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96 lines
3.2 KiB
C++
96 lines
3.2 KiB
C++
// sol3
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// The MIT License (MIT)
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// Copyright (c) 2013-2018 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_EBCO_HPP
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#define SOL_EBCO_HPP
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#include <type_traits>
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#include <utility>
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namespace sol { namespace detail {
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template <typename T, std::size_t tag = 0, typename = void>
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struct ebco {
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T value_;
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ebco() = default;
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ebco(const ebco&) = default;
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ebco(ebco&&) = default;
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ebco& operator=(const ebco&) = default;
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ebco& operator=(ebco&&) = default;
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ebco(const T& v) : value_(v){};
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ebco(T&& v) : value_(std::move(v)){};
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ebco& operator=(const T& v) {
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value = v;
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}
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ebco& operator=(T&& v) {
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value_ = std::move(v);
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};
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template <typename Arg, typename... Args,
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typename = std::enable_if_t<!std::is_same_v<std::remove_reference_t<std::remove_cv_t<Arg>>,
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ebco> && !std::is_same_v<std::remove_reference_t<std::remove_cv_t<Arg>>, T>>>
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ebco(Arg&& arg, Args&&... args) : T(std::forward<Arg>(arg), std::forward<Args>(args)...){};
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T& value() {
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return value_;
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}
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T const& value() const {
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return value_;
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}
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};
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template <typename T, std::size_t tag>
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struct ebco<T, tag, std::enable_if_t<!std::is_reference_v<T> && std::is_class_v<T> && !std::is_final_v<T>>> : T {
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ebco() = default;
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ebco(const ebco&) = default;
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ebco(ebco&&) = default;
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ebco(const T& v) : T(v){};
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ebco(T&& v) : T(std::move(v)){};
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template <typename Arg, typename... Args,
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typename = std::enable_if_t<!std::is_same_v<std::remove_reference_t<std::remove_cv_t<Arg>>,
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ebco> && !std::is_same_v<std::remove_reference_t<std::remove_cv_t<Arg>>, T>>>
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ebco(Arg&& arg, Args&&... args) : T(std::forward<Arg>(arg), std::forward<Args>(args)...){};
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ebco& operator=(const ebco&) = default;
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ebco& operator=(ebco&&) = default;
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ebco& operator=(const T& v) {
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static_cast<T&>(*this) = v;
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}
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ebco& operator=(T&& v) {
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static_cast<T&>(*this) = std::move(v);
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};
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T& value() {
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return static_cast<T&>(*this);
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}
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T const& value() const {
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return static_cast<T const&>(*this);
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}
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};
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}} // namespace sol::detail
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#endif // SOL_EBCO_HPP
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