Initial commit

Variant.h

@@ -0,0 +1,23 @@
+
+// Helper to make it easier to use std::visit with std::variant
+// For example,
+// std::visit(
+//      overloaded{
+//          [](int i) { std::cout << "int: " << i << std::endl; },
+//          [](double d) { std::cout << "double: " << d << std::endl; },
+//      },
+//      variant
+// );
+
+#ifndef VARIANT_H
+#define VARIANT_H
+
+#include <variant> // NOLINT
+
+template <class... Ts> struct overloaded : Ts... {
+    using Ts::operator()...;
+};
+
+template <class... Ts> overloaded(Ts...) -> overloaded<Ts...>;
+
+#endif // VARIANT_H