From 4e5730e1fcef150ce2f13f52a278890589ca96ad Mon Sep 17 00:00:00 2001
From: rtk0c <mail.tianyig@gmail.com>
Date: Fri, 16 Apr 2021 16:49:28 -0700
Subject: More work on workflows - WorkflowStep -> WorkflowNode - Added initial
 kinds of WorkflowNode's

---
 core/src/Utils/Variant.hpp | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 core/src/Utils/Variant.hpp

(limited to 'core/src/Utils/Variant.hpp')

diff --git a/core/src/Utils/Variant.hpp b/core/src/Utils/Variant.hpp
new file mode 100644
index 0000000..7fdb2dc
--- /dev/null
+++ b/core/src/Utils/Variant.hpp
@@ -0,0 +1,27 @@
+#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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