settings: Move some simple data to BasicSetting

Reduces the need for the compiler to duplicate this code, by about
100KB executable size.

5 files changed, 129 insertions, 108 deletions

diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
index 3c8368bb2..09e7e673e 100644
--- a/src/common/CMakeLists.txt
+++ b/src/common/CMakeLists.txt
@@ -110,6 +110,7 @@ add_library(common STATIC
     scratch_buffer.h
     settings.cpp
     settings.h
+    settings_common.cpp
     settings_common.h
     settings_enums.h
     settings_input.cpp
@@ -199,6 +200,7 @@ if (MSVC)
 else()
   target_compile_options(common PRIVATE
     $<$<CXX_COMPILER_ID:Clang>:-fsized-deallocation>
+    $<$<CXX_COMPILER_ID:Clang>:-Werror=unreachable-code-aggressive>
   )
 endif()
 
diff --git a/src/common/settings.cpp b/src/common/settings.cpp
index 10cdea844..d98dd2925 100644
--- a/src/common/settings.cpp
+++ b/src/common/settings.cpp
@@ -282,14 +282,6 @@ void UpdateRescalingInfo() {
     info.active = info.up_scale != 1 || info.down_shift != 0;
 }
 
-std::string BasicSetting::ToStringGlobal() const {
-    return {};
-}
-
-bool BasicSetting::UsingGlobal() const {
-    return true;
-}
-
 void RestoreGlobalState(bool is_powered_on) {
     // If a game is running, DO NOT restore the global settings state
     if (is_powered_on) {
diff --git a/src/common/settings_common.cpp b/src/common/settings_common.cpp
new file mode 100644
index 000000000..a7ce99515
--- /dev/null
+++ b/src/common/settings_common.cpp
@@ -0,0 +1,45 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <string>
+#include "common/settings_common.h"
+
+namespace Settings {
+
+BasicSetting::BasicSetting(Linkage& linkage, const std::string& name, enum Category category_,
+                           bool save_, bool runtime_modifiable_)
+    : label{name}, category{category_}, id{linkage.count}, save{save_}, runtime_modifiable{
+                                                                            runtime_modifiable_} {
+    linkage.by_category[category].push_front(this);
+    linkage.count++;
+}
+
+BasicSetting::~BasicSetting() = default;
+
+std::string BasicSetting::ToStringGlobal() const {
+    return this->ToString();
+}
+
+bool BasicSetting::UsingGlobal() const {
+    return true;
+}
+
+void BasicSetting::SetGlobal(bool global) {}
+
+bool BasicSetting::Save() const {
+    return save;
+}
+
+bool BasicSetting::RuntimeModfiable() const {
+    return runtime_modifiable;
+}
+
+Category BasicSetting::Category() const {
+    return category;
+}
+
+const std::string& BasicSetting::GetLabel() const {
+    return label;
+}
+
+} // namespace Settings
diff --git a/src/common/settings_common.h b/src/common/settings_common.h
index 93fddeba6..81d59115d 100644
--- a/src/common/settings_common.h
+++ b/src/common/settings_common.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
 #pragma once
 
 #include <forward_list>
@@ -40,31 +43,7 @@ enum class Category : u32 {
     MaxEnum,
 };
 
-class BasicSetting {
-protected:
-    explicit BasicSetting() = default;
-
-public:
-    virtual ~BasicSetting() = default;
-
-    virtual Category Category() const = 0;
-    virtual constexpr bool Switchable() const = 0;
-    virtual std::string ToString() const = 0;
-    virtual std::string ToStringGlobal() const;
-    virtual void LoadString(const std::string& load) = 0;
-    virtual std::string Canonicalize() const = 0;
-    virtual const std::string& GetLabel() const = 0;
-    virtual std::string DefaultToString() const = 0;
-    virtual bool Save() const = 0;
-    virtual std::type_index TypeId() const = 0;
-    virtual constexpr bool IsEnum() const = 0;
-    virtual bool RuntimeModfiable() const = 0;
-    virtual void SetGlobal(bool global) {}
-    virtual constexpr u32 Id() const = 0;
-    virtual std::string MinVal() const = 0;
-    virtual std::string MaxVal() const = 0;
-    virtual bool UsingGlobal() const;
-};
+class BasicSetting;
 
 class Linkage {
 public:
@@ -75,4 +54,71 @@ public:
     u32 count;
 };
 
+class BasicSetting {
+protected:
+    explicit BasicSetting(Linkage& linkage, const std::string& name, enum Category category_,
+                          bool save_, bool runtime_modifiable_);
+
+public:
+    virtual ~BasicSetting();
+
+    /* Data retrieval */
+
+    [[nodiscard]] virtual std::string ToString() const = 0;
+    [[nodiscard]] virtual std::string ToStringGlobal() const;
+    [[nodiscard]] virtual std::string DefaultToString() const = 0;
+    [[nodiscard]] virtual std::string MinVal() const = 0;
+    [[nodiscard]] virtual std::string MaxVal() const = 0;
+    virtual void LoadString(const std::string& load) = 0;
+    [[nodiscard]] virtual std::string Canonicalize() const = 0;
+
+    /* Identification */
+
+    [[nodiscard]] virtual std::type_index TypeId() const = 0;
+    [[nodiscard]] virtual constexpr bool IsEnum() const = 0;
+    /**
+     * Returns whether the current setting is Switchable.
+     *
+     * @returns If the setting is a SwitchableSetting
+     */
+    [[nodiscard]] virtual constexpr bool Switchable() const {
+        return false;
+    }
+    /**
+     * Returns the save preference of the setting i.e. when saving or reading the setting from a
+     * frontend, whether this setting should be skipped.
+     *
+     * @returns The save preference
+     */
+    [[nodiscard]] bool Save() const;
+    [[nodiscard]] bool RuntimeModfiable() const;
+    [[nodiscard]] constexpr u32 Id() const {
+        return id;
+    }
+    /**
+     * Returns the setting's category AKA INI group.
+     *
+     * @returns The setting's category
+     */
+    [[nodiscard]] Category Category() const;
+    /**
+     * Returns the label this setting was created with.
+     *
+     * @returns A reference to the label
+     */
+    [[nodiscard]] const std::string& GetLabel() const;
+
+    /* Switchable settings */
+
+    virtual void SetGlobal(bool global);
+    [[nodiscard]] virtual bool UsingGlobal() const;
+
+private:
+    const std::string label;      ///< The setting's label
+    const enum Category category; ///< The setting's category AKA INI group
+    const u32 id;
+    const bool save;
+    const bool runtime_modifiable;
+};
+
 } // namespace Settings
diff --git a/src/common/settings_setting.h b/src/common/settings_setting.h
index 99a4bad01..1ca3acf18 100644
--- a/src/common/settings_setting.h
+++ b/src/common/settings_setting.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
 #pragma once
 
 #include <map>
@@ -21,16 +24,6 @@ class Setting : public BasicSetting {
 protected:
     Setting() = default;
 
-    /**
-     * Only sets the setting to the given initializer, leaving the other members to their default
-     * initializers.
-     *
-     * @param global_val Initial value of the setting
-     */
-    explicit Setting(const Type& val)
-        : value{val},
-          default_value{}, maximum{}, minimum{}, label{}, category{Category::Miscellaneous}, id{} {}
-
 public:
     /**
      * Sets a default value, label, and setting value.
@@ -43,11 +36,8 @@ public:
     explicit Setting(Linkage& linkage, const Type& default_val, const std::string& name,
                      enum Category category_, bool save_ = true, bool runtime_modifiable_ = false)
         requires(!ranged)
-        : value{default_val}, default_value{default_val}, label{name}, category{category_},
-          id{linkage.count}, save{save_}, runtime_modifiable{runtime_modifiable_} {
-        linkage.by_category[category].push_front(this);
-        linkage.count++;
-    }
+        : BasicSetting(linkage, name, category_, save_, runtime_modifiable_), value{default_val},
+          default_value{default_val} {}
     virtual ~Setting() = default;
 
     /**
@@ -64,12 +54,8 @@ public:
                      const Type& max_val, const std::string& name, enum Category category_,
                      bool save_ = true, bool runtime_modifiable_ = false)
         requires(ranged)
-        : value{default_val}, default_value{default_val}, maximum{max_val}, minimum{min_val},
-          label{name}, category{category_}, id{linkage.count}, save{save_},
-          runtime_modifiable{runtime_modifiable_} {
-        linkage.by_category[category].push_front(this);
-        linkage.count++;
-    }
+        : BasicSetting(linkage, name, category_, save_, runtime_modifiable_), value{default_val},
+          default_value{default_val}, maximum{max_val}, minimum{min_val} {}
 
     /**
      *  Returns a reference to the setting's value.
@@ -99,41 +85,10 @@ public:
         return default_value;
     }
 
-    /**
-     * Returns the label this setting was created with.
-     *
-     * @returns A reference to the label
-     */
-    [[nodiscard]] const std::string& GetLabel() const override {
-        return label;
-    }
-
-    /**
-     * Returns the setting's category AKA INI group.
-     *
-     * @returns The setting's category
-     */
-    [[nodiscard]] enum Category Category() const override {
-        return category;
-    }
-
-    [[nodiscard]] bool RuntimeModfiable() const override {
-        return runtime_modifiable;
-    }
-
     [[nodiscard]] constexpr bool IsEnum() const override {
         return std::is_enum<Type>::value;
     }
 
-    /**
-     * Returns whether the current setting is Switchable.
-     *
-     * @returns If the setting is a SwitchableSetting
-     */
-    [[nodiscard]] virtual constexpr bool Switchable() const override {
-        return false;
-    }
-
 protected:
     std::string ToString(const Type& value_) const {
         if constexpr (std::is_same<Type, std::string>()) {
@@ -228,16 +183,6 @@ public:
     }
 
     /**
-     * Returns the save preference of the setting i.e. when saving or reading the setting from a
-     * frontend, whether this setting should be skipped.
-     *
-     * @returns The save preference
-     */
-    virtual bool Save() const override {
-        return save;
-    }
-
-    /**
      * Gives us another way to identify the setting without having to go through a string.
      *
      * @returns the type_index of the setting's type
@@ -246,10 +191,6 @@ public:
         return std::type_index(typeid(Type));
     }
 
-    virtual constexpr u32 Id() const override {
-        return id;
-    }
-
     virtual std::string MinVal() const override {
         return this->ToString(minimum);
     }
@@ -258,15 +199,10 @@ public:
     }
 
 protected:
-    Type value{};                 ///< The setting
-    const Type default_value{};   ///< The default value
-    const Type maximum{};         ///< Maximum allowed value of the setting
-    const Type minimum{};         ///< Minimum allowed value of the setting
-    const std::string label{};    ///< The setting's label
-    const enum Category category; ///< The setting's category AKA INI group
-    const u32 id;
-    bool save;
-    bool runtime_modifiable;
+    Type value{};               ///< The setting
+    const Type default_value{}; ///< The default value
+    const Type maximum{};       ///< Maximum allowed value of the setting
+    const Type minimum{};       ///< Minimum allowed value of the setting
 };
 
 /**