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// sol2
// The MIT License (MIT)
// Copyright (c) 2013-2022 Rapptz, ThePhD and contributors
// 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 NONINFRINGEMENT. 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 SOL_PROPERTY_HPP
#define SOL_PROPERTY_HPP
#include <sol/types.hpp>
#include <sol/ebco.hpp>
#include <type_traits>
#include <utility>
namespace sol {
namespace detail {
struct no_prop { };
} // namespace detail
template <typename R, typename W>
struct property_wrapper : detail::ebco<R, 0>, detail::ebco<W, 1> {
private:
using read_base_t = detail::ebco<R, 0>;
using write_base_t = detail::ebco<W, 1>;
public:
template <typename Rx, typename Wx>
property_wrapper(Rx&& r, Wx&& w) : read_base_t(std::forward<Rx>(r)), write_base_t(std::forward<Wx>(w)) {
}
W& write() {
return write_base_t::value();
}
const W& write() const {
return write_base_t::value();
}
R& read() {
return read_base_t::value();
}
const R& read() const {
return read_base_t::value();
}
};
template <typename F, typename G>
inline decltype(auto) property(F&& f, G&& g) {
typedef lua_bind_traits<meta::unqualified_t<F>> left_traits;
typedef lua_bind_traits<meta::unqualified_t<G>> right_traits;
if constexpr (left_traits::free_arity < right_traits::free_arity) {
return property_wrapper<std::decay_t<F>, std::decay_t<G>>(std::forward<F>(f), std::forward<G>(g));
}
else {
return property_wrapper<std::decay_t<G>, std::decay_t<F>>(std::forward<G>(g), std::forward<F>(f));
}
}
template <typename F>
inline decltype(auto) property(F&& f) {
typedef lua_bind_traits<meta::unqualified_t<F>> left_traits;
if constexpr (left_traits::free_arity < 2) {
return property_wrapper<std::decay_t<F>, detail::no_prop>(std::forward<F>(f), detail::no_prop());
}
else {
return property_wrapper<detail::no_prop, std::decay_t<F>>(detail::no_prop(), std::forward<F>(f));
}
}
template <typename F>
inline decltype(auto) readonly_property(F&& f) {
return property_wrapper<std::decay_t<F>, detail::no_prop>(std::forward<F>(f), detail::no_prop());
}
template <typename F>
inline decltype(auto) writeonly_property(F&& f) {
return property_wrapper<detail::no_prop, std::decay_t<F>>(detail::no_prop(), std::forward<F>(f));
}
template <typename T>
struct readonly_wrapper : detail::ebco<T> {
private:
using base_t = detail::ebco<T>;
public:
using base_t::base_t;
operator T&() {
return base_t::value();
}
operator const T&() const {
return base_t::value();
}
};
// Allow someone to make a member variable readonly (const)
template <typename R, typename T>
inline auto readonly(R T::*v) {
return readonly_wrapper<meta::unqualified_t<decltype(v)>>(v);
}
template <typename T>
struct var_wrapper : detail::ebco<T> {
private:
using base_t = detail::ebco<T>;
public:
using base_t::base_t;
};
template <typename V>
inline auto var(V&& v) {
typedef std::decay_t<V> T;
return var_wrapper<T>(std::forward<V>(v));
}
namespace meta {
template <typename T>
using is_member_object = std::integral_constant<bool, std::is_member_object_pointer_v<T> || is_specialization_of_v<T, readonly_wrapper>>;
template <typename T>
inline constexpr bool is_member_object_v = is_member_object<T>::value;
template <typename T>
using is_member_object_or_function = std::integral_constant<bool, is_member_object_v<T> || std::is_member_pointer_v<T>>;
template <typename T>
inline constexpr bool is_member_object_or_function_v = is_member_object_or_function<T>::value;
} // namespace meta
} // namespace sol
#endif // SOL_PROPERTY_HPP
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