Blaze 3.9
blaze::RowTrait< MT, CRAs > Struct Template Reference

Base template for the RowTrait class. More...

#include <RowTrait.h>

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

Detailed Description

template<typename MT, size_t... CRAs>
struct blaze::RowTrait< MT, CRAs >

Base template for the RowTrait class.

General

The RowTrait class template offers the possibility to select the resulting data type when creating a view on a specific row of a dense or sparse matrix. In case the given type MT is a dense or sparse matrix type, RowTrait defines the nested type Type, which represents the resulting data type of the row 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, RowTrait supports all matrix types of the Blaze library (including views and adaptors). For all other data types it is possible to specialize the RowTrait template. The following example shows the according specialization for the DynamicMatrix class template:

template< typename T1, bool SO, size_t... CRAs >
struct RowTrait< DynamicMatrix<T1,SO>, CRAs... >
{
using Type = DynamicVector<T1,true>;
};


Examples

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

// Definition of the row type of a row-major dynamic matrix
using ResultType1 = typename blaze::RowTrait<MatrixType1>::Type;
// Definition of the row type for the 1st row of a column-major static matrix
using ResultType2 = typename blaze::RowTrait<MatrixType2,1UL>::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 RowTrait class.
Definition: RowTrait.h:125

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