Eigen::internal::conservative_resize_like_impl< Derived, OtherDerived, IsVector > Struct Template Reference

#include <PlainObjectBase.h>

Inheritance diagram for Eigen::internal::conservative_resize_like_impl< Derived, OtherDerived, IsVector >:

List of all members.

Static Public Member Functions
static void	run (DenseBase< Derived > &_this, Index rows, Index cols)
static void	run (DenseBase< Derived > &_this, const DenseBase< OtherDerived > &other)

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Detailed Description

template<typename Derived, typename OtherDerived, bool IsVector>
struct Eigen::internal::conservative_resize_like_impl< Derived, OtherDerived, IsVector >

Definition at line 881 of file PlainObjectBase.h.

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Member Function Documentation

template<typename Derived, typename OtherDerived, bool IsVector>

static void Eigen::internal::conservative_resize_like_impl< Derived, OtherDerived, IsVector >::run	(	DenseBase< Derived > &	_this,
		Index	rows,
		Index	cols
	)		[inline, static]

Definition at line 883 of file PlainObjectBase.h.

  {
    if (_this.rows() == rows && _this.cols() == cols) return;
    EIGEN_STATIC_ASSERT_DYNAMIC_SIZE(Derived)

    if ( ( Derived::IsRowMajor && _this.cols() == cols) || // row-major and we change only the number of rows
         (!Derived::IsRowMajor && _this.rows() == rows) )  // column-major and we change only the number of columns
    {
      internal::check_rows_cols_for_overflow<Derived::MaxSizeAtCompileTime>::run(rows, cols);
      _this.derived().m_storage.conservativeResize(rows*cols,rows,cols);
    }
    else
    {
      // The storage order does not allow us to use reallocation.
      typename Derived::PlainObject tmp(rows,cols);
      const Index common_rows = (std::min)(rows, _this.rows());
      const Index common_cols = (std::min)(cols, _this.cols());
      tmp.block(0,0,common_rows,common_cols) = _this.block(0,0,common_rows,common_cols);
      _this.derived().swap(tmp);
    }
  }

template<typename Derived, typename OtherDerived, bool IsVector>

static void Eigen::internal::conservative_resize_like_impl< Derived, OtherDerived, IsVector >::run	(	DenseBase< Derived > &	_this,
		const DenseBase< OtherDerived > &	other
	)		[inline, static]

Reimplemented in Eigen::internal::conservative_resize_like_impl< Derived, OtherDerived, true >.

Definition at line 905 of file PlainObjectBase.h.

  {
    if (_this.rows() == other.rows() && _this.cols() == other.cols()) return;

    // Note: Here is space for improvement. Basically, for conservativeResize(Index,Index),
    // neither RowsAtCompileTime or ColsAtCompileTime must be Dynamic. If only one of the
    // dimensions is dynamic, one could use either conservativeResize(Index rows, NoChange_t) or
    // conservativeResize(NoChange_t, Index cols). For these methods new static asserts like
    // EIGEN_STATIC_ASSERT_DYNAMIC_ROWS and EIGEN_STATIC_ASSERT_DYNAMIC_COLS would be good.
    EIGEN_STATIC_ASSERT_DYNAMIC_SIZE(Derived)
    EIGEN_STATIC_ASSERT_DYNAMIC_SIZE(OtherDerived)

    if ( ( Derived::IsRowMajor && _this.cols() == other.cols()) || // row-major and we change only the number of rows
         (!Derived::IsRowMajor && _this.rows() == other.rows()) )  // column-major and we change only the number of columns
    {
      const Index new_rows = other.rows() - _this.rows();
      const Index new_cols = other.cols() - _this.cols();
      _this.derived().m_storage.conservativeResize(other.size(),other.rows(),other.cols());
      if (new_rows>0)
        _this.bottomRightCorner(new_rows, other.cols()) = other.bottomRows(new_rows);
      else if (new_cols>0)
        _this.bottomRightCorner(other.rows(), new_cols) = other.rightCols(new_cols);
    }
    else
    {
      // The storage order does not allow us to use reallocation.
      typename Derived::PlainObject tmp(other);
      const Index common_rows = (std::min)(tmp.rows(), _this.rows());
      const Index common_cols = (std::min)(tmp.cols(), _this.cols());
      tmp.block(0,0,common_rows,common_cols) = _this.block(0,0,common_rows,common_cols);
      _this.derived().swap(tmp);
    }
  }

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The documentation for this struct was generated from the following file:

• PlainObjectBase.h