Содержит ли адаптер Xtensor std :: векторный собственный копия данных? ⇐ C++

[Anonymous]

I was trying to build an image class where the data points are stored in a std::vector (easier for interacting with other data and files) and an xtensor adaptor provides multidimensional access (and, hopefully, later also lads of mathematical goodies).
The image object is initialised with a vector of size 1, a shape vector {1} and a strides vector of {1} . Затем, когда я загружаю вектор точек, который больше, он изменяет размер вектор данных, копирует значения и устанавливает новую форму адаптера Xtensor. < /P>
Это код, я использую G ++ 14.2 на машине Ubunt

Код: Выделить всё

// compile with
//      g++ -I../../xtensor-stack test-xtensor3.cpp -o test-xtensor3
// from directory test-xtensor
//
// this should be the directory structure from the parent dir:
// .
// ├── bis
// │   └── test-xtensor
// └── xtensor-stack
//     ├── xframe
//     ├── xsimd
//     ├── xsimd-algorithm
//     ├── xtensor
//     ├── xtensor-blas
//     ├── xtensor-fftw
//     ├── xtensor-io
//     ├── xtensor-python
//     ├── xtensor-r
//     ├── xtensor-signal
//     ├── xtensor-sparse
//     └── xtl

#include 
#include 
#include 
#include 
#include 
#include 

template 
class bisimage {                    // image with a data buffer and xtensor access

public:
using self        =    bisimage;      // always good to know your type
using buffer_type = std::vector;      // type of the underlying buffer of data points

// Ensuring that strides and shape types match the expected types for xtensor
using shape_type = std::vector;      // std::size_t is typically used for shape
using strides_type = std::vector; // std::ptrdiff_t                for strides

protected:
buffer_type _datavec     = { 0 }; // data buffer
shape_type   datashape   = { 1 }; // shape for initialisation
strides_type datastrides = { 1 }; // strides for initialisation

public:
using data_type = xt::xarray_adaptor;
data_type data;                   // this is what the data looks like to the outside world

bisimage()
: data( _datavec, datashape, datastrides ) {}   // default constructor: 1 data point, shape and strides as expected

void data_info () {
std::cout 

Подробнее здесь: [url]https://stackoverflow.com/questions/79471185/does-an-xtensor-adaptor-of-a-stdvector-store-its-own-copy-of-the-data[/url]