105 lines
2.8 KiB
C++
105 lines
2.8 KiB
C++
/*
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* Copyright 2019 by its authors. See AUTHORS.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef EFL_EINA_EINA_TUPLE_HH_
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#define EFL_EINA_EINA_TUPLE_HH_
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#include <eina_integer_sequence.hh>
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#include <eina_logical.hh>
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#include <tuple>
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namespace efl { namespace eina { namespace _mpl {
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template <typename A, typename... Args>
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struct push_back;
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template <template <typename... Args> class C, typename... Args, typename... AArgs>
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struct push_back<C<Args...>, AArgs...>
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{
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typedef C<Args..., AArgs...> type;
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};
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template <typename A, typename... Args>
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struct push_front;
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template <template <typename... Args> class C, typename... Args, typename... AArgs>
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struct push_front<C<Args...>, AArgs...>
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{
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typedef C<Args..., AArgs...> type;
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};
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template <typename A, std::size_t N = 1>
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struct pop_front;
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template <template <typename...> class C, typename T, typename... Args>
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struct pop_front<C<T, Args...>, 1>
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{
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typedef C<Args...> type;
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};
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template <typename A, std::size_t N>
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struct pop_front : pop_front<typename pop_front<A, 1>::type, N-1>
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{
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};
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template <typename T, typename F, std::size_t... I>
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void for_each_impl(T&& t, F&& f, eina::index_sequence<I...>)
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{
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std::initializer_list<int> l = { (f(std::get<I>(t)), 0)...};
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static_cast<void>(l);
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}
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template <typename T, typename F>
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void for_each(T&& t, F&& f)
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{
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_mpl::for_each_impl(t, f, eina::make_index_sequence
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<std::tuple_size<typename std::remove_reference<T>::type>::value>());
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}
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template <typename T, typename Transform>
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struct tuple_transform;
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template <typename...T, typename Transform>
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struct tuple_transform<std::tuple<T...>, Transform>
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{
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typedef std::tuple<typename Transform::template apply<T>::type...> type;
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};
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template <typename T, typename Tuple>
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struct tuple_contains;
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template <typename T, typename...Ts>
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struct tuple_contains<T, std::tuple<Ts...> >
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: _mpl::or_<std::is_same<T, Ts>::value...>
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{
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};
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template <typename T, typename Tuple>
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struct tuple_find : std::integral_constant<int, -1> {};
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template <typename T, typename... Ts>
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struct tuple_find<T, std::tuple<T, Ts...> > : std::integral_constant<std::size_t, 0> {};
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template <typename T, typename T1, typename... Ts>
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struct tuple_find<T, std::tuple<T1, Ts...> > : std::integral_constant
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<std::size_t, 1 + tuple_find<T, std::tuple<Ts...> >::value> {};
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} } }
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#endif
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