Blaze 3.9
blaze::RowsTrait< MT, M > Struct Template Reference

Base template for the RowsTrait class. More...

#include <RowsTrait.h>

Inherits decltype evalRowsTrait std::declval< MT & >.

Detailed Description

template<typename MT, size_t M>
struct blaze::RowsTrait< MT, M >

Base template for the RowsTrait class.

General

The RowsTrait class template offers the possibility to select the resulting data type when creating a view on a set of rows of a dense or sparse matrix. In case the given type MT is a dense or sparse matrix type, RowsTrait defines the nested type Type, which represents the resulting data type of the rows operation. Otherwise there is no nested type Type. Note that const and volatile qualifiers and reference modifiers are generally ignored.

Creating custom specializations

Per default, RowsTrait supports all matrix types of the Blaze library (including views and adaptors). For all other data types it is possible to specialize the RowsTrait template. The following example shows the according specialization for the DynamicMatrix class template:

template< typename T1, bool SO, size_t M >
struct RowsTrait< DynamicMatrix<T1,SO>, M >
{
using Type = DynamicMatrix<T1,false>;
};


Examples

The following example demonstrates the use of the RowsTrait template, where depending on the given matrix type the resulting rows type is selected:

// Definition of the rows type of a row-major dynamic matrix
using ResultType1 = typename blaze::RowsTrait<MatrixType1,0UL>::Type;
// Definition of the rows type for two rows of a column-major static matrix
using ResultType2 = typename blaze::RowsTrait<MatrixType2,2UL>::Type;
Efficient implementation of a dynamic matrix.
Definition: DynamicMatrix.h:242
Efficient implementation of a fixed-sized matrix.
Definition: StaticMatrix.h:249
constexpr bool rowMajor
Storage order flag for row-major matrices.
Definition: StorageOrder.h:71
constexpr bool columnMajor
Storage order flag for column-major matrices.
Definition: StorageOrder.h:99
Base template for the RowsTrait class.
Definition: RowsTrait.h:121

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