Method eq

example/matcher.cpp:39–46

 private:
  template <class T, class U, class... TArgs>
  static constexpr auto eq(const T& t, const U& u, const TArgs&... args) {
    using namespace boost::ut;
    if constexpr (sizeof...(args) > 0) {
      return (that % detail::value{u} == t) or eq(t, args...);
    } else {
      return (that % detail::value{u} == t);
    }
  }

  std::tuple<Ts...> ts_;
};