14 files changed, 57 insertions, 41 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 71853eaad..cfd80886c 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -76,6 +76,7 @@ if (MSVC)
         /we4549 # 'operator1': operator before comma has no effect; did you intend 'operator2'?
         /we4555 # Expression has no effect; expected expression with side-effect
         /we4715 # 'function': not all control paths return a value
+        /we4826 # Conversion from 'type1' to 'type2' is sign-extended. This may cause unexpected runtime behavior.
         /we4834 # Discarding return value of function with 'nodiscard' attribute
         /we5038 # data member 'member1' will be initialized after data member 'member2'
         /we5245 # 'function': unreferenced function with internal linkage has been removed
diff --git a/src/audio_core/CMakeLists.txt b/src/audio_core/CMakeLists.txt
index 01b4ffd88..0a1f3bf18 100644
--- a/src/audio_core/CMakeLists.txt
+++ b/src/audio_core/CMakeLists.txt
@@ -206,6 +206,7 @@ if (MSVC)
         /we4244 # 'conversion': conversion from 'type1' to 'type2', possible loss of data
         /we4245 # 'conversion': conversion from 'type1' to 'type2', signed/unsigned mismatch
         /we4254 # 'operator': conversion from 'type1:field_bits' to 'type2:field_bits', possible loss of data
+        /we4800 # Implicit conversion from 'type' to bool. Possible information loss
     )
 else()
     target_compile_options(audio_core PRIVATE
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
index 6da547a3f..043f27fb1 100644
--- a/src/common/CMakeLists.txt
+++ b/src/common/CMakeLists.txt
@@ -157,6 +157,12 @@ if (MSVC)
   target_compile_options(common PRIVATE
     /W4
     /WX
+
+    /we4242 # 'identifier': conversion from 'type1' to 'type2', possible loss of data
+    /we4244 # 'conversion': conversion from 'type1' to 'type2', possible loss of data
+    /we4245 # 'conversion': conversion from 'type1' to 'type2', signed/unsigned mismatch
+    /we4254 # 'operator': conversion from 'type1:field_bits' to 'type2:field_bits', possible loss of data
+    /we4800 # Implicit conversion from 'type' to bool. Possible information loss
   )
 else()
   target_compile_options(common PRIVATE
diff --git a/src/common/bit_field.h b/src/common/bit_field.h
index 7e1df62b1..e4e58ea45 100644
--- a/src/common/bit_field.h
+++ b/src/common/bit_field.h
@@ -141,10 +141,6 @@ public:
     constexpr BitField(BitField&&) noexcept = default;
     constexpr BitField& operator=(BitField&&) noexcept = default;
 
-    [[nodiscard]] constexpr operator T() const {
-        return Value();
-    }
-
     constexpr void Assign(const T& value) {
 #ifdef _MSC_VER
         storage = static_cast<StorageType>((storage & ~mask) | FormatValue(value));
@@ -162,6 +158,17 @@ public:
         return ExtractValue(storage);
     }
 
+    template <typename ConvertedToType>
+    [[nodiscard]] constexpr ConvertedToType As() const {
+        static_assert(!std::is_same_v<T, ConvertedToType>,
+                      "Unnecessary cast. Use Value() instead.");
+        return static_cast<ConvertedToType>(Value());
+    }
+
+    [[nodiscard]] constexpr operator T() const {
+        return Value();
+    }
+
     [[nodiscard]] constexpr explicit operator bool() const {
         return Value() != 0;
     }
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 72da9cb56..113e663b5 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -774,6 +774,7 @@ if (MSVC)
         /we4244 # 'conversion': conversion from 'type1' to 'type2', possible loss of data
         /we4245 # 'conversion': conversion from 'type1' to 'type2', signed/unsigned mismatch
         /we4254 # 'operator': conversion from 'type1:field_bits' to 'type2:field_bits', possible loss of data
+        /we4800 # Implicit conversion from 'type' to bool. Possible information loss
     )
 else()
     target_compile_options(core PRIVATE
diff --git a/src/core/file_sys/program_metadata.cpp b/src/core/file_sys/program_metadata.cpp
index 08d489eab..f00479bd3 100644
--- a/src/core/file_sys/program_metadata.cpp
+++ b/src/core/file_sys/program_metadata.cpp
@@ -127,7 +127,7 @@ void ProgramMetadata::LoadManual(bool is_64_bit, ProgramAddressSpaceType address
 }
 
 bool ProgramMetadata::Is64BitProgram() const {
-    return npdm_header.has_64_bit_instructions;
+    return npdm_header.has_64_bit_instructions.As<bool>();
 }
 
 ProgramAddressSpaceType ProgramMetadata::GetAddressSpaceType() const {
diff --git a/src/core/hid/emulated_controller.cpp b/src/core/hid/emulated_controller.cpp
index 025f1c78e..57eff72fe 100644
--- a/src/core/hid/emulated_controller.cpp
+++ b/src/core/hid/emulated_controller.cpp
@@ -1158,27 +1158,27 @@ bool EmulatedController::IsControllerSupported(bool use_temporary_value) const {
     const auto type = is_configuring && use_temporary_value ? tmp_npad_type : npad_type;
     switch (type) {
     case NpadStyleIndex::ProController:
-        return supported_style_tag.fullkey;
+        return supported_style_tag.fullkey.As<bool>();
     case NpadStyleIndex::Handheld:
-        return supported_style_tag.handheld;
+        return supported_style_tag.handheld.As<bool>();
     case NpadStyleIndex::JoyconDual:
-        return supported_style_tag.joycon_dual;
+        return supported_style_tag.joycon_dual.As<bool>();
     case NpadStyleIndex::JoyconLeft:
-        return supported_style_tag.joycon_left;
+        return supported_style_tag.joycon_left.As<bool>();
     case NpadStyleIndex::JoyconRight:
-        return supported_style_tag.joycon_right;
+        return supported_style_tag.joycon_right.As<bool>();
     case NpadStyleIndex::GameCube:
-        return supported_style_tag.gamecube;
+        return supported_style_tag.gamecube.As<bool>();
     case NpadStyleIndex::Pokeball:
-        return supported_style_tag.palma;
+        return supported_style_tag.palma.As<bool>();
     case NpadStyleIndex::NES:
-        return supported_style_tag.lark;
+        return supported_style_tag.lark.As<bool>();
     case NpadStyleIndex::SNES:
-        return supported_style_tag.lucia;
+        return supported_style_tag.lucia.As<bool>();
     case NpadStyleIndex::N64:
-        return supported_style_tag.lagoon;
+        return supported_style_tag.lagoon.As<bool>();
     case NpadStyleIndex::SegaGenesis:
-        return supported_style_tag.lager;
+        return supported_style_tag.lager.As<bool>();
     default:
         return false;
     }
diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp
index b07ae3f02..4aca5b27d 100644
--- a/src/core/hle/kernel/svc.cpp
+++ b/src/core/hle/kernel/svc.cpp
@@ -751,8 +751,8 @@ static void Break(Core::System& system, u32 reason, u64 info1, u64 info2) {
     }
 
     system.GetReporter().SaveSvcBreakReport(
-        static_cast<u32>(break_reason.break_type.Value()), break_reason.signal_debugger, info1,
-        info2, has_dumped_buffer ? std::make_optional(debug_buffer) : std::nullopt);
+        static_cast<u32>(break_reason.break_type.Value()), break_reason.signal_debugger.As<bool>(),
+        info1, info2, has_dumped_buffer ? std::make_optional(debug_buffer) : std::nullopt);
 
     if (!break_reason.signal_debugger) {
         LOG_CRITICAL(
diff --git a/src/core/hle/service/am/applets/applets.h b/src/core/hle/service/am/applets/applets.h
index e78a57657..12c6a5b1a 100644
--- a/src/core/hle/service/am/applets/applets.h
+++ b/src/core/hle/service/am/applets/applets.h
@@ -164,7 +164,7 @@ protected:
         u32_le size;
         u32_le library_version;
         u32_le theme_color;
-        u8 play_startup_sound;
+        bool play_startup_sound;
         u64_le system_tick;
     };
     static_assert(sizeof(CommonArguments) == 0x20, "CommonArguments has incorrect size.");
diff --git a/src/core/hle/service/hid/controllers/npad.cpp b/src/core/hle/service/hid/controllers/npad.cpp
index ba8a1f786..3b26e96de 100644
--- a/src/core/hle/service/hid/controllers/npad.cpp
+++ b/src/core/hle/service/hid/controllers/npad.cpp
@@ -1502,25 +1502,25 @@ bool Controller_NPad::IsControllerSupported(Core::HID::NpadStyleIndex controller
         Core::HID::NpadStyleTag style = GetSupportedStyleSet();
         switch (controller) {
         case Core::HID::NpadStyleIndex::ProController:
-            return style.fullkey;
+            return style.fullkey.As<bool>();
         case Core::HID::NpadStyleIndex::JoyconDual:
-            return style.joycon_dual;
+            return style.joycon_dual.As<bool>();
         case Core::HID::NpadStyleIndex::JoyconLeft:
-            return style.joycon_left;
+            return style.joycon_left.As<bool>();
         case Core::HID::NpadStyleIndex::JoyconRight:
-            return style.joycon_right;
+            return style.joycon_right.As<bool>();
         case Core::HID::NpadStyleIndex::GameCube:
-            return style.gamecube;
+            return style.gamecube.As<bool>();
         case Core::HID::NpadStyleIndex::Pokeball:
-            return style.palma;
+            return style.palma.As<bool>();
         case Core::HID::NpadStyleIndex::NES:
-            return style.lark;
+            return style.lark.As<bool>();
         case Core::HID::NpadStyleIndex::SNES:
-            return style.lucia;
+            return style.lucia.As<bool>();
         case Core::HID::NpadStyleIndex::N64:
-            return style.lagoon;
+            return style.lagoon.As<bool>();
         case Core::HID::NpadStyleIndex::SegaGenesis:
-            return style.lager;
+            return style.lager.As<bool>();
         default:
             return false;
         }
diff --git a/src/input_common/CMakeLists.txt b/src/input_common/CMakeLists.txt
index 7935ac655..d2730bdc1 100644
--- a/src/input_common/CMakeLists.txt
+++ b/src/input_common/CMakeLists.txt
@@ -45,6 +45,7 @@ if (MSVC)
         /we4244 # 'conversion': conversion from 'type1' to 'type2', possible loss of data
         /we4245 # 'conversion': conversion from 'type1' to 'type2', signed/unsigned mismatch
         /we4254 # 'operator': conversion from 'type1:field_bits' to 'type2:field_bits', possible loss of data
+        /we4800 # Implicit conversion from 'type' to bool. Possible information loss
     )
 else()
     target_compile_options(input_common PRIVATE
diff --git a/src/input_common/drivers/sdl_driver.cpp b/src/input_common/drivers/sdl_driver.cpp
index b72e4b397..c175a8853 100644
--- a/src/input_common/drivers/sdl_driver.cpp
+++ b/src/input_common/drivers/sdl_driver.cpp
@@ -40,8 +40,8 @@ public:
     void EnableMotion() {
         if (sdl_controller) {
             SDL_GameController* controller = sdl_controller.get();
-            has_accel = SDL_GameControllerHasSensor(controller, SDL_SENSOR_ACCEL);
-            has_gyro = SDL_GameControllerHasSensor(controller, SDL_SENSOR_GYRO);
+            has_accel = SDL_GameControllerHasSensor(controller, SDL_SENSOR_ACCEL) == SDL_TRUE;
+            has_gyro = SDL_GameControllerHasSensor(controller, SDL_SENSOR_GYRO) == SDL_TRUE;
             if (has_accel) {
                 SDL_GameControllerSetSensorEnabled(controller, SDL_SENSOR_ACCEL, SDL_TRUE);
             }
diff --git a/src/input_common/input_poller.cpp b/src/input_common/input_poller.cpp
index ca33fb4eb..ccc3076ca 100644
--- a/src/input_common/input_poller.cpp
+++ b/src/input_common/input_poller.cpp
@@ -797,8 +797,8 @@ std::unique_ptr<Common::Input::InputDevice> InputFactory::CreateButtonDevice(
 
     const auto button_id = params.Get("button", 0);
     const auto keyboard_key = params.Get("code", 0);
-    const auto toggle = params.Get("toggle", false);
-    const auto inverted = params.Get("inverted", false);
+    const auto toggle = params.Get("toggle", false) != 0;
+    const auto inverted = params.Get("inverted", false) != 0;
     input_engine->PreSetController(identifier);
     input_engine->PreSetButton(identifier, button_id);
     input_engine->PreSetButton(identifier, keyboard_key);
@@ -820,8 +820,8 @@ std::unique_ptr<Common::Input::InputDevice> InputFactory::CreateHatButtonDevice(
 
     const auto button_id = params.Get("hat", 0);
     const auto direction = input_engine->GetHatButtonId(params.Get("direction", ""));
-    const auto toggle = params.Get("toggle", false);
-    const auto inverted = params.Get("inverted", false);
+    const auto toggle = params.Get("toggle", false) != 0;
+    const auto inverted = params.Get("inverted", false) != 0;
 
     input_engine->PreSetController(identifier);
     input_engine->PreSetHatButton(identifier, button_id);
@@ -879,7 +879,7 @@ std::unique_ptr<Common::Input::InputDevice> InputFactory::CreateAnalogDevice(
         .threshold = std::clamp(params.Get("threshold", 0.5f), 0.0f, 1.0f),
         .offset = std::clamp(params.Get("offset", 0.0f), -1.0f, 1.0f),
         .inverted = params.Get("invert", "+") == "-",
-        .toggle = static_cast<bool>(params.Get("toggle", false)),
+        .toggle = params.Get("toggle", false) != 0,
     };
     input_engine->PreSetController(identifier);
     input_engine->PreSetAxis(identifier, axis);
@@ -895,8 +895,8 @@ std::unique_ptr<Common::Input::InputDevice> InputFactory::CreateTriggerDevice(
     };
 
     const auto button = params.Get("button", 0);
-    const auto toggle = params.Get("toggle", false);
-    const auto inverted = params.Get("inverted", false);
+    const auto toggle = params.Get("toggle", false) != 0;
+    const auto inverted = params.Get("inverted", false) != 0;
 
     const auto axis = params.Get("axis", 0);
     const Common::Input::AnalogProperties properties = {
@@ -926,8 +926,8 @@ std::unique_ptr<Common::Input::InputDevice> InputFactory::CreateTouchDevice(
     };
 
     const auto button = params.Get("button", 0);
-    const auto toggle = params.Get("toggle", false);
-    const auto inverted = params.Get("inverted", false);
+    const auto toggle = params.Get("toggle", false) != 0;
+    const auto inverted = params.Get("inverted", false) != 0;
 
     const auto axis_x = params.Get("axis_x", 0);
     const Common::Input::AnalogProperties properties_x = {
diff --git a/src/shader_recompiler/CMakeLists.txt b/src/shader_recompiler/CMakeLists.txt
index cbc1daf77..967da0791 100644
--- a/src/shader_recompiler/CMakeLists.txt
+++ b/src/shader_recompiler/CMakeLists.txt
@@ -248,7 +248,6 @@ if (MSVC)
         /we4245 # 'conversion' : conversion from 'type1' to 'type2', signed/unsigned mismatch
         /we4254 # 'operator': conversion from 'type1:field_bits' to 'type2:field_bits', possible loss of data
         /we4800 # Implicit conversion from 'type' to bool. Possible information loss
-        /we4826 # Conversion from 'type1' to 'type2' is sign-extended. This may cause unexpected runtime behavior.
     )
 else()
     target_compile_options(shader_recompiler PRIVATE