::optional<ActionDefinition> findHotkeyActionDefinition(
     HotkeyCategory category, const QString &action)
 {
     auto allActions = actionNames.find(category);

src/controllers/hotkeys/HotkeyHelpers.hpp

@@ -2,15 +2,15 @@
 
 #include "controllers/hotkeys/ActionNames.hpp"
 
-#include <boost/optional/optional.hpp>
 #include <QString>
 
+#include <optional>
 #include <vector>
 
 namespace chatterino {
 
 std::vector<QString> parseHotkeyArguments(QString argumentString);
-boost::optional<ActionDefinition> findHotkeyActionDefinition(
+std::optional<ActionDefinition> findHotkeyActionDefinition(
     HotkeyCategory category, const QString &action);
 
 }  // namespace chatterino