xtensor

Defined in xtensor/xtensor.hpp

template <class EC, size_t N, layout_type L>

class xt::xtensor_container

Dense multidimensional container with tensor semantic and fixed dimension.

The xtensor_container class implements a dense multidimensional container with tensor semantic and fixed dimension

See

xtensor

Template Parameters

• EC: The type of the container holding the elements.
• N: The dimension of the container.
• L: The layout_type of the tensor.

Inherits from xt::xstrided_container< xtensor_container< EC, N, L >, L >, xt::xcontainer_semantic< xtensor_container< EC, N, L > >

Constructors

xtensor_container()

Allocates an uninitialized xtensor_container that holds 0 element.

xtensor_container(nested_initializer_list_t<value_type, N> t)

Allocates an xtensor_container with nested initializer lists.

xtensor_container(const shape_type &shape, layout_type l = L)

Allocates an uninitialized xtensor_container with the specified shape and layout_type.

Parameters

• shape: the shape of the xtensor_container
• l: the layout_type of the xtensor_container

xtensor_container(const shape_type &shape, const_reference value, layout_type l = L)

Allocates an xtensor_container with the specified shape and layout_type.

Elements are initialized to the specified value.

Parameters

• shape: the shape of the xtensor_container
• value: the value of the elements
• l: the layout_type of the xtensor_container

xtensor_container(const shape_type &shape, const strides_type &strides)

Allocates an uninitialized xtensor_container with the specified shape and strides.

Parameters

• shape: the shape of the xtensor_container
• strides: the strides of the xtensor_container

xtensor_container(const shape_type &shape, const strides_type &strides, const_reference value)

Allocates an uninitialized xtensor_container with the specified shape and strides.

Elements are initialized to the specified value.

Parameters

• shape: the shape of the xtensor_container
• strides: the strides of the xtensor_container
• value: the value of the elements

xtensor_container(container_type &&data, inner_shape_type &&shape, inner_strides_type &&strides)

Allocates an xtensor_container by moving specified data, shape and strides.

Parameters

• data: the data for the xtensor_container
• shape: the shape of the xtensor_container
• strides: the strides of the xtensor_container

Extended copy semantic

template <class E>

xtensor_container(const xexpression<E> &e)

The extended copy constructor.

template <class E>

auto operator=(const xexpression<E> &e)

The extended assignment operator.

typedef xt::xtensor

Alias template on xtensor_container with default parameters for data container type.

This allows to write

xt::xtensor<double, 2> a = {{1., 2.}, {3., 4.}};

instead of the heavier syntax

xt::xtensor_container<std::vector<double>, 2> a = ...

Template Parameters

• T: The value type of the elements.
• N: The dimension of the tensor.
• L: The layout_type of the tensor (default: row_major).
• A: The allocator of the containers holding the elements.