devtools/eigen
1
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2026-04-10 11:34:33 +08:00
Code Issues Packages Projects Releases Wiki Activity

bug #54 - The big Map const-correctness changes

Browse Source
This commit is contained in:
Benoit Jacob
2010-12-10 02:09:58 -05:00
parent e736df3edd
commit 74cc42b22f
19 changed files with 311 additions and 113 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
Eigen/src/Core/util/Constants.h
View File

@@ -128,8 +128,10 @@ const unsigned int LinearAccessBit = 0x10;
* Means the expression has a coeffRef() method, i.e. is writable as its individual coefficients are directly addressable.
* This rules out read-only expressions.
*
* Note that DirectAccessBit implies LvalueBit, but the converse is false: LvalueBit doesn't imply DirectAccessBit because
* DirectAccessBit means that the whole memory layout is a plain strided array.
* Note that DirectAccessBit and LvalueBit are mutually orthogonal, as there are examples of expression having one but note
* the other:
* \li writable expressions that don't have a very simple memory layout as a strided array, have LvalueBit but not DirectAccessBit
* \li Map-to-const expressions, for example Map<const Matrix>, have DirectAccessBit but not LvalueBit
*
* Expressions having LvalueBit also have their coeff() method returning a const reference instead of returning a new value.
*/
@@ -137,14 +139,12 @@ const unsigned int LvalueBit = 0x20;
/** \ingroup flags
*
* Means that the underlying array of coefficients can be directly accessed. This means two things.
*
* First, this means LvalueBit, i.e. this means that the expression has a coeffRef() method, i.e. is writable as its
* individual coefficients are directly addressable. This rules out read-only expressions.
*
* Second, the memory layout of the array of coefficients must be exactly the natural one suggested by rows(), cols(),
* Means that the underlying array of coefficients can be directly accessed as a plain strided array. The memory layout
* of the array of coefficients must be exactly the natural one suggested by rows(), cols(),
* outerStride(), innerStride(), and the RowMajorBit. This rules out expressions such as Diagonal, whose coefficients,
* though referencable, do not have such a regular memory layout.
*
* See the comment on LvalueBit for an explanation of how LvalueBit and DirectAccessBit are mutually orthogonal.
*/
const unsigned int DirectAccessBit = 0x40;
@@ -242,7 +242,7 @@ enum {
};
enum AccessorLevels {
ReadOnlyAccessors, WriteAccessors, DirectAccessors
ReadOnlyAccessors, WriteAccessors, DirectAccessors, DirectWriteAccessors
};
enum DecompositionOptions {