1 // This file is part of Eigen, a lightweight C++ template library 2 // for linear algebra. 3 // 4 // Copyright (C) 2009 Gael Guennebaud <gael.guennebaud@inria.fr> 5 // Copyright (C) 2009 Hauke Heibel <hauke.heibel@googlemail.com> 6 // 7 // This Source Code Form is subject to the terms of the Mozilla 8 // Public License v. 2.0. If a copy of the MPL was not distributed 9 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/. 10 11 #ifndef EIGEN_STL_DETAILS_H 12 #define EIGEN_STL_DETAILS_H 13 14 #ifndef EIGEN_ALIGNED_ALLOCATOR 15 #define EIGEN_ALIGNED_ALLOCATOR Eigen::aligned_allocator 16 #endif 17 18 namespace Eigen { 19 20 // This one is needed to prevent reimplementing the whole std::vector. 21 template <class T> 22 class aligned_allocator_indirection : public EIGEN_ALIGNED_ALLOCATOR<T> 23 { 24 public: 25 typedef std::size_t size_type; 26 typedef std::ptrdiff_t difference_type; 27 typedef T* pointer; 28 typedef const T* const_pointer; 29 typedef T& reference; 30 typedef const T& const_reference; 31 typedef T value_type; 32 33 template<class U> 34 struct rebind 35 { 36 typedef aligned_allocator_indirection<U> other; 37 }; 38 aligned_allocator_indirection()39 aligned_allocator_indirection() {} aligned_allocator_indirection(const aligned_allocator_indirection &)40 aligned_allocator_indirection(const aligned_allocator_indirection& ) : EIGEN_ALIGNED_ALLOCATOR<T>() {} aligned_allocator_indirection(const EIGEN_ALIGNED_ALLOCATOR<T> &)41 aligned_allocator_indirection(const EIGEN_ALIGNED_ALLOCATOR<T>& ) {} 42 template<class U> aligned_allocator_indirection(const aligned_allocator_indirection<U> &)43 aligned_allocator_indirection(const aligned_allocator_indirection<U>& ) {} 44 template<class U> aligned_allocator_indirection(const EIGEN_ALIGNED_ALLOCATOR<U> &)45 aligned_allocator_indirection(const EIGEN_ALIGNED_ALLOCATOR<U>& ) {} ~aligned_allocator_indirection()46 ~aligned_allocator_indirection() {} 47 }; 48 49 #if EIGEN_COMP_MSVC 50 51 // sometimes, MSVC detects, at compile time, that the argument x 52 // in std::vector::resize(size_t s,T x) won't be aligned and generate an error 53 // even if this function is never called. Whence this little wrapper. 54 #define EIGEN_WORKAROUND_MSVC_STL_SUPPORT(T) \ 55 typename Eigen::internal::conditional< \ 56 Eigen::internal::is_arithmetic<T>::value, \ 57 T, \ 58 Eigen::internal::workaround_msvc_stl_support<T> \ 59 >::type 60 61 namespace internal { 62 template<typename T> struct workaround_msvc_stl_support : public T 63 { workaround_msvc_stl_supportworkaround_msvc_stl_support64 inline workaround_msvc_stl_support() : T() {} workaround_msvc_stl_supportworkaround_msvc_stl_support65 inline workaround_msvc_stl_support(const T& other) : T(other) {} 66 inline operator T& () { return *static_cast<T*>(this); } 67 inline operator const T& () const { return *static_cast<const T*>(this); } 68 template<typename OtherT> 69 inline T& operator=(const OtherT& other) 70 { T::operator=(other); return *this; } 71 inline workaround_msvc_stl_support& operator=(const workaround_msvc_stl_support& other) 72 { T::operator=(other); return *this; } 73 }; 74 } 75 76 #else 77 78 #define EIGEN_WORKAROUND_MSVC_STL_SUPPORT(T) T 79 80 #endif 81 82 } 83 84 #endif // EIGEN_STL_DETAILS_H 85