core: Make variable shadowing a compile-time error

Now that we have most of core free of shadowing, we can enable the
warning as an error to catch anything that may be remaining and also
eliminate this class of logic bug entirely.

4 files changed, 41 insertions, 34 deletions

diff --git a/src/core/hle/service/hid/controllers/controller_base.cpp b/src/core/hle/service/hid/controllers/controller_base.cpp
index 8091db9d7..9d1e6db6a 100644
--- a/src/core/hle/service/hid/controllers/controller_base.cpp
+++ b/src/core/hle/service/hid/controllers/controller_base.cpp
@@ -6,7 +6,7 @@
 
 namespace Service::HID {
 
-ControllerBase::ControllerBase(Core::System& system) : system(system) {}
+ControllerBase::ControllerBase(Core::System& system_) : system(system_) {}
 ControllerBase::~ControllerBase() = default;
 
 void ControllerBase::ActivateController() {
diff --git a/src/core/hle/service/hid/controllers/controller_base.h b/src/core/hle/service/hid/controllers/controller_base.h
index f47a9e61c..1556fb08e 100644
--- a/src/core/hle/service/hid/controllers/controller_base.h
+++ b/src/core/hle/service/hid/controllers/controller_base.h
@@ -18,7 +18,7 @@ class System;
 namespace Service::HID {
 class ControllerBase {
 public:
-    explicit ControllerBase(Core::System& system);
+    explicit ControllerBase(Core::System& system_);
     virtual ~ControllerBase();
 
     // Called when the controller is initialized
diff --git a/src/core/hle/service/hid/controllers/gesture.cpp b/src/core/hle/service/hid/controllers/gesture.cpp
index 9e5df3bb7..d311f754b 100644
--- a/src/core/hle/service/hid/controllers/gesture.cpp
+++ b/src/core/hle/service/hid/controllers/gesture.cpp
@@ -23,7 +23,7 @@ constexpr f32 Square(s32 num) {
     return static_cast<f32>(num * num);
 }
 
-Controller_Gesture::Controller_Gesture(Core::System& system) : ControllerBase(system) {}
+Controller_Gesture::Controller_Gesture(Core::System& system_) : ControllerBase(system_) {}
 Controller_Gesture::~Controller_Gesture() = default;
 
 void Controller_Gesture::OnInit() {
@@ -211,15 +211,16 @@ void Controller_Gesture::UpdateExistingGesture(GestureProperties& gesture, Touch
     }
 }
 
-void Controller_Gesture::EndGesture(GestureProperties& gesture, GestureProperties& last_gesture,
-                                    TouchType& type, Attribute& attributes, f32 time_difference) {
+void Controller_Gesture::EndGesture(GestureProperties& gesture,
+                                    GestureProperties& last_gesture_props, TouchType& type,
+                                    Attribute& attributes, f32 time_difference) {
     const auto& last_entry =
         shared_memory.gesture_states[(shared_memory.header.last_entry_index + 16) % 17];
-    if (last_gesture.active_points != 0) {
+    if (last_gesture_props.active_points != 0) {
         switch (last_entry.type) {
         case TouchType::Touch:
             if (enable_press_and_tap) {
-                SetTapEvent(gesture, last_gesture, type, attributes);
+                SetTapEvent(gesture, last_gesture_props, type, attributes);
                 return;
             }
             type = TouchType::Cancel;
@@ -234,7 +235,7 @@ void Controller_Gesture::EndGesture(GestureProperties& gesture, GesturePropertie
             force_update = true;
             break;
         case TouchType::Pan:
-            EndPanEvent(gesture, last_gesture, type, time_difference);
+            EndPanEvent(gesture, last_gesture_props, type, time_difference);
             break;
         default:
             break;
@@ -246,10 +247,11 @@ void Controller_Gesture::EndGesture(GestureProperties& gesture, GesturePropertie
     }
 }
 
-void Controller_Gesture::SetTapEvent(GestureProperties& gesture, GestureProperties& last_gesture,
-                                     TouchType& type, Attribute& attributes) {
+void Controller_Gesture::SetTapEvent(GestureProperties& gesture,
+                                     GestureProperties& last_gesture_props, TouchType& type,
+                                     Attribute& attributes) {
     type = TouchType::Tap;
-    gesture = last_gesture;
+    gesture = last_gesture_props;
     force_update = true;
     f32 tap_time_difference =
         static_cast<f32>(last_update_timestamp - last_tap_timestamp) / (1000 * 1000 * 1000);
@@ -259,8 +261,9 @@ void Controller_Gesture::SetTapEvent(GestureProperties& gesture, GestureProperti
     }
 }
 
-void Controller_Gesture::UpdatePanEvent(GestureProperties& gesture, GestureProperties& last_gesture,
-                                        TouchType& type, f32 time_difference) {
+void Controller_Gesture::UpdatePanEvent(GestureProperties& gesture,
+                                        GestureProperties& last_gesture_props, TouchType& type,
+                                        f32 time_difference) {
     auto& cur_entry = shared_memory.gesture_states[shared_memory.header.last_entry_index];
     const auto& last_entry =
         shared_memory.gesture_states[(shared_memory.header.last_entry_index + 16) % 17];
@@ -272,13 +275,14 @@ void Controller_Gesture::UpdatePanEvent(GestureProperties& gesture, GesturePrope
     last_pan_time_difference = time_difference;
 
     // Promote to pinch type
-    if (std::abs(gesture.average_distance - last_gesture.average_distance) > pinch_threshold) {
+    if (std::abs(gesture.average_distance - last_gesture_props.average_distance) >
+        pinch_threshold) {
         type = TouchType::Pinch;
-        cur_entry.scale = gesture.average_distance / last_gesture.average_distance;
+        cur_entry.scale = gesture.average_distance / last_gesture_props.average_distance;
     }
 
-    const f32 angle_between_two_lines = std::atan((gesture.angle - last_gesture.angle) /
-                                                  (1 + (gesture.angle * last_gesture.angle)));
+    const f32 angle_between_two_lines = std::atan((gesture.angle - last_gesture_props.angle) /
+                                                  (1 + (gesture.angle * last_gesture_props.angle)));
     // Promote to rotate type
     if (std::abs(angle_between_two_lines) > angle_threshold) {
         type = TouchType::Rotate;
@@ -287,8 +291,9 @@ void Controller_Gesture::UpdatePanEvent(GestureProperties& gesture, GesturePrope
     }
 }
 
-void Controller_Gesture::EndPanEvent(GestureProperties& gesture, GestureProperties& last_gesture,
-                                     TouchType& type, f32 time_difference) {
+void Controller_Gesture::EndPanEvent(GestureProperties& gesture,
+                                     GestureProperties& last_gesture_props, TouchType& type,
+                                     f32 time_difference) {
     auto& cur_entry = shared_memory.gesture_states[shared_memory.header.last_entry_index];
     const auto& last_entry =
         shared_memory.gesture_states[(shared_memory.header.last_entry_index + 16) % 17];
@@ -301,7 +306,7 @@ void Controller_Gesture::EndPanEvent(GestureProperties& gesture, GestureProperti
 
     // Set swipe event with parameters
     if (curr_vel > swipe_threshold) {
-        SetSwipeEvent(gesture, last_gesture, type);
+        SetSwipeEvent(gesture, last_gesture_props, type);
         return;
     }
 
@@ -312,13 +317,13 @@ void Controller_Gesture::EndPanEvent(GestureProperties& gesture, GestureProperti
     force_update = true;
 }
 
-void Controller_Gesture::SetSwipeEvent(GestureProperties& gesture, GestureProperties& last_gesture,
-                                       TouchType& type) {
+void Controller_Gesture::SetSwipeEvent(GestureProperties& gesture,
+                                       GestureProperties& last_gesture_props, TouchType& type) {
     auto& cur_entry = shared_memory.gesture_states[shared_memory.header.last_entry_index];
     const auto& last_entry =
         shared_memory.gesture_states[(shared_memory.header.last_entry_index + 16) % 17];
     type = TouchType::Swipe;
-    gesture = last_gesture;
+    gesture = last_gesture_props;
     force_update = true;
     cur_entry.delta_x = last_entry.delta_x;
     cur_entry.delta_y = last_entry.delta_y;
diff --git a/src/core/hle/service/hid/controllers/gesture.h b/src/core/hle/service/hid/controllers/gesture.h
index 18110a6ad..f46e29411 100644
--- a/src/core/hle/service/hid/controllers/gesture.h
+++ b/src/core/hle/service/hid/controllers/gesture.h
@@ -128,32 +128,34 @@ private:
     void UpdateExistingGesture(GestureProperties& gesture, TouchType& type, f32 time_difference);
 
     // Terminates exiting gesture
-    void EndGesture(GestureProperties& gesture, GestureProperties& last_gesture, TouchType& type,
-                    Attribute& attributes, f32 time_difference);
+    void EndGesture(GestureProperties& gesture, GestureProperties& last_gesture_props,
+                    TouchType& type, Attribute& attributes, f32 time_difference);
 
     // Set current event to a tap event
-    void SetTapEvent(GestureProperties& gesture, GestureProperties& last_gesture, TouchType& type,
-                     Attribute& attributes);
+    void SetTapEvent(GestureProperties& gesture, GestureProperties& last_gesture_props,
+                     TouchType& type, Attribute& attributes);
 
     // Calculates and set the extra parameters related to a pan event
-    void UpdatePanEvent(GestureProperties& gesture, GestureProperties& last_gesture,
+    void UpdatePanEvent(GestureProperties& gesture, GestureProperties& last_gesture_props,
                         TouchType& type, f32 time_difference);
 
     // Terminates the pan event
-    void EndPanEvent(GestureProperties& gesture, GestureProperties& last_gesture, TouchType& type,
-                     f32 time_difference);
+    void EndPanEvent(GestureProperties& gesture, GestureProperties& last_gesture_props,
+                     TouchType& type, f32 time_difference);
 
     // Set current event to a swipe event
-    void SetSwipeEvent(GestureProperties& gesture, GestureProperties& last_gesture,
+    void SetSwipeEvent(GestureProperties& gesture, GestureProperties& last_gesture_props,
                        TouchType& type);
 
-    // Returns an unused finger id, if there is no fingers avaliable MAX_FINGERS will be returned
+    // Returns an unused finger id, if there is no fingers available std::nullopt is returned.
     std::optional<size_t> GetUnusedFingerID() const;
 
-    /** If the touch is new it tries to assing a new finger id, if there is no fingers avaliable no
+    /**
+     * If the touch is new it tries to assign a new finger id, if there is no fingers available no
      * changes will be made. Updates the coordinates if the finger id it's already set. If the touch
      * ends delays the output by one frame to set the end_touch flag before finally freeing the
-     * finger id */
+     * finger id
+     */
     size_t UpdateTouchInputEvent(const std::tuple<float, float, bool>& touch_input,
                                  size_t finger_id);