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VectorBlock< VectorType, Size > Class Template Reference


Detailed Description

template<typename VectorType, int Size>
class VectorBlock< VectorType, Size >

Expression of a fixed-size or dynamic-size sub-vector.

Parameters:
VectorTypethe type of the object in which we are taking a sub-vector
Sizesize of the sub-vector we are taking at compile time (optional)

This class represents an expression of either a fixed-size or dynamic-size sub-vector. It is the return type of DenseBase::segment(Index,Index) and DenseBase::segment<int>(Index) and most of the time this is the only way it is used.

However, if you want to directly maniputate sub-vector expressions, for instance if you want to write a function returning such an expression, you will need to use this class.

Here is an example illustrating the dynamic case:

Output:

Note:
Even though this expression has dynamic size, in the case where VectorType has fixed size, this expression inherits a fixed maximal size which means that evaluating it does not cause a dynamic memory allocation.

Here is an example illustrating the fixed-size case:

Output:

See also:
class Block, DenseBase::segment(Index,Index,Index,Index), DenseBase::segment(Index,Index)

Definition at line 70 of file Core/VectorBlock.h.

#include <src/Core/VectorBlock.h>

Inheritance diagram for VectorBlock< VectorType, Size >:
Inheritance graph
[legend]

List of all members.

Public Member Functions

 VectorBlock (VectorType &vector, Index start, Index size)
 Dynamic-size constructor.
 VectorBlock (VectorType &vector, Index start)
 Fixed-size constructor.

Private Types

enum  { IsColVector = !(internal::traits<VectorType>::Flags & RowMajorBit) }
typedef Block< VectorType,
internal::traits< VectorType >
::Flags &RowMajorBit?1:Size,
internal::traits< VectorType >
::Flags &RowMajorBit?Size:1 > 
Base

Member Typedef Documentation

template<typename VectorType, int Size>
typedef Block<VectorType, internal::traits<VectorType>::Flags & RowMajorBit ? 1 : Size, internal::traits<VectorType>::Flags & RowMajorBit ? Size : 1> VectorBlock< VectorType, Size >::Base [private]

Member Enumeration Documentation

template<typename VectorType, int Size>
anonymous enum [private]
Enumerator:
IsColVector 

Definition at line 78 of file Core/VectorBlock.h.


Constructor & Destructor Documentation

template<typename VectorType, int Size>
VectorBlock< VectorType, Size >::VectorBlock ( VectorType &  vector,
Index  start,
Index  size 
) [inline]

Dynamic-size constructor.

Definition at line 88 of file Core/VectorBlock.h.

References EIGEN_STATIC_ASSERT_VECTOR_ONLY.

template<typename VectorType, int Size>
VectorBlock< VectorType, Size >::VectorBlock ( VectorType &  vector,
Index  start 
) [inline]

Fixed-size constructor.

Definition at line 98 of file Core/VectorBlock.h.

References EIGEN_STATIC_ASSERT_VECTOR_ONLY.




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