// This file is part of Eigen, a lightweight C++ template library // for linear algebra. // // Copyright (C) 2008-2010 Gael Guennebaud <gael.guennebaud@inria.fr> // // This Source Code Form is subject to the terms of the Mozilla // Public License v. 2.0. If a copy of the MPL was not distributed // with this file, You can obtain one at http://mozilla.org/MPL/2.0/. #ifndef EIGEN_STL_FUNCTORS_H#define EIGEN_STL_FUNCTORS_Hnamespace Eigen {// Portable replacements for certain functors. namespace numext {template <typename T = void >struct equal_to {typedef bool result_type;bool operator ()(const T& lhs, const T& rhs) const {return lhs == rhs;template <typename T = void >struct not_equal_to {typedef bool result_type;bool operator ()(const T& lhs, const T& rhs) const {return lhs != rhs;namespace internal {// default functor traits for STL functors: template <typename T>struct functor_traits<std::multiplies<T> >enum { Cost = NumTraits<T>::MulCost, PacketAccess = false }; };template <typename T>struct functor_traits<std::divides<T> >enum { Cost = NumTraits<T>::MulCost, PacketAccess = false }; };template <typename T>struct functor_traits<std::plus<T> >enum { Cost = NumTraits<T>::AddCost, PacketAccess = false }; };template <typename T>struct functor_traits<std::minus<T> >enum { Cost = NumTraits<T>::AddCost, PacketAccess = false }; };template <typename T>struct functor_traits<std::negate<T> >enum { Cost = NumTraits<T>::AddCost, PacketAccess = false }; };template <typename T>struct functor_traits<std::logical_or<T> >enum { Cost = 1, PacketAccess = false }; };template <typename T>struct functor_traits<std::logical_and<T> >enum { Cost = 1, PacketAccess = false }; };template <typename T>struct functor_traits<std::logical_not<T> >enum { Cost = 1, PacketAccess = false }; };template <typename T>struct functor_traits<std::greater<T> >enum { Cost = 1, PacketAccess = false }; };template <typename T>struct functor_traits<std::less<T> >enum { Cost = 1, PacketAccess = false }; };template <typename T>struct functor_traits<std::greater_equal<T> >enum { Cost = 1, PacketAccess = false }; };template <typename T>struct functor_traits<std::less_equal<T> >enum { Cost = 1, PacketAccess = false }; };template <typename T>struct functor_traits<std::equal_to<T> >enum { Cost = 1, PacketAccess = false }; };template <typename T>struct functor_traits<numext::equal_to<T> >template <typename T>struct functor_traits<std::not_equal_to<T> >enum { Cost = 1, PacketAccess = false }; };template <typename T>struct functor_traits<numext::not_equal_to<T> >#if (EIGEN_COMP_CXXVER < 11)// std::binder* are deprecated since c++11 and will be removed in c++17 template <typename T>struct functor_traits<std::binder2nd<T> >enum { Cost = functor_traits<T>::Cost, PacketAccess = false }; };template <typename T>struct functor_traits<std::binder1st<T> >enum { Cost = functor_traits<T>::Cost, PacketAccess = false }; };#endif #if (EIGEN_COMP_CXXVER < 17)// std::unary_negate is deprecated since c++17 and will be removed in c++20 template <typename T>struct functor_traits<std::unary_negate<T> >enum { Cost = 1 + functor_traits<T>::Cost, PacketAccess = false }; };// std::binary_negate is deprecated since c++17 and will be removed in c++20 template <typename T>struct functor_traits<std::binary_negate<T> >enum { Cost = 1 + functor_traits<T>::Cost, PacketAccess = false }; };#endif #ifdef EIGEN_STDEXT_SUPPORTtemplate <typename T0,typename T1>struct functor_traits<std::project1st<T0,T1> >enum { Cost = 0, PacketAccess = false }; };template <typename T0,typename T1>struct functor_traits<std::project2nd<T0,T1> >enum { Cost = 0, PacketAccess = false }; };template <typename T0,typename T1>struct functor_traits<std::select2nd<std::pair<T0,T1> > >enum { Cost = 0, PacketAccess = false }; };template <typename T0,typename T1>struct functor_traits<std::select1st<std::pair<T0,T1> > >enum { Cost = 0, PacketAccess = false }; };template <typename T0,typename T1>struct functor_traits<std::unary_compose<T0,T1> >enum { Cost = functor_traits<T0>::Cost + functor_traits<T1>::Cost, PacketAccess = false }; };template <typename T0,typename T1,typename T2>struct functor_traits<std::binary_compose<T0,T1,T2> >enum { Cost = functor_traits<T0>::Cost + functor_traits<T1>::Cost + functor_traits<T2>::Cost, PacketAccess = false }; };#endif // EIGEN_STDEXT_SUPPORT // allow to add new functors and specializations of functor_traits from outside Eigen. // this macro is really needed because functor_traits must be specialized after it is declared but before it is used... #ifdef EIGEN_FUNCTORS_PLUGIN#include EIGEN_FUNCTORS_PLUGIN#endif // end namespace internal // end namespace Eigen #endif // EIGEN_STL_FUNCTORS_H quality 100%
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