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#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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