mirror of
https://gitlab.kitware.com/vtk/vtk-m
synced 2024-09-16 17:22:55 +00:00
18c4b3258b
The brigand third party library has become more problematic as we move forward. Replace the use of brigand in List.h with our own implementation.
764 lines
22 KiB
C++
764 lines
22 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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//
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//============================================================================
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#ifndef vtk_m_List_h
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#define vtk_m_List_h
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#include <vtkm/Types.h>
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namespace vtkm
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{
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template <typename... Ts>
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struct List
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{
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};
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namespace detail
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{
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// This prototype is here to detect deprecated ListTag objects. When ListTags are removed, then
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// this should be removed too.
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struct ListRoot;
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}
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namespace internal
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{
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template <typename T>
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struct IsListImpl
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{
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// This prototype is here to detect deprecated ListTag objects. When ListTags are removed, then
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// this should be changed to be just std::false_type.
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using type = std::is_base_of<vtkm::detail::ListRoot, T>;
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};
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template <typename... Ts>
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struct IsListImpl<vtkm::List<Ts...>>
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{
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using type = std::true_type;
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};
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template <typename T>
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using IsList = typename vtkm::internal::IsListImpl<T>::type;
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} // namespace internal
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/// Checks that the argument is a proper list. This is a handy concept
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/// check for functions and classes to make sure that a template argument is
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/// actually a device adapter tag. (You can get weird errors elsewhere in the
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/// code when a mistake is made.)
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///
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#define VTKM_IS_LIST(type) \
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VTKM_STATIC_ASSERT_MSG((::vtkm::internal::IsList<type>::value), \
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"Provided type is not a valid VTK-m list type.")
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namespace detail
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{
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/// list value that is used to represent a list actually matches all values
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struct UniversalTypeTag
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{
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//We never want this tag constructed, and by deleting the constructor
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//we get an error when trying to use this class with ForEach.
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UniversalTypeTag() = delete;
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};
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} // namespace detail
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namespace internal
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{
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// This is here so that the old (deprecated) `ListTag`s can convert themselves to the new
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// `List` style and be operated on. When that deprecated functionality goes away, we can
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// probably remove `AsList` and just operate directly on the `List`s.
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template <typename T>
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struct AsListImpl;
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template <typename... Ts>
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struct AsListImpl<vtkm::List<Ts...>>
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{
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using type = vtkm::List<Ts...>;
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};
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template <typename T>
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using AsList = typename AsListImpl<T>::type;
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}
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/// A special tag for an empty list.
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///
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using ListEmpty = vtkm::List<>;
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/// A special tag for a list that represents holding all potential values
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///
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/// Note: Can not be used with ForEach and some list transforms for obvious reasons.
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using ListUniversal = vtkm::List<detail::UniversalTypeTag>;
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namespace detail
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{
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template <typename T, template <typename...> class Target>
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struct ListApplyImpl;
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template <typename... Ts, template <typename...> class Target>
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struct ListApplyImpl<vtkm::List<Ts...>, Target>
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{
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using type = Target<Ts...>;
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};
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// Cannot apply the universal list.
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template <template <typename...> class Target>
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struct ListApplyImpl<vtkm::ListUniversal, Target>;
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} // namespace detail
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/// \brief Applies the list of types to a template.
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///
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/// Given a ListTag and a templated class, returns the class instantiated with the types
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/// represented by the ListTag.
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///
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template <typename List, template <typename...> class Target>
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using ListApply = typename detail::ListApplyImpl<internal::AsList<List>, Target>::type;
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namespace detail
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{
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template <typename L>
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struct ListSizeImpl;
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template <typename... Ts>
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struct ListSizeImpl<vtkm::List<Ts...>>
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{
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using type =
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std::integral_constant<vtkm::IdComponent, static_cast<vtkm::IdComponent>(sizeof...(Ts))>;
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};
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} // namespace detail
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/// Becomes an std::integral_constant containing the number of types in a list.
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///
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template <typename List>
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using ListSize = typename detail::ListSizeImpl<internal::AsList<List>>::type;
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namespace detail
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{
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template <vtkm::IdComponent I, bool LessThan8, typename L>
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struct ListAtImpl;
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template <typename Tx, typename... Ts>
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struct ListAtImpl<0, true, vtkm::List<Tx, Ts...>>
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{
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using type = Tx;
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};
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template <typename T0, typename Tx, typename... Ts>
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struct ListAtImpl<1, true, vtkm::List<T0, Tx, Ts...>>
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{
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using type = Tx;
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};
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template <typename T0, typename T1, typename Tx, typename... Ts>
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struct ListAtImpl<2, true, vtkm::List<T0, T1, Tx, Ts...>>
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{
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using type = Tx;
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};
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template <typename T0, typename T1, typename T2, typename Tx, typename... Ts>
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struct ListAtImpl<3, true, vtkm::List<T0, T1, T2, Tx, Ts...>>
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{
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using type = Tx;
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};
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template <typename T0, typename T1, typename T2, typename T3, typename Tx, typename... Ts>
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struct ListAtImpl<4, true, vtkm::List<T0, T1, T2, T3, Tx, Ts...>>
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{
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using type = Tx;
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};
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template <typename T0,
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typename T1,
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typename T2,
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typename T3,
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typename T4,
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typename Tx,
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typename... Ts>
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struct ListAtImpl<5, true, vtkm::List<T0, T1, T2, T3, T4, Tx, Ts...>>
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{
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using type = Tx;
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};
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template <typename T0,
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typename T1,
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typename T2,
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typename T3,
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typename T4,
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typename T5,
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typename Tx,
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typename... Ts>
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struct ListAtImpl<6, true, vtkm::List<T0, T1, T2, T3, T4, T5, Tx, Ts...>>
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{
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using type = Tx;
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};
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template <typename T0,
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typename T1,
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typename T2,
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typename T3,
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typename T4,
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typename T5,
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typename T6,
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typename Tx,
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typename... Ts>
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struct ListAtImpl<7, true, vtkm::List<T0, T1, T2, T3, T4, T5, T6, Tx, Ts...>>
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{
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using type = Tx;
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};
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template <vtkm::IdComponent I,
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typename T0,
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typename T1,
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typename T2,
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typename T3,
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typename T4,
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typename T5,
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typename T6,
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typename T7,
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typename... Ts>
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struct ListAtImpl<I, false, vtkm::List<T0, T1, T2, T3, T4, T5, T6, T7, Ts...>>
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: ListAtImpl<I - 8, ((I - 8) < 8), vtkm::List<Ts...>>
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{
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};
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} // namespace detail
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/// \brief Finds the type at the given index.
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///
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/// This becomes the type of the list at the given index.
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///
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template <typename List, vtkm::IdComponent Index>
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using ListAt = typename detail::ListAtImpl<Index, (Index < 8), internal::AsList<List>>::type;
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namespace detail
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{
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template <vtkm::IdComponent NumSearched, typename Target, typename... Remaining>
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struct FindFirstOfType;
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// Not found
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template <vtkm::IdComponent NumSearched, typename Target>
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struct FindFirstOfType<NumSearched, Target> : std::integral_constant<vtkm::IdComponent, -1>
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{
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};
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// Basic search next one
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template <bool NextIsTarget, vtkm::IdComponent NumSearched, typename Target, typename... Remaining>
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struct FindFirstOfCheckHead;
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template <vtkm::IdComponent NumSearched, typename Target, typename... Ts>
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struct FindFirstOfCheckHead<true, NumSearched, Target, Ts...>
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: std::integral_constant<vtkm::IdComponent, NumSearched>
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{
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};
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template <vtkm::IdComponent NumSearched, typename Target, typename Next, typename... Remaining>
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struct FindFirstOfCheckHead<false, NumSearched, Target, Next, Remaining...>
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: FindFirstOfCheckHead<std::is_same<Target, Next>::value, NumSearched + 1, Target, Remaining...>
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{
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};
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// Not found
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template <vtkm::IdComponent NumSearched, typename Target>
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struct FindFirstOfCheckHead<false, NumSearched, Target>
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: std::integral_constant<vtkm::IdComponent, -1>
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{
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};
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template <vtkm::IdComponent NumSearched, typename Target, typename Next, typename... Remaining>
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struct FindFirstOfType<NumSearched, Target, Next, Remaining...>
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: FindFirstOfCheckHead<std::is_same<Target, Next>::value, NumSearched, Target, Remaining...>
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{
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};
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// If there are at least 6 entries, check the first 4 to quickly narrow down
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template <bool OneInFirst4Matches, vtkm::IdComponent NumSearched, typename Target, typename... Ts>
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struct FindFirstOfSplit4;
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template <vtkm::IdComponent NumSearched,
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typename Target,
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typename T0,
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typename T1,
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typename T2,
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typename T3,
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typename... Ts>
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struct FindFirstOfSplit4<true, NumSearched, Target, T0, T1, T2, T3, Ts...>
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: FindFirstOfCheckHead<std::is_same<Target, T0>::value, NumSearched, Target, T1, T2, T3>
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{
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};
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template <vtkm::IdComponent NumSearched,
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typename Target,
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typename T0,
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typename T1,
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typename T2,
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typename T3,
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typename T4,
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typename... Ts>
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struct FindFirstOfSplit4<false, NumSearched, Target, T0, T1, T2, T3, T4, Ts...>
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: FindFirstOfCheckHead<std::is_same<Target, T4>::value, NumSearched + 4, Target, Ts...>
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{
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};
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template <vtkm::IdComponent NumSearched,
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typename Target,
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typename T0,
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typename T1,
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typename T2,
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typename T3,
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typename T4,
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typename T5,
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typename... Ts>
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struct FindFirstOfType<NumSearched, Target, T0, T1, T2, T3, T4, T5, Ts...>
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: FindFirstOfSplit4<(std::is_same<Target, T0>::value || std::is_same<Target, T1>::value ||
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std::is_same<Target, T2>::value || std::is_same<Target, T3>::value),
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NumSearched,
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Target,
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T0,
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T1,
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T2,
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T3,
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T4,
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T5,
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Ts...>
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{
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};
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// If there are at least 12 entries, check the first 8 to quickly narrow down
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template <bool OneInFirst8Matches, vtkm::IdComponent NumSearched, typename Target, typename... Ts>
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struct FindFirstOfSplit8;
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template <vtkm::IdComponent NumSearched,
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typename Target,
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typename T0,
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typename T1,
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typename T2,
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typename T3,
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typename T4,
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typename T5,
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typename T6,
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typename T7,
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typename... Ts>
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struct FindFirstOfSplit8<true, NumSearched, Target, T0, T1, T2, T3, T4, T5, T6, T7, Ts...>
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: FindFirstOfSplit4<(std::is_same<Target, T0>::value || std::is_same<Target, T1>::value ||
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std::is_same<Target, T2>::value || std::is_same<Target, T3>::value),
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NumSearched,
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Target,
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T0,
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T1,
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T2,
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T3,
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T4,
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T5,
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T6,
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T7>
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{
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};
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template <vtkm::IdComponent NumSearched,
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typename Target,
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typename T0,
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typename T1,
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typename T2,
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typename T3,
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typename T4,
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typename T5,
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typename T6,
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typename T7,
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typename... Ts>
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struct FindFirstOfSplit8<false, NumSearched, Target, T0, T1, T2, T3, T4, T5, T6, T7, Ts...>
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: FindFirstOfType<NumSearched + 8, Target, Ts...>
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{
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};
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template <vtkm::IdComponent NumSearched,
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typename Target,
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typename T0,
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typename T1,
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typename T2,
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typename T3,
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typename T4,
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typename T5,
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typename T6,
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typename T7,
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typename T8,
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typename T9,
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typename T10,
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typename T11,
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typename... Ts>
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struct FindFirstOfType<NumSearched, Target, T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, Ts...>
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: FindFirstOfSplit8<(std::is_same<Target, T0>::value || std::is_same<Target, T1>::value ||
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std::is_same<Target, T2>::value || std::is_same<Target, T3>::value ||
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std::is_same<Target, T4>::value || std::is_same<Target, T5>::value ||
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std::is_same<Target, T6>::value || std::is_same<Target, T7>::value),
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NumSearched,
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Target,
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T0,
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T1,
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T2,
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T3,
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T4,
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T5,
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T6,
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T7,
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T8,
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T9,
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T10,
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T11,
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Ts...>
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{
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};
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template <typename List, typename Target>
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struct ListIndexOfImpl;
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template <typename... Ts, typename Target>
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struct ListIndexOfImpl<vtkm::List<Ts...>, Target>
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{
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using type = std::integral_constant<vtkm::IdComponent, FindFirstOfType<0, Target, Ts...>::value>;
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};
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template <typename Target>
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struct ListIndexOfImpl<vtkm::ListUniversal, Target>
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{
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VTKM_STATIC_ASSERT_MSG((std::is_same<Target, void>::value && std::is_same<Target, int>::value),
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"Cannot get indices in a universal list.");
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};
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} // namespace detail
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/// \brief Finds the index of a given type.
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///
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/// Becomes a `std::integral_constant` for the index of the given type. If the
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/// given type is not in the list, the value is set to -1.
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///
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template <typename List, typename T>
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using ListIndexOf = typename detail::ListIndexOfImpl<internal::AsList<List>, T>::type;
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namespace detail
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{
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template <typename List, typename T>
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struct ListHasImpl
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{
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using type = std::integral_constant<bool, (vtkm::ListIndexOf<List, T>::value >= 0)>;
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};
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template <typename T>
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struct ListHasImpl<vtkm::ListUniversal, T>
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{
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using type = std::true_type;
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};
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} // namespace detail
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/// \brief Checks to see if the given `T` is in the list pointed to by `List`.
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///
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/// Becomes `std::true_type` if the `T` is in `List`. `std::false_type` otherwise.
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///
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template <typename List, typename T>
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using ListHas = typename detail::ListHasImpl<internal::AsList<List>, T>::type;
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namespace detail
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{
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template <typename... Ls>
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struct ListAppendImpl;
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template <>
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struct ListAppendImpl<>
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{
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using type = vtkm::ListEmpty;
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};
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template <typename L>
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struct ListAppendImpl<L>
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{
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using type = L;
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};
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template <typename... T0s, typename... T1s>
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struct ListAppendImpl<vtkm::List<T0s...>, vtkm::List<T1s...>>
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{
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using type = vtkm::List<T0s..., T1s...>;
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};
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template <typename... T0s, typename... T1s, typename... T2s>
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struct ListAppendImpl<vtkm::List<T0s...>, vtkm::List<T1s...>, vtkm::List<T2s...>>
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{
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using type = vtkm::List<T0s..., T1s..., T2s...>;
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};
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template <typename... T0s, typename... T1s, typename... T2s, typename... T3s>
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struct ListAppendImpl<vtkm::List<T0s...>,
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vtkm::List<T1s...>,
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vtkm::List<T2s...>,
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vtkm::List<T3s...>>
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{
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using type = vtkm::List<T0s..., T1s..., T2s..., T3s...>;
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};
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template <typename... T0s, typename... T1s, typename... T2s, typename... T3s, typename... T4s>
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struct ListAppendImpl<vtkm::List<T0s...>,
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vtkm::List<T1s...>,
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vtkm::List<T2s...>,
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vtkm::List<T3s...>,
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vtkm::List<T4s...>>
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{
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using type = vtkm::List<T0s..., T1s..., T2s..., T3s..., T4s...>;
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};
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template <typename... T0s,
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typename... T1s,
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typename... T2s,
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typename... T3s,
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typename... T4s,
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typename... T5s>
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struct ListAppendImpl<vtkm::List<T0s...>,
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vtkm::List<T1s...>,
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vtkm::List<T2s...>,
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vtkm::List<T3s...>,
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vtkm::List<T4s...>,
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vtkm::List<T5s...>>
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{
|
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using type = vtkm::List<T0s..., T1s..., T2s..., T3s..., T4s..., T5s...>;
|
|
};
|
|
|
|
template <typename... T0s,
|
|
typename... T1s,
|
|
typename... T2s,
|
|
typename... T3s,
|
|
typename... T4s,
|
|
typename... T5s,
|
|
typename... T6s>
|
|
struct ListAppendImpl<vtkm::List<T0s...>,
|
|
vtkm::List<T1s...>,
|
|
vtkm::List<T2s...>,
|
|
vtkm::List<T3s...>,
|
|
vtkm::List<T4s...>,
|
|
vtkm::List<T5s...>,
|
|
vtkm::List<T6s...>>
|
|
{
|
|
using type = vtkm::List<T0s..., T1s..., T2s..., T3s..., T4s..., T5s..., T6s...>;
|
|
};
|
|
|
|
template <typename... T0s,
|
|
typename... T1s,
|
|
typename... T2s,
|
|
typename... T3s,
|
|
typename... T4s,
|
|
typename... T5s,
|
|
typename... T6s,
|
|
typename... T7s>
|
|
struct ListAppendImpl<vtkm::List<T0s...>,
|
|
vtkm::List<T1s...>,
|
|
vtkm::List<T2s...>,
|
|
vtkm::List<T3s...>,
|
|
vtkm::List<T4s...>,
|
|
vtkm::List<T5s...>,
|
|
vtkm::List<T6s...>,
|
|
vtkm::List<T7s...>>
|
|
{
|
|
using type = vtkm::List<T0s..., T1s..., T2s..., T3s..., T4s..., T5s..., T6s..., T7s...>;
|
|
};
|
|
|
|
template <typename... T0s,
|
|
typename... T1s,
|
|
typename... T2s,
|
|
typename... T3s,
|
|
typename... T4s,
|
|
typename... T5s,
|
|
typename... T6s,
|
|
typename... T7s,
|
|
typename... Ls>
|
|
struct ListAppendImpl<vtkm::List<T0s...>,
|
|
vtkm::List<T1s...>,
|
|
vtkm::List<T2s...>,
|
|
vtkm::List<T3s...>,
|
|
vtkm::List<T4s...>,
|
|
vtkm::List<T5s...>,
|
|
vtkm::List<T6s...>,
|
|
vtkm::List<T7s...>,
|
|
Ls...>
|
|
: ListAppendImpl<vtkm::List<T0s..., T1s..., T2s..., T3s..., T4s..., T5s..., T6s..., T7s...>,
|
|
Ls...>
|
|
{
|
|
};
|
|
|
|
} // namespace detail
|
|
|
|
/// Concatinates a set of lists into a single list.
|
|
///
|
|
/// Note that this does not work correctly with `vtkm::ListUniversal`.
|
|
template <typename... Lists>
|
|
using ListAppend = typename detail::ListAppendImpl<internal::AsList<Lists>...>::type;
|
|
|
|
namespace detail
|
|
{
|
|
|
|
template <typename T, template <typename> class Target>
|
|
struct ListTransformImpl;
|
|
template <typename... Ts, template <typename> class Target>
|
|
struct ListTransformImpl<vtkm::List<Ts...>, Target>
|
|
{
|
|
using type = vtkm::List<Target<Ts>...>;
|
|
};
|
|
// Cannot transform the universal list.
|
|
template <template <typename> class Target>
|
|
struct ListTransformImpl<vtkm::ListUniversal, Target>;
|
|
|
|
} // namespace detail
|
|
|
|
/// Constructs a list containing all types in a source list applied to a transform template.
|
|
///
|
|
template <typename List, template <typename> class Transform>
|
|
using ListTransform = typename detail::ListTransformImpl<internal::AsList<List>, Transform>::type;
|
|
|
|
namespace detail
|
|
{
|
|
|
|
template <typename L, template <typename> class Predicate>
|
|
struct ListRemoveIfImpl;
|
|
|
|
template <typename... Ts, template <typename> class Predicate>
|
|
struct ListRemoveIfImpl<vtkm::List<Ts...>, Predicate>
|
|
{
|
|
using type = typename ListAppendImpl<
|
|
std::conditional_t<Predicate<Ts>::value, vtkm::List<>, vtkm::List<Ts>>...>::type;
|
|
};
|
|
|
|
} // namespace detail
|
|
|
|
/// Takes an existing `List` and a predicate template that is applied to each type in the `List`.
|
|
/// Any type in the `List` that has a value element equal to true (the equivalent of
|
|
/// `std::true_type`), that item will be removed from the list. For example the following type
|
|
///
|
|
/// ```cpp
|
|
/// vtkm::ListRemoveIf<vtkm::List<int, float, long long, double>, std::is_integral>
|
|
/// ```
|
|
///
|
|
/// resolves to a `List` that is equivalent to `vtkm::List<float, double>` because
|
|
/// `std::is_integral<int>` and `std::is_integral<long long>` resolve to `std::true_type` whereas
|
|
/// `std::is_integral<float>` and `std::is_integral<double>` resolve to `std::false_type`.
|
|
///
|
|
template <typename List, template <typename> class Predicate>
|
|
using ListRemoveIf = typename detail::ListRemoveIfImpl<internal::AsList<List>, Predicate>::type;
|
|
|
|
namespace detail
|
|
{
|
|
|
|
template <typename List1, typename List2>
|
|
struct ListIntersectImpl
|
|
{
|
|
template <typename T>
|
|
struct Predicate
|
|
{
|
|
static constexpr bool value = !vtkm::ListHas<List1, T>::value;
|
|
};
|
|
|
|
using type = vtkm::ListRemoveIf<List2, Predicate>;
|
|
};
|
|
|
|
template <typename List1>
|
|
struct ListIntersectImpl<List1, vtkm::ListUniversal>
|
|
{
|
|
using type = List1;
|
|
};
|
|
template <typename List2>
|
|
struct ListIntersectImpl<vtkm::ListUniversal, List2>
|
|
{
|
|
using type = List2;
|
|
};
|
|
template <>
|
|
struct ListIntersectImpl<vtkm::ListUniversal, vtkm::ListUniversal>
|
|
{
|
|
using type = vtkm::ListUniversal;
|
|
};
|
|
|
|
} // namespace detail
|
|
|
|
/// Constructs a list containing types present in all lists.
|
|
///
|
|
template <typename List1, typename List2>
|
|
using ListIntersect =
|
|
typename detail::ListIntersectImpl<internal::AsList<List1>, internal::AsList<List2>>::type;
|
|
|
|
namespace detail
|
|
{
|
|
|
|
// We want to use an initializer list as a trick to call a function once for each type, but
|
|
// an initializer list needs a type, so create wrapper function that returns a value.
|
|
VTKM_SUPPRESS_EXEC_WARNINGS
|
|
template <typename Functor, typename... Args>
|
|
VTKM_EXEC_CONT inline bool ListForEachCallThrough(Functor&& f, Args&&... args)
|
|
{
|
|
f(std::forward<Args>(args)...);
|
|
return false; // Return value does not matter. Hopefully just thrown away.
|
|
}
|
|
|
|
VTKM_SUPPRESS_EXEC_WARNINGS
|
|
template <typename Functor, typename... Ts, typename... Args>
|
|
VTKM_EXEC_CONT void ListForEachImpl(Functor&& f, vtkm::List<Ts...>, Args&&... args)
|
|
{
|
|
VTKM_STATIC_ASSERT_MSG((!std::is_same<vtkm::List<Ts...>, vtkm::ListUniversal>::value),
|
|
"Cannot call ListFor on vtkm::ListUniversal.");
|
|
auto init_list = { ListForEachCallThrough(
|
|
std::forward<Functor>(f), Ts{}, std::forward<Args>(args)...)... };
|
|
(void)init_list;
|
|
}
|
|
|
|
template <typename Functor, typename... Args>
|
|
VTKM_EXEC_CONT void ListForEachImpl(Functor&&, vtkm::ListEmpty, Args&&...)
|
|
{
|
|
// No types to run functor on.
|
|
}
|
|
|
|
} // namespace detail
|
|
|
|
/// For each typename represented by the list, call the functor with a
|
|
/// default instance of that type.
|
|
///
|
|
template <typename Functor, typename List, typename... Args>
|
|
VTKM_EXEC_CONT void ListForEach(Functor&& f, List, Args&&... args)
|
|
{
|
|
detail::ListForEachImpl(
|
|
std::forward<Functor>(f), internal::AsList<List>{}, std::forward<Args>(args)...);
|
|
}
|
|
|
|
namespace detail
|
|
{
|
|
|
|
template <typename List1, typename List2>
|
|
struct ListCrossImpl;
|
|
|
|
template <typename... T0s, typename... T1s>
|
|
struct ListCrossImpl<vtkm::List<T0s...>, vtkm::List<T1s...>>
|
|
{
|
|
template <typename T>
|
|
struct Predicate
|
|
{
|
|
using type = vtkm::List<vtkm::List<T, T1s>...>;
|
|
};
|
|
|
|
using type = vtkm::ListAppend<typename Predicate<T0s>::type...>;
|
|
};
|
|
|
|
} // namespace detail
|
|
|
|
/// \brief Generates a list that is the cross product of two input lists.
|
|
///
|
|
/// The resulting list has the form of `vtkm::List<vtkm::List<A1,B1>, vtkm::List<A1,B2>,...>`
|
|
///
|
|
template <typename List1, typename List2>
|
|
using ListCross =
|
|
typename detail::ListCrossImpl<internal::AsList<List1>, internal::AsList<List2>>::type;
|
|
|
|
} // namespace vtkm
|
|
|
|
#endif //vtk_m_List_h
|