#include <condition_variable>
#include <cstdint>
#include "internal/lambds_traits.hpp"
#include <type_traits>
#include <vector>
#include <thread>
#include <mutex>
#include <condition_variable>>

namespace hqueue {
  template<typename T>
    concept executor_t = requires(T a) {
      std::is_invocable_v<T>;
    };

  template<executor_t executor, typename cache_entry_t>
  class queue {
  public:
    using return_type = typename function_traits<executor_t>::return_type;
    using arguments = typename function_traits<executor_t>::argument_types;

    template<typename R, typename Args>
    struct Task {
      Args args;
      //use std expected
    };

    queue(executor exec) : m_executor(exec) { }
  private:
    std::mutex m_mtx;
    std::condition_variable m_cv;
    executor m_executor;
  };
}