Helper class type that simplifies the usage of the MatrixOpGetGMS interface for clients. More...

#include <AbstractLinAlgPack_MatrixOpGetGMS.hpp>

Public Member Functions
	MatrixDenseEncap (const MatrixOpGetGMS &mat_get)
	Construct a `DMatrixSlice` view from a `MatrixOpGetGMS` object. More...

	MatrixDenseEncap (const MatrixOp &mat)
	Construct a `DMatrixSlice` view from a `MatrixOp` object. More...

	~MatrixDenseEncap ()
	Frees the `DMatrixSlice` view. More...

const DMatrixSlice	operator() () const
	Returns a constant view of the `DMatrixSlice` view. More...

Detailed Description

Helper class type that simplifies the usage of the MatrixOpGetGMS interface for clients.

This takes care of worrying about if the MatrixOpGetGMS interface is supported or not and remembering to free the DMatrixSlice view properly.

This class is only to be used on the stack as an automatic variable. For example, to extract a DMatrixSlice view of an abstract vector and use it to copy to a DMatrix object you could write a function like:

void copy(const MatrixOpGetGMS& mat_in, GenMatrixClass* gms_out ) {
    MatrixDenseEncap  gms_in(mat_in);
   gms_out = gms_in();
}

In the above code, if the underlying MatrixOpGetGMS object does not have to perform any dynamic memory allocations and copy in the method MatrixOpGetGMS::get_gms_view() then the above code will only have a constant time overhead.

Definition at line 125 of file AbstractLinAlgPack_MatrixOpGetGMS.hpp.