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103 lines
3.0 KiB
C++
103 lines
3.0 KiB
C++
// sol2
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// The MIT License (MIT)
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// Copyright (c) 2013-2021 Rapptz, ThePhD and contributors
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#ifndef SOL_POINTER_LIKE_HPP
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#define SOL_POINTER_LIKE_HPP
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#include <sol/base_traits.hpp>
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#include <utility>
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#include <type_traits>
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namespace sol {
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namespace meta {
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namespace meta_detail {
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template <typename T>
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using is_dereferenceable_test = decltype(*std::declval<T>());
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template <typename T>
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using is_explicitly_dereferenceable_test = decltype(std::declval<T>().operator*());
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} // namespace meta_detail
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template <typename T>
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using is_pointer_like = std::integral_constant<bool,
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!std::is_array_v<T> && (std::is_pointer_v<T> || is_detected_v<meta_detail::is_explicitly_dereferenceable_test, T>)>;
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template <typename T>
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constexpr inline bool is_pointer_like_v = is_pointer_like<T>::value;
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} // namespace meta
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namespace detail {
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template <typename T>
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auto unwrap(T&& item) -> decltype(std::forward<T>(item)) {
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return std::forward<T>(item);
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}
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template <typename T>
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T& unwrap(std::reference_wrapper<T> arg) {
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return arg.get();
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}
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template <typename T>
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inline decltype(auto) deref(T&& item) {
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using Tu = meta::unqualified_t<T>;
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if constexpr (meta::is_pointer_like_v<Tu>) {
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return *std::forward<T>(item);
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}
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else {
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return std::forward<T>(item);
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}
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}
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template <typename T>
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inline decltype(auto) deref_move_only(T&& item) {
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using Tu = meta::unqualified_t<T>;
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if constexpr (meta::is_pointer_like_v<Tu> && !std::is_pointer_v<Tu> && !std::is_copy_constructible_v<Tu>) {
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return *std::forward<T>(item);
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}
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else {
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return std::forward<T>(item);
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}
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}
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template <typename T>
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inline T* ptr(T& val) {
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return std::addressof(val);
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}
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template <typename T>
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inline T* ptr(std::reference_wrapper<T> val) {
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return std::addressof(val.get());
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}
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template <typename T>
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inline T* ptr(T* val) {
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return val;
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}
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} // namespace detail
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} // namespace sol
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#endif // SOL_POINTER_LIKE_HPP
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