mirror of
https://github.com/ThePhD/sol2.git
synced 2024-03-22 13:10:44 +08:00
102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
// sol3
|
|
|
|
// The MIT License (MIT)
|
|
|
|
// Copyright (c) 2013-2019 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_POINTER_LIKE_HPP
|
|
#define SOL_POINTER_LIKE_HPP
|
|
|
|
#include <sol/base_traits.hpp>
|
|
|
|
#include <utility>
|
|
#include <type_traits>
|
|
|
|
namespace sol {
|
|
|
|
namespace meta {
|
|
namespace meta_detail {
|
|
template <typename T>
|
|
using is_dereferenceable_test = decltype(*std::declval<T>());
|
|
|
|
template <typename T>
|
|
using is_explicitly_dereferenceable_test = decltype(std::declval<T>().operator*());
|
|
}
|
|
|
|
template <typename T>
|
|
using is_pointer_like = std::integral_constant<bool, !std::is_array_v<T> && (std::is_pointer_v<T> || is_detected_v<meta_detail::is_explicitly_dereferenceable_test, T>)>;
|
|
|
|
template <typename T>
|
|
constexpr inline bool is_pointer_like_v = is_pointer_like<T>::value;
|
|
} // namespace meta
|
|
|
|
namespace detail {
|
|
|
|
template <typename T>
|
|
auto unwrap(T&& item) -> decltype(std::forward<T>(item)) {
|
|
return std::forward<T>(item);
|
|
}
|
|
|
|
template <typename T>
|
|
T& unwrap(std::reference_wrapper<T> arg) {
|
|
return arg.get();
|
|
}
|
|
|
|
template <typename T>
|
|
inline decltype(auto) deref(T&& item) {
|
|
using Tu = meta::unqualified_t<T>;
|
|
if constexpr (meta::is_pointer_like_v<Tu>) {
|
|
return *std::forward<T>(item);
|
|
}
|
|
else {
|
|
return std::forward<T>(item);
|
|
}
|
|
}
|
|
|
|
template <typename T>
|
|
inline decltype(auto) deref_move_only(T&& item) {
|
|
using Tu = meta::unqualified_t<T>;
|
|
if constexpr (meta::is_pointer_like_v<Tu> && !std::is_pointer_v<Tu> && !std::is_copy_constructible_v<Tu>) {
|
|
return *std::forward<T>(item);
|
|
}
|
|
else {
|
|
return std::forward<T>(item);
|
|
}
|
|
}
|
|
|
|
template <typename T>
|
|
inline T* ptr(T& val) {
|
|
return std::addressof(val);
|
|
}
|
|
|
|
template <typename T>
|
|
inline T* ptr(std::reference_wrapper<T> val) {
|
|
return std::addressof(val.get());
|
|
}
|
|
|
|
template <typename T>
|
|
inline T* ptr(T* val) {
|
|
return val;
|
|
}
|
|
} // namespace detail
|
|
} // namespace sol
|
|
|
|
#endif // SOL_POINTER_LIKE_HPP
|