100 lines
3.4 KiB
C++
100 lines
3.4 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2009 Gael Guennebaud <gael.guennebaud@inria.fr>
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// Copyright (C) 2009 Hauke Heibel <hauke.heibel@googlemail.com>
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//
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// Eigen is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 3 of the License, or (at your option) any later version.
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//
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// Alternatively, you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of
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// the License, or (at your option) any later version.
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//
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// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License and a copy of the GNU General Public License along with
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// Eigen. If not, see <http://www.gnu.org/licenses/>.
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#ifndef EIGEN_STL_DETAILS_H
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#define EIGEN_STL_DETAILS_H
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#ifndef EIGEN_ALIGNED_ALLOCATOR
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#define EIGEN_ALIGNED_ALLOCATOR Eigen::aligned_allocator
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#endif
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namespace Eigen {
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// This one is needed to prevent reimplementing the whole std::vector.
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template <class T>
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class aligned_allocator_indirection : public EIGEN_ALIGNED_ALLOCATOR<T>
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{
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public:
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typedef size_t size_type;
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typedef std::ptrdiff_t difference_type;
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typedef T* pointer;
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typedef const T* const_pointer;
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typedef T& reference;
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typedef const T& const_reference;
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typedef T value_type;
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template<class U>
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struct rebind
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{
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typedef aligned_allocator_indirection<U> other;
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};
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aligned_allocator_indirection() {}
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aligned_allocator_indirection(const aligned_allocator_indirection& ) : EIGEN_ALIGNED_ALLOCATOR<T>() {}
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aligned_allocator_indirection(const EIGEN_ALIGNED_ALLOCATOR<T>& ) {}
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template<class U>
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aligned_allocator_indirection(const aligned_allocator_indirection<U>& ) {}
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template<class U>
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aligned_allocator_indirection(const EIGEN_ALIGNED_ALLOCATOR<U>& ) {}
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~aligned_allocator_indirection() {}
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};
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#ifdef _MSC_VER
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// sometimes, MSVC detects, at compile time, that the argument x
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// in std::vector::resize(size_t s,T x) won't be aligned and generate an error
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// even if this function is never called. Whence this little wrapper.
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#define EIGEN_WORKAROUND_MSVC_STL_SUPPORT(T) \
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typename Eigen::internal::conditional< \
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Eigen::internal::is_arithmetic<T>::value, \
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T, \
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Eigen::internal::workaround_msvc_stl_support<T> \
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>::type
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namespace internal {
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template<typename T> struct workaround_msvc_stl_support : public T
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{
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inline workaround_msvc_stl_support() : T() {}
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inline workaround_msvc_stl_support(const T& other) : T(other) {}
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inline operator T& () { return *static_cast<T*>(this); }
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inline operator const T& () const { return *static_cast<const T*>(this); }
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template<typename OtherT>
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inline T& operator=(const OtherT& other)
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{ T::operator=(other); return *this; }
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inline workaround_msvc_stl_support& operator=(const workaround_msvc_stl_support& other)
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{ T::operator=(other); return *this; }
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};
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}
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#else
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#define EIGEN_WORKAROUND_MSVC_STL_SUPPORT(T) T
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#endif
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}
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#endif // EIGEN_STL_DETAILS_H
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