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source: branches/HeuristicLab.Problems.GaussianProcessTuning/HeuristicLab.Eigen/Eigen/src/SparseCore/CoreIterators.h @ 9562

Last change on this file since 9562 was 9562, checked in by gkronber, 11 years ago

#1967 worked on Gaussian process evolution.

File size: 1.9 KB
Line 
1// This file is part of Eigen, a lightweight C++ template library
2// for linear algebra.
3//
4// Copyright (C) 2008-2010 Gael Guennebaud <gael.guennebaud@inria.fr>
5//
6// This Source Code Form is subject to the terms of the Mozilla
7// Public License v. 2.0. If a copy of the MPL was not distributed
8// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
9
10#ifndef EIGEN_COREITERATORS_H
11#define EIGEN_COREITERATORS_H
12
13namespace Eigen {
14
15/* This file contains the respective InnerIterator definition of the expressions defined in Eigen/Core
16 */
17
18/** \ingroup SparseCore_Module
19  * \class InnerIterator
20  * \brief An InnerIterator allows to loop over the element of a sparse (or dense) matrix or expression
21  *
22  * todo
23  */
24
25// generic version for dense matrix and expressions
26template<typename Derived> class DenseBase<Derived>::InnerIterator
27{
28  protected:
29    typedef typename Derived::Scalar Scalar;
30    typedef typename Derived::Index Index;
31
32    enum { IsRowMajor = (Derived::Flags&RowMajorBit)==RowMajorBit };
33  public:
34    EIGEN_STRONG_INLINE InnerIterator(const Derived& expr, Index outer)
35      : m_expression(expr), m_inner(0), m_outer(outer), m_end(expr.innerSize())
36    {}
37
38    EIGEN_STRONG_INLINE Scalar value() const
39    {
40      return (IsRowMajor) ? m_expression.coeff(m_outer, m_inner)
41                          : m_expression.coeff(m_inner, m_outer);
42    }
43
44    EIGEN_STRONG_INLINE InnerIterator& operator++() { m_inner++; return *this; }
45
46    EIGEN_STRONG_INLINE Index index() const { return m_inner; }
47    inline Index row() const { return IsRowMajor ? m_outer : index(); }
48    inline Index col() const { return IsRowMajor ? index() : m_outer; }
49
50    EIGEN_STRONG_INLINE operator bool() const { return m_inner < m_end && m_inner>=0; }
51
52  protected:
53    const Derived& m_expression;
54    Index m_inner;
55    const Index m_outer;
56    const Index m_end;
57};
58
59} // end namespace Eigen
60
61#endif // EIGEN_COREITERATORS_H
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