// The MIT License (MIT)

//

// Copyright (c) 11/27/18 nick. <nbatkins@gmail.com>

//

// Permission is hereby granted, free of charge, to any person obtaining a copy

// of this software and associated documentation files (the "Software"), to deal

// in the Software without restriction, including without limitation the rights

// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

// copies of the Software, and to permit persons to whom the Software is

// furnished to do so, subject to the following conditions:

//

// The above copyright notice and this permission notice shall be included in

// all copies or substantial portions of the Software.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

// FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE

// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

// SOFTWARE.#ifndef CPP_REDIS_OPTIONAL_HPP

#ifndef CPP_REDIS_OPTIONAL_HPP

#define CPP_REDIS_OPTIONAL_HPP

#include <string>

// Prefer std optional

#if __cplusplus >= 201703L

#include <optional>

namespace cpp_redis {

template <class T> using optional_t = std::optional<T>;

template <int I, class T> using enableIf = typename std::enable_if<I, T>::type;

#else

#include <cpp_redis/misc/logger.hpp>

namespace cpp_redis {

template <int I, class T> using enableIf = typename std::enable_if<I, T>::type;

template <class T> struct optional {

optional(T value) : m_value(value) {}

// optional<T>&

// operator()(T value) {

// m_value = value;

// return *this;

// }

T m_value;

template <class U>

enableIf<std::is_convertible<U, T>::value, T> value_or(U &&v) const {

__CPP_REDIS_LOG(1, "value_or(U&& v)\n")

return std::forward<U>(v);

}

template <class F> auto value_or(F &&action) const -> decltype(action()) {

return action();

}

};

template <class T> using optional_t = optional<T>;

#endif

} // namespace cpp_redis

#endif // CPP_REDIS_OPTIONAL_HPP