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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2009 Gael Guennebaud <gael.guennebaud@inria.fr>
// Copyright (C) 2009 Hauke Heibel <hauke.heibel@googlemail.com>
//
// 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_DETAILS_H
#define EIGEN_STL_DETAILS_H
#ifndef EIGEN_ALIGNED_ALLOCATOR
#define EIGEN_ALIGNED_ALLOCATOR Eigen::aligned_allocator
#endif
namespace Eigen {
// This one is needed to prevent reimplementing the whole std::vector.
template <class T>
class aligned_allocator_indirection : public EIGEN_ALIGNED_ALLOCATOR<T>
{
public:
typedef std::size_t size_type;
typedef std::ptrdiff_t difference_type;
typedef T* pointer;
typedef const T* const_pointer;
typedef T& reference;
typedef const T& const_reference;
typedef T value_type;
template<class U>
struct rebind
{
typedef aligned_allocator_indirection<U> other;
};
aligned_allocator_indirection() {}
aligned_allocator_indirection(const aligned_allocator_indirection& ) : EIGEN_ALIGNED_ALLOCATOR<T>() {}
aligned_allocator_indirection(const EIGEN_ALIGNED_ALLOCATOR<T>& ) {}
template<class U>
aligned_allocator_indirection(const aligned_allocator_indirection<U>& ) {}
template<class U>
aligned_allocator_indirection(const EIGEN_ALIGNED_ALLOCATOR<U>& ) {}
~aligned_allocator_indirection() {}
};
#if EIGEN_COMP_MSVC
// sometimes, MSVC detects, at compile time, that the argument x
// in std::vector::resize(size_t s,T x) won't be aligned and generate an error
// even if this function is never called. Whence this little wrapper.
#define EIGEN_WORKAROUND_MSVC_STL_SUPPORT(T) \
typename Eigen::internal::conditional< \
Eigen::internal::is_arithmetic<T>::value, \
T, \
Eigen::internal::workaround_msvc_stl_support<T> \
>::type
namespace internal {
template<typename T> struct workaround_msvc_stl_support : public T
{
inline workaround_msvc_stl_support() : T() {}
inline workaround_msvc_stl_support(const T& other) : T(other) {}
inline operator T& () { return *static_cast<T*>(this); }
inline operator const T& () const { return *static_cast<const T*>(this); }
template<typename OtherT>
inline T& operator=(const OtherT& other)
{ T::operator=(other); return *this; }
inline workaround_msvc_stl_support& operator=(const workaround_msvc_stl_support& other)
{ T::operator=(other); return *this; }
};
}
#else
#define EIGEN_WORKAROUND_MSVC_STL_SUPPORT(T) T
#endif
}
#endif // EIGEN_STL_DETAILS_H
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