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Eigen  3.4.0
details.h
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#include <cstddef>
19
20namespace Eigen {
21
22 // This one is needed to prevent reimplementing the whole std::vector.
23 template <class T>
24 class aligned_allocator_indirection : public EIGEN_ALIGNED_ALLOCATOR<T>
25 {
26 public:
27 typedef std::size_t size_type;
28 typedef std::ptrdiff_t difference_type;
29 typedef T* pointer;
30 typedef const T* const_pointer;
31 typedef T& reference;
32 typedef const T& const_reference;
33 typedef T value_type;
34
35 template<class U>
36 struct rebind
37 {
38 typedef aligned_allocator_indirection<U> other;
39 };
40
41 aligned_allocator_indirection() {}
42 aligned_allocator_indirection(const aligned_allocator_indirection& ) : EIGEN_ALIGNED_ALLOCATOR<T>() {}
43 aligned_allocator_indirection(const EIGEN_ALIGNED_ALLOCATOR<T>& ) {}
44 template<class U>
45 aligned_allocator_indirection(const aligned_allocator_indirection<U>& ) {}
46 template<class U>
47 aligned_allocator_indirection(const EIGEN_ALIGNED_ALLOCATOR<U>& ) {}
48 ~aligned_allocator_indirection() {}
49 };
50
51#if EIGEN_COMP_MSVC
52
53 // sometimes, MSVC detects, at compile time, that the argument x
54 // in std::vector::resize(size_t s,T x) won't be aligned and generate an error
55 // even if this function is never called. Whence this little wrapper.
56#define EIGEN_WORKAROUND_MSVC_STL_SUPPORT(T) \
57 typename Eigen::internal::conditional< \
58 Eigen::internal::is_arithmetic<T>::value, \
59 T, \
60 Eigen::internal::workaround_msvc_stl_support<T> \
61 >::type
62
63 namespace internal {
64 template<typename T> struct workaround_msvc_stl_support : public T
65 {
66 inline workaround_msvc_stl_support() : T() {}
67 inline workaround_msvc_stl_support(const T& other) : T(other) {}
68 inline operator T& () { return *static_cast<T*>(this); }
69 inline operator const T& () const { return *static_cast<const T*>(this); }
70 template<typename OtherT>
71 inline T& operator=(const OtherT& other)
72 { T::operator=(other); return *this; }
73 inline workaround_msvc_stl_support& operator=(const workaround_msvc_stl_support& other)
74 { T::operator=(other); return *this; }
75 };
76 }
77
78#else
79
80#define EIGEN_WORKAROUND_MSVC_STL_SUPPORT(T) T
81
82#endif
83
84}
85
86#endif // EIGEN_STL_DETAILS_H
Namespace containing all symbols from the Eigen library.
Definition: Core:141