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# Conflicts: # include/etl/array.h # include/etl/basic_string.h # include/etl/circular_buffer.h # include/etl/deque.h # include/etl/file_error_numbers.h # include/etl/forward_list.h # include/etl/indirect_vector.h # include/etl/intrusive_forward_list.h # include/etl/intrusive_list.h # include/etl/limits.h # include/etl/list.h # include/etl/private/minmax_pop.h # include/etl/private/minmax_push.h # include/etl/string.h # include/etl/string_view.h # include/etl/u16string.h # include/etl/u32string.h # include/etl/unordered_multimap.h # include/etl/vector.h # include/etl/version.h # include/etl/wstring.h # library.json # library.properties # support/Release notes.txt # test/test_atomic_clang_sync.cpp
126 lines
4.0 KiB
C++
126 lines
4.0 KiB
C++
/******************************************************************************
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The MIT License(MIT)
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Embedded Template Library.
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https://github.com/ETLCPP/etl
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https://www.etlcpp.com
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Copyright(c) 2017 jwellbelove
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files(the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, 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,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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******************************************************************************/
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#ifndef ETL_PARAMETER_PACK
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#define ETL_PARAMETER_PACK
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#include <stdint.h>
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#include "platform.h"
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#include "type_traits.h"
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#if ETL_CPP11_NOT_SUPPORTED
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#if !defined(ETL_IN_UNIT_TEST)
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#error NOT SUPPORTED FOR C++03 OR BELOW
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#endif
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#else
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namespace etl
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{
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//***************************************************************************
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/// parameter_pack
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//***************************************************************************
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template <typename... TTypes>
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class parameter_pack
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{
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public:
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static constexpr size_t size = sizeof...(TTypes);
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//***************************************************************************
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/// index_of_type
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//***************************************************************************
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template <typename T>
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class index_of_type
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{
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private:
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//***********************************
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template <typename Type, typename T1, typename... TRest>
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struct index_of_type_helper
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{
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static constexpr size_t value = etl::is_same<Type, T1>::value ? 1 : 1 + index_of_type_helper<Type, TRest...>::value;
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};
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//***********************************
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template <typename Type, typename T1>
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struct index_of_type_helper<Type, T1>
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{
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static constexpr size_t value = 1;
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};
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public:
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static_assert(etl::is_one_of<T, TTypes...>::value, "T is not in parameter pack");
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/// The idex value.
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static constexpr size_t value = index_of_type_helper<T, TTypes...>::value - 1;
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};
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#if ETL_CPP17_SUPPORTED
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template <typename T>
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static constexpr size_t index_of_type_v = index_of_type<T>::value;
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#endif
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//***************************************************************************
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/// type_from_index
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//***************************************************************************
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template <size_t I>
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class type_from_index
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{
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private:
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//***********************************
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template <size_t II, size_t N, typename T1, typename... TRest>
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struct type_from_index_helper
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{
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using type = typename etl::conditional<II == N, T1, typename type_from_index_helper<II, N + 1, TRest...>::type>::type;
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};
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//***********************************
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template <size_t II, size_t N, typename T1>
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struct type_from_index_helper<II, N, T1>
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{
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using type = T1;
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};
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public:
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static_assert(I < sizeof...(TTypes), "Index out of bounds of parameter pack");
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/// Template alias
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using type = typename type_from_index_helper<I, 0, TTypes...>::type;
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};
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//***********************************
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template <size_t I>
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using type_from_index_t = typename type_from_index<I>::type;
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};
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}
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#endif
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#endif
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