Blaze 3.9
blaze::DeclStrLowTrait< MT > Struct Template Reference

Base template for the DeclStrLowTrait class. More...

#include <DeclStrLowTrait.h>

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

Detailed Description

template<typename MT>
struct blaze::DeclStrLowTrait< MT >

Base template for the DeclStrLowTrait class.

General

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

template< typename MT, bool SO, bool DF, bool SF >
struct DeclStrLowTrait< SymmetricMatrix<MT,SO,DF,SF> >
{
using Type = IdentityMatrix<ElementType_t<MT>,SO>;
};


Examples

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

// Definition of the resulting type of a row-major dynamic matrix
using MatrixType1 = DynamicMatrix<int,rowMajor>;
using DeclStrLowType1 = typename DeclStrLowTrait<MatrixType1>::Type;
// Definition of the resulting type of a symmetric column-major static matrix
using MatrixType2 = SymmetricMatrix< StaticMatrix<int,3UL,3UL,columnMajor> >;
using DeclStrLowType2 = typename DeclStrLowTrait<MatrixType2>::Type;
Efficient implementation of a dynamic matrix.
Definition: DynamicMatrix.h:242
Efficient implementation of a fixed-sized matrix.
Definition: StaticMatrix.h:249
Matrix adapter for symmetric matrices.
Definition: BaseTemplate.h:614
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 DeclStrLowTrait class.
Definition: DeclStrLowTrait.h:128

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