variant.hpp

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#pragma once
 
#include <variant>
 
namespace stax {
 
template <class... Ts>
struct VariantSwitch : Ts... {
  using Ts::operator()...;
};
template <class... Ts>
VariantSwitch(Ts...) -> VariantSwitch<Ts...>;
 
}  // namespace stax
 
template <typename T, class... Types>
inline bool operator==(const T& t, const std::variant<Types...>& v) {
  const T* c = std::get_if<T>(&v);
 
  return c && *c == t;  // true if v contains a T that compares equal to t
}
 
template <typename T, class... Types>
inline bool operator==(const std::variant<Types...>& v, const T& t) {
  return t == v;
}