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102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
// The MIT License (MIT)
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// Copyright (c) 2013-2017 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_TIE_HPP
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#define SOL_TIE_HPP
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#include "traits.hpp"
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namespace sol {
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namespace detail {
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template <typename T>
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struct is_speshul : std::false_type {};
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}
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template <typename T>
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struct tie_size : std::tuple_size<T> {};
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template <typename T>
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struct is_tieable : std::integral_constant<bool, (::sol::tie_size<T>::value > 0)> {};
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template <typename... Tn>
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struct tie_t : public std::tuple<std::add_lvalue_reference_t<Tn>...> {
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private:
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typedef std::tuple<std::add_lvalue_reference_t<Tn>...> base_t;
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template <typename T>
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void set(std::false_type, T&& target) {
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std::get<0>(*this) = std::forward<T>(target);
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}
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template <typename T>
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void set(std::true_type, T&& target) {
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typedef tie_size<meta::unqualified_t<T>> value_size;
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typedef tie_size<std::tuple<Tn...>> tie_size;
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typedef std::conditional_t<(value_size::value < tie_size::value), value_size, tie_size> indices_size;
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typedef std::make_index_sequence<indices_size::value> indices;
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set_extra(detail::is_speshul<meta::unqualified_t<T>>(), indices(), std::forward<T>(target));
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}
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template <std::size_t... I, typename T>
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void set_extra(std::true_type, std::index_sequence<I...>, T&& target) {
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using std::get;
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(void)detail::swallow{ 0,
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(get<I>(static_cast<base_t&>(*this)) = get<I>(types<Tn...>(), target), 0)...
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, 0 };
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}
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template <std::size_t... I, typename T>
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void set_extra(std::false_type, std::index_sequence<I...>, T&& target) {
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using std::get;
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(void)detail::swallow{ 0,
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(get<I>(static_cast<base_t&>(*this)) = get<I>(target), 0)...
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, 0 };
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}
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public:
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using base_t::base_t;
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template <typename T>
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tie_t& operator= (T&& value) {
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typedef is_tieable<meta::unqualified_t<T>> tieable;
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set(tieable(), std::forward<T>(value));
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return *this;
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}
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};
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template <typename... Tn>
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struct tie_size< tie_t<Tn...> > : std::tuple_size< std::tuple<Tn...> > { };
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namespace adl_barrier_detail {
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template <typename... Tn>
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inline tie_t<std::remove_reference_t<Tn>...> tie(Tn&&... argn) {
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return tie_t<std::remove_reference_t<Tn>...>(std::forward<Tn>(argn)...);
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}
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}
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using namespace adl_barrier_detail;
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} // sol
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#endif // SOL_TIE_HPP
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