From 7fe47a9d5b1727a61dc724523b530762f6d6ba19 Mon Sep 17 00:00:00 2001
From: rtk0c <mail.tianyig@gmail.com>
Date: Thu, 30 Jun 2022 21:38:53 -0700
Subject: Restructure project

---
 app/source/Cplt/Utils/Variant.hpp | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 app/source/Cplt/Utils/Variant.hpp

(limited to 'app/source/Cplt/Utils/Variant.hpp')

diff --git a/app/source/Cplt/Utils/Variant.hpp b/app/source/Cplt/Utils/Variant.hpp
new file mode 100644
index 0000000..df2f882
--- /dev/null
+++ b/app/source/Cplt/Utils/Variant.hpp
@@ -0,0 +1,33 @@
+#pragma once
+
+#include <utility>
+#include <variant>
+
+template <class... Ts>
+struct Overloaded : Ts...
+{
+	using Ts::operator()...;
+};
+template <class... Ts>
+Overloaded(Ts...) -> Overloaded<Ts...>;
+
+template <class... Args>
+struct VariantCastProxy
+{
+	std::variant<Args...> v;
+
+	template <class... ToArgs>
+	operator std::variant<ToArgs...>() const
+	{
+		return std::visit(
+			[](auto&& arg) -> std::variant<ToArgs...> { return arg; },
+			v);
+	}
+};
+
+/// Use snake_case naming to align with `static_cast`, `dynamic_cast`, etc..
+template <class... Args>
+auto variant_cast(std::variant<Args...> v) -> VariantCastProxy<Args...>
+{
+	return { std::move(v) };
+}
-- 
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