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third/LuaBridge3/Source/LuaBridge/detail/Overload.h

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+// https://github.com/kunitoki/LuaBridge3
+// Copyright 2020, kunitoki
+// Copyright 2020, Dmitry Tarakanov
+// Copyright 2019, George Tokmaji
+// Copyright 2012, Vinnie Falco <vinnie.falco@gmail.com>
+// SPDX-License-Identifier: MIT
+
+#pragma once
+
+#include "Config.h"
+#include "Errors.h"
+#include "Stack.h"
+#include "TypeTraits.h"
+#include "Userdata.h"
+
+#include <functional>
+#include <tuple>
+
+namespace luabridge {
+
+//=================================================================================================
+/**
+ * @brief Overloaded objects.
+ */
+template <class... Args>
+struct NonConstOverload
+{
+    template <class R, class T>
+    constexpr auto operator()(R (T::*ptr)(Args...)) const noexcept -> decltype(ptr)
+    {
+        return ptr;
+    }
+
+    template <class R, class T>
+    static constexpr auto with(R (T::*ptr)(Args...)) noexcept -> decltype(ptr)
+    {
+        return ptr;
+    }
+};
+
+template <class... Args>
+struct ConstOverload
+{
+    template <class R, class T>
+    constexpr auto operator()(R (T::*ptr)(Args...) const) const noexcept -> decltype(ptr)
+    {
+        return ptr;
+    }
+
+    template <class R, class T>
+    static constexpr auto with(R (T::*ptr)(Args...) const) noexcept -> decltype(ptr)
+    {
+        return ptr;
+    }
+};
+
+template <class... Args>
+struct Overload : ConstOverload<Args...>, NonConstOverload<Args...>
+{
+    using ConstOverload<Args...>::operator();
+    using NonConstOverload<Args...>::operator();
+
+    template <class R>
+    constexpr auto operator()(R (*ptr)(Args...)) const noexcept -> decltype(ptr)
+    {
+        return ptr;
+    }
+
+    template <class R, class T>
+    static constexpr auto with(R (T::*ptr)(Args...)) noexcept -> decltype(ptr)
+    {
+        return ptr;
+    }
+};
+
+//=================================================================================================
+/**
+ * @brief Overload resolution.
+ */
+template <class... Args> [[maybe_unused]] constexpr Overload<Args...> overload = {};
+template <class... Args> [[maybe_unused]] constexpr ConstOverload<Args...> constOverload = {};
+template <class... Args> [[maybe_unused]] constexpr NonConstOverload<Args...> nonConstOverload = {};
+
+} // namespace luabridge