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✨ reference_wrapper isn't constexpr, more polyfill
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| // ============================================================================= | ||
| // | ||
| // ztd.text | ||
| // Copyright © 2021 JeanHeyd "ThePhD" Meneide and Shepherd's Oasis, LLC | ||
| // Contact: opensource@soasis.org | ||
| // | ||
| // Commercial License Usage | ||
| // Licensees holding valid commercial ztd.text licenses may use this file in | ||
| // accordance with the commercial license agreement provided with the | ||
| // Software or, alternatively, in accordance with the terms contained in | ||
| // a written agreement between you and Shepherd's Oasis, LLC. | ||
| // For licensing terms and conditions see your agreement. For | ||
| // further information contact opensource@soasis.org. | ||
| // | ||
| // Apache License Version 2 Usage | ||
| // Alternatively, this file may be used under the terms of Apache License | ||
| // Version 2.0 (the "License") for non-commercial use; you may not use this | ||
| // file except in compliance with the License. You may obtain a copy of the | ||
| // License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| // | ||
| // ============================================================================> | ||
|
|
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| #pragma once | ||
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| #ifndef ZTD_TEXT_DETAIL_REFERENCE_WRAPPER_HPP | ||
| #define ZTD_TEXT_DETAIL_REFERENCE_WRAPPER_HPP | ||
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| #include <ztd/text/version.hpp> | ||
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| #include <functional> | ||
| #include <utility> | ||
| #include <type_traits> | ||
| #include <memory> | ||
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| #include <ztd/text/detail/prologue.hpp> | ||
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| namespace ztd { namespace text { | ||
| ZTD_TEXT_INLINE_ABI_NAMESPACE_OPEN_I_ | ||
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| namespace __txt_detail { | ||
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| template <typename _Ty> | ||
| class __reference_wrapper { | ||
| private: | ||
| using _Ref = ::std::add_lvalue_reference_t<_Ty>; | ||
| using _Ptr = ::std::add_pointer_t<_Ty>; | ||
| _Ptr __ptr; | ||
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| public: | ||
| constexpr __reference_wrapper(_Ref __ref) noexcept : __ptr(::std::addressof(__ref)) { | ||
| } | ||
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| constexpr operator _Ref() const noexcept { | ||
| return *__ptr; | ||
| } | ||
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| constexpr _Ref get() const noexcept { | ||
| return *__ptr; | ||
| } | ||
| }; | ||
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| template <typename _Ty> | ||
| __reference_wrapper(_Ty&) -> __reference_wrapper<_Ty>; | ||
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| } // namespace __txt_detail | ||
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| ////// | ||
| /// @brief A subsitute for C++20's reference wrapper if the current @c std::reference_wrapper provided by the | ||
| /// standard library is not @c constexpr since it was only done then. | ||
| /// | ||
| ////// | ||
| template <typename _Ty> | ||
| using reference_wrapper = | ||
| #if ZTD_TEXT_IS_ON(ZTD_TEXT_STD_LIBRARY_REFERENCE_WRAPPER_CONSTEXPR_I_) | ||
| ::std::reference_wrapper<_Ty> | ||
| #else | ||
| ::ztd::text::__txt_detail::__reference_wrapper<_Ty> | ||
| #endif | ||
| ; | ||
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| ZTD_TEXT_INLINE_ABI_NAMESPACE_CLOSE_I_ | ||
| }} // namespace ztd::text | ||
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| #endif // ZTD_TEXT_DETAIL_REFERENCE_WRAPPER_HPP |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| // ============================================================================= | ||
| // | ||
| // ztd.text | ||
| // Copyright © 2021 JeanHeyd "ThePhD" Meneide and Shepherd's Oasis, LLC | ||
| // Contact: opensource@soasis.org | ||
| // | ||
| // Commercial License Usage | ||
| // Licensees holding valid commercial ztd.text licenses may use this file in | ||
| // accordance with the commercial license agreement provided with the | ||
| // Software or, alternatively, in accordance with the terms contained in | ||
| // a written agreement between you and Shepherd's Oasis, LLC. | ||
| // For licensing terms and conditions see your agreement. For | ||
| // further information contact opensource@soasis.org. | ||
| // | ||
| // Apache License Version 2 Usage | ||
| // Alternatively, this file may be used under the terms of Apache License | ||
| // Version 2.0 (the "License") for non-commercial use; you may not use this | ||
| // file except in compliance with the License. You may obtain a copy of the | ||
| // License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| // | ||
| // ============================================================================> | ||
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| #include <ztd/text/reference_wrapper.hpp> |