global: Use std::optional instead of boost::optional (#1578)

* get rid of boost::optional

* Remove optional references

* Use std::reference_wrapper for optional references

* Fix clang format

* Fix clang format part 2

* Adressed feedback

* Fix clang format and MacOS build

3 files changed, 9 insertions, 7 deletions

diff --git a/src/yuzu/configuration/configure_input.cpp b/src/yuzu/configuration/configure_input.cpp
index 94789c064..42a7beac6 100644
--- a/src/yuzu/configuration/configure_input.cpp
+++ b/src/yuzu/configuration/configure_input.cpp
@@ -322,7 +322,7 @@ void ConfigureInput::setPollingResult(const Common::ParamPackage& params, bool a
     }
 
     updateButtonLabels();
-    input_setter = boost::none;
+    input_setter = {};
 }
 
 void ConfigureInput::keyPressEvent(QKeyEvent* event) {
diff --git a/src/yuzu/configuration/configure_input.h b/src/yuzu/configuration/configure_input.h
index d1198db81..32c7183f9 100644
--- a/src/yuzu/configuration/configure_input.h
+++ b/src/yuzu/configuration/configure_input.h
@@ -7,11 +7,13 @@
 #include <array>
 #include <functional>
 #include <memory>
+#include <optional>
 #include <string>
 #include <unordered_map>
+
 #include <QKeyEvent>
 #include <QWidget>
-#include <boost/optional.hpp>
+
 #include "common/param_package.h"
 #include "core/settings.h"
 #include "input_common/main.h"
@@ -41,7 +43,7 @@ private:
     std::unique_ptr<QTimer> poll_timer;
 
     /// This will be the the setting function when an input is awaiting configuration.
-    boost::optional<std::function<void(const Common::ParamPackage&)>> input_setter;
+    std::optional<std::function<void(const Common::ParamPackage&)>> input_setter;
 
     std::array<Common::ParamPackage, Settings::NativeButton::NumButtons> buttons_param;
     std::array<Common::ParamPackage, Settings::NativeAnalog::NumAnalogs> analogs_param;
diff --git a/src/yuzu/configuration/configure_system.cpp b/src/yuzu/configuration/configure_system.cpp
index 4b34c1e28..bb7ae3da4 100644
--- a/src/yuzu/configuration/configure_system.cpp
+++ b/src/yuzu/configuration/configure_system.cpp
@@ -173,7 +173,7 @@ void ConfigureSystem::UpdateCurrentUser() {
     ui->pm_add->setEnabled(profile_manager->GetUserCount() < Service::Account::MAX_USERS);
 
     const auto& current_user = profile_manager->GetUser(Settings::values.current_user);
-    ASSERT(current_user != std::nullopt);
+    ASSERT(current_user);
     const auto username = GetAccountUsername(*profile_manager, *current_user);
 
     scene->clear();
@@ -261,7 +261,7 @@ void ConfigureSystem::AddUser() {
 void ConfigureSystem::RenameUser() {
     const auto user = tree_view->currentIndex().row();
     const auto uuid = profile_manager->GetUser(user);
-    ASSERT(uuid != std::nullopt);
+    ASSERT(uuid);
 
     Service::Account::ProfileBase profile;
     if (!profile_manager->GetProfileBase(*uuid, profile))
@@ -297,7 +297,7 @@ void ConfigureSystem::RenameUser() {
 void ConfigureSystem::DeleteUser() {
     const auto index = tree_view->currentIndex().row();
     const auto uuid = profile_manager->GetUser(index);
-    ASSERT(uuid != std::nullopt);
+    ASSERT(uuid);
     const auto username = GetAccountUsername(*profile_manager, *uuid);
 
     const auto confirm = QMessageBox::question(
@@ -324,7 +324,7 @@ void ConfigureSystem::DeleteUser() {
 void ConfigureSystem::SetUserImage() {
     const auto index = tree_view->currentIndex().row();
     const auto uuid = profile_manager->GetUser(index);
-    ASSERT(uuid != std::nullopt);
+    ASSERT(uuid);
 
     const auto file = QFileDialog::getOpenFileName(this, tr("Select User Image"), QString(),
                                                    tr("JPEG Images (*.jpg *.jpeg)"));