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106 lines
4.0 KiB
C++
106 lines
4.0 KiB
C++
// The MIT License (MIT)
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// Copyright (c) 2013-2016 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_PROPERTY_HPP
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#define SOL_PROPERTY_HPP
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namespace sol {
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struct no_prop { };
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template <typename R, typename W>
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struct property_wrapper {
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typedef std::integral_constant<bool, !std::is_void<R>::value> can_read;
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typedef std::integral_constant<bool, !std::is_void<W>::value> can_write;
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typedef std::conditional_t<can_read::value, R, no_prop> Read;
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typedef std::conditional_t<can_write::value, W, no_prop> Write;
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Read read;
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Write write;
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template <typename Rx, typename Wx>
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property_wrapper(Rx&& r, Wx&& w) : read(std::forward<Rx>(r)), write(std::forward<Wx>(w)) {}
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};
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namespace property_detail {
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template <typename R, typename W>
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inline decltype(auto) property(std::true_type, R&& read, W&& write) {
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return property_wrapper<std::decay_t<R>, std::decay_t<W>>(std::forward<R>(read), std::forward<W>(write));
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}
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template <typename W, typename R>
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inline decltype(auto) property(std::false_type, W&& write, R&& read) {
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return property_wrapper<std::decay_t<R>, std::decay_t<W>>(std::forward<R>(read), std::forward<W>(write));
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}
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template <typename R>
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inline decltype(auto) property(std::true_type, R&& read) {
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return property_wrapper<std::decay_t<R>, void>(std::forward<R>(read), no_prop());
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}
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template <typename W>
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inline decltype(auto) property(std::false_type, W&& write) {
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return property_wrapper<void, std::decay_t<W>>(no_prop(), std::forward<W>(write));
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}
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} // property_detail
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template <typename F, typename G>
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inline decltype(auto) property(F&& f, G&& g) {
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typedef lua_bind_traits<meta::unqualified_t<F>> left_traits;
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typedef lua_bind_traits<meta::unqualified_t<G>> right_traits;
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return property_detail::property(meta::boolean<(left_traits::free_arity < right_traits::free_arity)>(), std::forward<F>(f), std::forward<G>(g));
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}
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template <typename F>
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inline decltype(auto) property(F&& f) {
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typedef lua_bind_traits<meta::unqualified_t<F>> left_traits;
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return property_detail::property(meta::boolean<(left_traits::free_arity < 2)>(), std::forward<F>(f));
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}
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template <typename F>
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inline decltype(auto) readonly_property(F&& f) {
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return property_detail::property(std::true_type(), std::forward<F>(f));
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}
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// Allow someone to make a member variable readonly (const)
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template <typename R, typename T>
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inline auto readonly(R T::* v) {
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typedef const R C;
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return static_cast<C T::*>(v);
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}
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template <typename T>
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struct var_wrapper {
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T value;
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template <typename... Args>
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var_wrapper(Args&&... args) : value(std::forward<Args>(args)...) {}
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var_wrapper(const var_wrapper&) = default;
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var_wrapper(var_wrapper&&) = default;
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var_wrapper& operator=(const var_wrapper&) = default;
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var_wrapper& operator=(var_wrapper&&) = default;
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};
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template <typename V>
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inline auto var(V&& v) {
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typedef meta::unqualified_t<V> T;
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return var_wrapper<T>(std::forward<V>(v));
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}
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} // sol
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#endif // SOL_PROPERTY_HPP
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