Inheritance diagram for xtd::span< type_t, extent >:

Definition

template<class type_t, xtd::size extent = dynamic_extent>
class xtd::span< type_t, extent >

Represents a non-owning view over a contiguous sequence of objects.

Definition: template<class type_t, xtd::size extent = dynamic_extent>

class span : public xtd::object, public xtd::iequatable<xtd::span<type_t, extent>>;

xtd::iequatable
Defines a generalized method that a value type or class implements to create a type-specific method f...
Definition iequatable.hpp:22

xtd::object
Supports all classes in the xtd class hierarchy and provides low-level services to derived classes....
Definition object.hpp:44

xtd::span
Represents a non-owning view over a contiguous sequence of objects.
Definition span.hpp:58

Header: #include <xtd/span>

Namespace: xtd

Library: xtd.core

Remarks: The class template xtd::span describes an object that can refer to a contiguous sequence of objects with the first element of the sequence at position zero. A span can either have a static extent, in which case the number of elements in the sequence is known at compile-time and encoded in the type, or a dynamic extent.; The referenced data can be modified through a xtd::span object. To prevent this, construct a xtd::span over a const type_t:
int numbers[] = {0, 1, 2};

span<int> span_numbers = numbers;

span_numbers[0] = 42; // numbers == {42, 1, 2};

span<const int> cspan_numbers = numbers;

cspan_numbers[0] = 0; // ERROR: cspan_numbers[0] is read-only

Examples: Create a span from memory.
#include <xtd/console>

#include <xtd/span>

using namespace xtd;

auto main() -> int {

// Create a span from memory.

auto memory_pointer = new byte[100];

auto memory_span = span(memory_pointer, 100);

auto data = byte {};

for (auto ctr = 0_z; ctr < memory_span.length(); ++ctr)

memory_span[ctr] = data++;

auto array_sum = 0;

for (auto value : memory_span)

array_sum += value;

console::write_line("The sum is {}", array_sum);

// Don't forget to free memory pointer allocation as xtd::span does not manage memory.

delete[] memory_pointer;

}

// This code produces the following output :

//

// The sum is 4950

xtd::console::write_line
static void write_line()
Writes the current line terminator to the standard output stream using the specified format informati...

xtd::span::data
constexpr const_pointer data() const noexcept
Gets direct access to the underlying contiguous storage.
Definition span.hpp:222

xtd::span::span
constexpr span()
Creates an empty xtd::span whose xtd::span::data is null and xtd::span::size is 0.
Definition span.hpp:94

xtd
The xtd namespace contains all fundamental classes to access Hardware, Os, System,...
Definition xtd_about_box.hpp:10

Create a span over an array.

#include <xtd/array>
#include <xtd/console>
#include <xtd/span>
 
using namespace xtd;
 
auto main() -> int {
  // Create a span over an array.
  auto bytes = array<byte>(100);
  auto array_span = span(bytes);
  
  auto data = byte {};
  for (auto ctr = 0_z; ctr < array_span.length(); ++ctr)
    array_span[ctr] = data++;
  
  auto array_sum = 0;
  for (auto value : bytes)
    array_sum += value;
  
  console::write_line("The sum is {}", array_sum);
}
 
// This code produces the following output :
//
// The sum is 4950

Public Aliases
using	element_type = type_t
	Represents the span elemeent type.

using	value_type = std::remove_cv_t< type_t >
	Represents the span value type.

using	size_type = xtd::size
	Represents the span size type (usually xtd::size).

using	difference_type = xtd::ptrdiff
	Represents the span difference type (usually xtd::ptrdiff).

using	pointer = type_t *
	Represents the span pointer type.

using	const_pointer = const type_t *
	Represents the span const pointer type.

using	reference = type_t &
	Represents the span reference type.

using	const_reference = const type_t &
	Represents the span const reference type.

using	iterator = xtd::collections::generic::helpers::wrap_pointer_iterator< pointer >
	Represents the iterator of span value type.

using	const_iterator = const xtd::collections::generic::helpers::wrap_pointer_iterator< pointer >
	Represents the const iterator of span value type.

using	reverse_iterator = std::reverse_iterator< xtd::collections::generic::helpers::wrap_pointer_iterator< pointer > >
	Represents the reverse iterator of span value type.

using	const_reverse_iterator = const std::reverse_iterator< xtd::collections::generic::helpers::wrap_pointer_iterator< pointer > >
	Represents the const reverse iterator of span value type.

Public Properties
static const span	empty_span
	Returns an empty xtd::span <type_t> object.

const_reference	back () const
	Gets the last element.

const_iterator	begin () const
	Returns an iterator to the beginning.

iterator	begin ()
	Returns an iterator to the beginning.

const_iterator	cbegin () const
	Returns an iterator to the beginning.

const_iterator	cend () const
	Returns an iterator to the end.

const_reverse_iterator	crbegin () const
	Returns a reverse iterator to the beginning.

const_reverse_iterator	crend () const
	Returns a reverse iterator to the end.

constexpr const_pointer	data () const noexcept
	Gets direct access to the underlying contiguous storage.

constexpr bool	empty () const noexcept
	Returns a value that indicates whether the current xtd::span <type_t> is empty.

const_iterator	end () const
	Returns an iterator to the end.

iterator	end ()
	Returns an iterator to the end.

const_reference	front () const
	Gets the first element.

constexpr bool	is_empty () const noexcept
	Returns a value that indicates whether the current xtd::span <type_t> is empty.

constexpr size_type	length () const noexcept
	Returns the length of the current span.

const_reverse_iterator	rbegin () const
	Returns a reverse iterator to the beginning.

reverse_iterator	rbegin ()
	Returns a reverse iterator to the beginning.

const_reverse_iterator	rend () const
	Returns a reverse iterator to the end.

reverse_iterator	rend ()
	Returns a reverse iterator to the end.

constexpr size_type	size () const noexcept
	Returns the number of elements.

constexpr size_type	size_bytes () const noexcept
	Returns the size of the sequence in bytes.

Public Constructors
template<xtd::size count = 0>
constexpr	span ()
	Creates an empty xtd::span whose xtd::span::data is null and xtd::span::size is 0.

template<class iterator_t >
constexpr	span (iterator_t first, iterator_t last)
	Creates an xtd::span with specified iterators.

template<xtd::size len>
constexpr	span (element_type(&array)[len]) noexcept
	Creates an xtd::span with specified native array.

template<class array_type_t , xtd::size len>
constexpr	span (const std::array< array_type_t, len > &array) noexcept
	Creates an xtd::span with specified std::array.

template<class array_type_t , xtd::size len>
constexpr	span (std::array< array_type_t, len > &array) noexcept
	Creates an xtd::span with specified std::array.

template<class range_t >
constexpr	span (range_t &&range) noexcept
	Creates an xtd::span with specified range.

constexpr	span (std::initializer_list< type_t > items) noexcept
	Creates an xtd::span with specified initializer list.

template<class collection_t >
constexpr	span (collection_t &items, size_type length)
	Creates an xtd::span with specified collection and count.

template<class collection_t >
constexpr	span (collection_t &items, size_type start, size_type length)
	Creates an xtd::span with specified collection, offest and count.

constexpr	span (type_t *const data, size_type length)
	Creates an xtd::span with specified data pointer and count.

Public Methods
const_reference	at (size_type pos) const
	Gets the specified element with bounds checking.

reference	at (size_type pos)
	Gets the specified element with bounds checking.

void	clear () noexcept
	Clears the contents of this xtd::span <type> object.

template<xtd::size length>
void	copy_to (span< type_t, length > &destination) const
	Copies the contents of this xtd::span <type_t> into a destination xtd:span <type_t>.

bool	equals (const object &obj) const noexcept override
	Determines whether the specified object is equal to the current object.

bool	equals (const span &rhs) const noexcept override
	Indicates whether the current object is equal to another object of the same type.

void	fill (const type_t &value)
	Fills the elements of this span with a specified value.

template<xtd::size count>
span< type_t, count >	first () const
	Obtains a subspan consisting of the first `count` elements of the sequence.

span< type_t >	first (xtd::size count) const
	Obtains a subspan consisting of the first `count` elements of the sequence.

xtd::size	get_hash_code () const noexcept override
	Serves as a hash function for a particular type.

template<xtd::size count>
span< type_t, count >	last () const
	Obtains a subspan consisting of the last N elements of the sequence.

span< type_t >	last (xtd::size count) const
	Obtains a subspan consisting of the last N elements of the sequence.

template<xtd::size start, size_type lenght = xtd::dynamic_extent>
span< type_t >	slice () const
	Forms a slice out of the current span starting at a specified index for a specified length.

span< type_t >	slice (size_type start) const
	Forms a slice out of the current span that begins at a specified index.

span< type_t >	slice (size_type start, size_type length) const
	Forms a slice out of the current span starting at a specified index for a specified length.

template<xtd::size offset, size_type count = xtd::dynamic_extent>
span< type_t >	subspan () const
	Forms a subspan of the current span starting at a specified index for a specified length.

span< type_t >	subspan (size_type offset, size_type count=xtd::dynamic_extent) const
	Forms a subspan of the current span starting at a specified index for a specified length.

xtd::array< value_type >	to_array () const noexcept
	Copies the contents of this span into a new array.

string	to_string () const noexcept override
	Returns the string representation of this xtd::span <type_t> object.

template<xtd::size length>
bool	try_copy_to (span< type_t, length > &destination) const noexcept
	Attempts to copy the current xtd::span <type_t> to a destination xtd::span <type_t> and returns a value that indicates whether the copy operation succeeded.

Public Operators
const_reference	operator[] (size_type index) const
	Gets the element at the specified zero-based index.

reference	operator[] (size_type index)
	Gets the element at the specified zero-based index.

Additional Inherited Members
Public Member Functions inherited from xtd::object
	object ()=default
	Create a new instance of the ultimate base class object.

virtual type_object	get_type () const noexcept
	Gets the type of the current instance.

template<class object_t >
xtd::uptr< object_t >	memberwise_clone () const
	Creates a shallow copy of the current object.

Public Member Functions inherited from xtd::iequatable< type_t >
virtual bool	equals (const type_t &) const noexcept=0
	Indicates whether the current object is equal to another object of the same type.

Static Public Member Functions inherited from xtd::object
template<class object_a_t , class object_b_t >
static bool	equals (const object_a_t &object_a, const object_b_t &object_b) noexcept
	Determines whether the specified object instances are considered equal.

template<class object_a_t , class object_b_t >
static bool	reference_equals (const object_a_t &object_a, const object_b_t &object_b) noexcept
	Determines whether the specified object instances are the same instance.

Member Typedef Documentation

◆ element_type

template<class type_t , xtd::size extent = dynamic_extent>

using xtd::span< type_t, extent >::element_type = type_t

Represents the span elemeent type.

◆ value_type

template<class type_t , xtd::size extent = dynamic_extent>

using xtd::span< type_t, extent >::value_type = std::remove_cv_t<type_t>

Represents the span value type.

◆ size_type

template<class type_t , xtd::size extent = dynamic_extent>

using xtd::span< type_t, extent >::size_type = xtd::size

Represents the span size type (usually xtd::size).

◆ difference_type

template<class type_t , xtd::size extent = dynamic_extent>

using xtd::span< type_t, extent >::difference_type = xtd::ptrdiff

Represents the span difference type (usually xtd::ptrdiff).

◆ pointer

template<class type_t , xtd::size extent = dynamic_extent>

using xtd::span< type_t, extent >::pointer = type_t*

Represents the span pointer type.

◆ const_pointer

template<class type_t , xtd::size extent = dynamic_extent>

using xtd::span< type_t, extent >::const_pointer = const type_t*

Represents the span const pointer type.

◆ reference

template<class type_t , xtd::size extent = dynamic_extent>

using xtd::span< type_t, extent >::reference = type_t&

Represents the span reference type.

◆ const_reference

template<class type_t , xtd::size extent = dynamic_extent>

using xtd::span< type_t, extent >::const_reference = const type_t&

Represents the span const reference type.

◆ iterator

template<class type_t , xtd::size extent = dynamic_extent>

using xtd::span< type_t, extent >::iterator = xtd::collections::generic::helpers::wrap_pointer_iterator<pointer>

Represents the iterator of span value type.

◆ const_iterator

template<class type_t , xtd::size extent = dynamic_extent>

using xtd::span< type_t, extent >::const_iterator = const xtd::collections::generic::helpers::wrap_pointer_iterator<pointer>

Represents the const iterator of span value type.

◆ reverse_iterator

template<class type_t , xtd::size extent = dynamic_extent>

using xtd::span< type_t, extent >::reverse_iterator = std::reverse_iterator<xtd::collections::generic::helpers::wrap_pointer_iterator<pointer> >

Represents the reverse iterator of span value type.

◆ const_reverse_iterator

template<class type_t , xtd::size extent = dynamic_extent>

using xtd::span< type_t, extent >::const_reverse_iterator = const std::reverse_iterator<xtd::collections::generic::helpers::wrap_pointer_iterator<pointer> >

Represents the const reverse iterator of span value type.

Constructor & Destructor Documentation

◆ span() [1/10]

template<class type_t , xtd::size extent = dynamic_extent>

template<xtd::size count = 0>

constexpr xtd::span< type_t, extent >::span ( )

inlineconstexpr

Creates an empty xtd::span whose xtd::span::data is null and xtd::span::size is 0.

◆ span() [2/10]

template<class type_t , xtd::size extent = dynamic_extent>

template<class iterator_t >

constexpr xtd::span< type_t, extent >::span	(	iterator_t	first,
		iterator_t	last
	)

inlineconstexpr

Creates an xtd::span with specified iterators.

Parameters

first	The iterator to the first element of the sequence.
last	The iterator to the last element of the sequence.

◆ span() [3/10]

template<class type_t , xtd::size extent = dynamic_extent>

template<xtd::size len>

constexpr xtd::span< type_t, extent >::span ( element_type(&) array[len] )

inlineconstexprnoexcept

Creates an xtd::span with specified native array.

Parameters

array The native array to construct a view for.

◆ span() [4/10]

template<class type_t , xtd::size extent = dynamic_extent>

template<class array_type_t , xtd::size len>

constexpr xtd::span< type_t, extent >::span ( const std::array< array_type_t, len > & array )

inlineconstexprnoexcept

Creates an xtd::span with specified std::array.

Parameters

array The std::array to construct a view for.

◆ span() [5/10]

template<class type_t , xtd::size extent = dynamic_extent>

template<class array_type_t , xtd::size len>

constexpr xtd::span< type_t, extent >::span ( std::array< array_type_t, len > & array )

inlineconstexprnoexcept

Creates an xtd::span with specified std::array.

Parameters

array The std::array to construct a view for.

◆ span() [6/10]

template<class type_t , xtd::size extent = dynamic_extent>

template<class range_t >

constexpr xtd::span< type_t, extent >::span ( range_t && range )

inlineconstexprnoexcept

Creates an xtd::span with specified range.

Parameters

range The range to construct a view for.

◆ span() [7/10]

template<class type_t , xtd::size extent = dynamic_extent>

constexpr xtd::span< type_t, extent >::span ( std::initializer_list< type_t > items )

inlineconstexprnoexcept

Creates an xtd::span with specified initializer list.

Parameters

items The initializer list to construct a view for.

◆ span() [8/10]

template<class type_t , xtd::size extent = dynamic_extent>

template<class collection_t >

constexpr xtd::span< type_t, extent >::span	(	collection_t &	items,
		size_type	length
	)

inlineconstexpr

Creates an xtd::span with specified collection and count.

Parameters

items	The collection to construct a view for.
length	The number of elements in the collection.

Exceptions

xtd::argument_out_of_range_exception if length is greater than items size.

◆ span() [9/10]

template<class type_t , xtd::size extent = dynamic_extent>

template<class collection_t >

constexpr xtd::span< type_t, extent >::span	(	collection_t &	items,
		size_type	start,
		size_type	length
	)

inlineconstexpr

Creates an xtd::span with specified collection, offest and count.

Parameters

items	The collection to construct a view for.
start	The offset in the collection.
length	The number of elements in the collection.

Exceptions

xtd::argument_out_of_range_exception if start or start + length are greater than items size.

◆ span() [10/10]

template<class type_t , xtd::size extent = dynamic_extent>

constexpr xtd::span< type_t, extent >::span	(	type_t *const	data,
		size_type	length
	)

inlineconstexpr

Creates an xtd::span with specified data pointer and count.

Parameters

data	The data pointer to construct a view for.
length	The number of elements to constuct.

Member Function Documentation

◆ back()

template<class type_t , xtd::size extent = dynamic_extent>

const_reference xtd::span< type_t, extent >::back ( ) const

inline

Gets the last element.

Returns: The last element.

Exceptions

argument_out_of_range_exception if xtd::san i empty.

◆ begin() [1/2]

template<class type_t , xtd::size extent = dynamic_extent>

const_iterator xtd::span< type_t, extent >::begin ( ) const

inline

Returns an iterator to the beginning.

Returns: The iterator of the first element.

◆ begin() [2/2]

template<class type_t , xtd::size extent = dynamic_extent>

iterator xtd::span< type_t, extent >::begin ( )

inline

Returns an iterator to the beginning.

Returns: The iterator of the first element.

◆ cbegin()

template<class type_t , xtd::size extent = dynamic_extent>

const_iterator xtd::span< type_t, extent >::cbegin ( ) const

inline

Returns an iterator to the beginning.

Returns: The iterator of the first element.

◆ cend()

template<class type_t , xtd::size extent = dynamic_extent>

const_iterator xtd::span< type_t, extent >::cend ( ) const

inline

Returns an iterator to the end.

Returns: The iterator to the element following the last element.

◆ crbegin()

template<class type_t , xtd::size extent = dynamic_extent>

const_reverse_iterator xtd::span< type_t, extent >::crbegin ( ) const

inline

Returns a reverse iterator to the beginning.

Returns: The reverse iterator of the first element.

◆ crend()

template<class type_t , xtd::size extent = dynamic_extent>

const_reverse_iterator xtd::span< type_t, extent >::crend ( ) const

inline

Returns a reverse iterator to the end.

Returns: The reverse iterator to the element following the last element.

◆ data()

template<class type_t , xtd::size extent = dynamic_extent>

constexpr const_pointer xtd::span< type_t, extent >::data ( ) const

inlineconstexprnoexcept

Gets direct access to the underlying contiguous storage.

Returns: A pointer to the beginning of the sequence.

◆ empty()

template<class type_t , xtd::size extent = dynamic_extent>

constexpr bool xtd::span< type_t, extent >::empty ( ) const

inlineconstexprnoexcept

Returns a value that indicates whether the current xtd::span <type_t> is empty.

Returns: true if the current span is empty; otherwise, false.

◆ end() [1/2]

template<class type_t , xtd::size extent = dynamic_extent>

const_iterator xtd::span< type_t, extent >::end ( ) const

inline

Returns an iterator to the end.

Returns: The iterator to the element following the last element.

◆ end() [2/2]

template<class type_t , xtd::size extent = dynamic_extent>

iterator xtd::span< type_t, extent >::end ( )

inline

Returns an iterator to the end.

Returns: The iterator to the element following the last element.

◆ front()

template<class type_t , xtd::size extent = dynamic_extent>

const_reference xtd::span< type_t, extent >::front ( ) const

inline

Gets the first element.

Returns: The first element.

Exceptions

argument_out_of_range_exception if xtd::san i empty.

◆ is_empty()

template<class type_t , xtd::size extent = dynamic_extent>

constexpr bool xtd::span< type_t, extent >::is_empty ( ) const

inlineconstexprnoexcept

Returns a value that indicates whether the current xtd::span <type_t> is empty.

Returns: true if the current span is empty; otherwise, false.

◆ length()

template<class type_t , xtd::size extent = dynamic_extent>

constexpr size_type xtd::span< type_t, extent >::length ( ) const

inlineconstexprnoexcept

Returns the length of the current span.

Returns: The length of the current span.

◆ rbegin() [1/2]

template<class type_t , xtd::size extent = dynamic_extent>

const_reverse_iterator xtd::span< type_t, extent >::rbegin ( ) const

inline

Returns a reverse iterator to the beginning.

Returns: The reverse iterator of the first element.

◆ rbegin() [2/2]

template<class type_t , xtd::size extent = dynamic_extent>

reverse_iterator xtd::span< type_t, extent >::rbegin ( )

inline

Returns a reverse iterator to the beginning.

Returns: The reverse iterator of the first element.

◆ rend() [1/2]

template<class type_t , xtd::size extent = dynamic_extent>

const_reverse_iterator xtd::span< type_t, extent >::rend ( ) const

inline

Returns a reverse iterator to the end.

Returns: The reverse iterator to the element following the last element.

◆ rend() [2/2]

template<class type_t , xtd::size extent = dynamic_extent>

reverse_iterator xtd::span< type_t, extent >::rend ( )

inline

Returns a reverse iterator to the end.

Returns: The reverse iterator to the element following the last element.

◆ size()

template<class type_t , xtd::size extent = dynamic_extent>

constexpr size_type xtd::span< type_t, extent >::size ( ) const

inlineconstexprnoexcept

Returns the number of elements.

Returns: The number of elements in the span.

◆ size_bytes()

template<class type_t , xtd::size extent = dynamic_extent>

constexpr size_type xtd::span< type_t, extent >::size_bytes ( ) const

inlineconstexprnoexcept

Returns the size of the sequence in bytes.

Returns: The size of the sequence in bytes, i.e., size() * sizeof(element_type).

◆ at() [1/2]

template<class type_t , xtd::size extent = dynamic_extent>

const_reference xtd::span< type_t, extent >::at ( size_type pos ) const

inline

Gets the specified element with bounds checking.

Parameters

pos	The position of the element to return.

Returns: Reference to the requested element.

Exceptions

xtd::index_out_of_range_exception `index` is less than zero or greater than or equal to xtd::span::length.

◆ at() [2/2]

template<class type_t , xtd::size extent = dynamic_extent>

reference xtd::span< type_t, extent >::at ( size_type pos )

inline

Gets the specified element with bounds checking.

Parameters

pos	The position of the element to return.

Returns: Reference to the requested element.

Exceptions

xtd::argument_out_of_range_exceptionv if pos greather or equal than length.

◆ clear()

template<class type_t , xtd::size extent = dynamic_extent>

void xtd::span< type_t, extent >::clear ( )

inlinenoexcept

Clears the contents of this xtd::span <type> object.

Remarks: The xtd::span::clear method sets the items in the xtd::span <type_t> object to their default values. It does not remove items from the xtd::span <type_t>.

◆ copy_to()

template<class type_t , xtd::size extent = dynamic_extent>

template<xtd::size length>

void xtd::span< type_t, extent >::copy_to ( span< type_t, length > & destination ) const

inline

Copies the contents of this xtd::span <type_t> into a destination xtd:span <type_t>.

Parameters

destinaton The destination xtd::span <type_t> object.

Exceptions

xtd::argument_exception `destination` is shorter than the source xtd::span <type_t>.

◆ equals() [1/2]

template<class type_t , xtd::size extent = dynamic_extent>

bool xtd::span< type_t, extent >::equals ( const object & obj ) const

inlineoverridevirtualnoexcept

Determines whether the specified object is equal to the current object.

Parameters

obj	The object to compare with the current object.

Returns: true if the specified object is equal to the current object. otherwise, false.

Reimplemented from xtd::object.

◆ equals() [2/2]

template<class type_t , xtd::size extent = dynamic_extent>

bool xtd::span< type_t, extent >::equals ( const span< type_t, extent > & rhs ) const

inlineoverridenoexcept

Indicates whether the current object is equal to another object of the same type.

Parameters

obj	An object to compare with this object.

Returns: true if the current object is equal to the other parameter; otherwise, false.

◆ fill()

template<class type_t , xtd::size extent = dynamic_extent>

void xtd::span< type_t, extent >::fill ( const type_t & value )

inline

Fills the elements of this span with a specified value.

Parameters

value The value to assign to each element of the span.

◆ first() [1/2]

template<class type_t , xtd::size extent = dynamic_extent>

template<xtd::size count>

span< type_t, count > xtd::span< type_t, extent >::first ( ) const

inline

Obtains a subspan consisting of the first count elements of the sequence.

Parameters

count The count elements.

Returns: A span r that is a view over the first count elements of *this, such that r.data() == this->data() && r.size() == count.

◆ first() [2/2]

template<class type_t , xtd::size extent = dynamic_extent>

span< type_t > xtd::span< type_t, extent >::first ( xtd::size count ) const

inline

Obtains a subspan consisting of the first count elements of the sequence.

Parameters

count The count elements.

Returns: A span r that is a view over the first count elements of *this, such that r.data() == this->data() && r.size() == count.

◆ get_hash_code()

template<class type_t , xtd::size extent = dynamic_extent>

xtd::size xtd::span< type_t, extent >::get_hash_code ( ) const

inlineoverridevirtualnoexcept

Serves as a hash function for a particular type.

Returns: A hash code for the current object.

Reimplemented from xtd::object.

◆ last() [1/2]

template<class type_t , xtd::size extent = dynamic_extent>

template<xtd::size count>

span< type_t, count > xtd::span< type_t, extent >::last ( ) const

inline

Obtains a subspan consisting of the last N elements of the sequence.

Parameters

count The count elements.

Returns: A span r that is a view over the last count elements of *this, such that r.data() == this->data() + (this->size() - count) && r.size() == count.

◆ last() [2/2]

template<class type_t , xtd::size extent = dynamic_extent>

span< type_t > xtd::span< type_t, extent >::last ( xtd::size count ) const

inline

Obtains a subspan consisting of the last N elements of the sequence.

Parameters

count The count elements.

Returns: A span r that is a view over the last count elements of *this, such that r.data() == this->data() + (this->size() - count) && r.size() == count.

◆ slice() [1/3]

template<class type_t , xtd::size extent = dynamic_extent>

template<xtd::size start, size_type lenght = xtd::dynamic_extent>

span< type_t > xtd::span< type_t, extent >::slice ( ) const

inline

Forms a slice out of the current span starting at a specified index for a specified length.

Parameters

start	The zero-based index at which to begin this slice.
length	The desired length for the slice.

Returns: A span that consists of length elements from the current span starting at start.

Exceptions

xtd::argument_out_of_range_exception `start` or `start + length` is less than zero or greater than xtd::span::length.

◆ slice() [2/3]

template<class type_t , xtd::size extent = dynamic_extent>

span< type_t > xtd::span< type_t, extent >::slice ( size_type start ) const

inline

Forms a slice out of the current span that begins at a specified index.

Parameters

start The zero-based index at which to begin the slice.

Returns: A span that consists of all elements of the current span from start to the end of the span.

Exceptions

xtd::argument_out_of_range_exception `start` is less than zero or greater than xtd::span::length.

◆ slice() [3/3]

template<class type_t , xtd::size extent = dynamic_extent>

span< type_t > xtd::span< type_t, extent >::slice	(	size_type	start,
		size_type	length
	)		const

inline

Forms a slice out of the current span starting at a specified index for a specified length.

Parameters

start	The zero-based index at which to begin this slice.
length	The desired length for the slice.

Returns: A span that consists of length elements from the current span starting at start.

Exceptions

xtd::argument_out_of_range_exception `start` or `start + length` is less than zero or greater than xtd::span::length.

◆ subspan() [1/2]

template<class type_t , xtd::size extent = dynamic_extent>

template<xtd::size offset, size_type count = xtd::dynamic_extent>

span< type_t > xtd::span< type_t, extent >::subspan ( ) const

inline

Forms a subspan of the current span starting at a specified index for a specified length.

Parameters

offset	The zero-based index at which to begin this slice.
count	The desired length for the slice.

Returns: A span that consists of length elements from the current span starting at start.

Exceptions

xtd::argument_out_of_range_exception `offset` or `offset + count` is less than zero or greater than xtd::span::length.

◆ subspan() [2/2]

template<class type_t , xtd::size extent = dynamic_extent>

span< type_t > xtd::span< type_t, extent >::subspan	(	size_type	offset,
		size_type	count = `xtd::dynamic_extent`
	)		const

inline

Forms a subspan of the current span starting at a specified index for a specified length.

Parameters

offset	The zero-based index at which to begin this slice.
count	The desired length for the slice.

Returns: A span that consists of length elements from the current span starting at start.

Exceptions

xtd::argument_out_of_range_exception `offset` or `offset + count` is less than zero or greater than xtd::span::length.

◆ to_array()

template<class type_t , xtd::size extent = dynamic_extent>

xtd::array< value_type > xtd::span< type_t, extent >::to_array ( ) const

inlinenoexcept

Copies the contents of this span into a new array.

Returns: An array containing the data in the current span.

◆ to_string()

template<class type_t , xtd::size extent = dynamic_extent>

string xtd::span< type_t, extent >::to_string ( ) const

inlineoverridevirtualnoexcept

Returns the string representation of this xtd::span <type_t> object.

Returns: The string representation of this xtd::span <type_t> object.

Remarks: For a xtd::span <type_t>, the xtd::span::to_string method returns a xtd::string that contains the characters pointed to by the xtd::span <type_t>. Otherwise, it returns a xtd::string with collection sequance string of the elements that the xtd::span <type_t> contains separated by ,.

Reimplemented from xtd::object.

◆ try_copy_to()

template<class type_t , xtd::size extent = dynamic_extent>

template<xtd::size length>

bool xtd::span< type_t, extent >::try_copy_to ( span< type_t, length > & destination ) const

inlinenoexcept

Attempts to copy the current xtd::span <type_t> to a destination xtd::span <type_t> and returns a value that indicates whether the copy operation succeeded.

Parameters

destination The target of the copy operation.

Returns: true if the copy operation succeeded; otherwise, false.

Remarks: This method copies all of source to destination even if source and destination overlap.

◆ operator[]() [1/2]

template<class type_t , xtd::size extent = dynamic_extent>

const_reference xtd::span< type_t, extent >::operator[] ( size_type index ) const

inline

Gets the element at the specified zero-based index.

Parameters

index The zero-based index of the element.

Returns: The element at the specified index.

Exceptions

xtd::index_out_of_range_exception `index` is less than zero or greater than or equal to xtd::span::length.

◆ operator[]() [2/2]

template<class type_t , xtd::size extent = dynamic_extent>

reference xtd::span< type_t, extent >::operator[] ( size_type index )

inline

Gets the element at the specified zero-based index.

Parameters

index The zero-based index of the element.

Returns: The element at the specified index.

Exceptions

xtd::index_out_of_range_exception `index` is less than zero or greater than or equal to xtd::span::length.

Member Data Documentation

◆ empty_span

template<class type_t , xtd::size extent>

const span< type_t, extent > xtd::span< type_t, extent >::empty_span

inlinestatic

Returns an empty xtd::span <type_t> object.

Returns: An empty xtd::span <type_t> object.

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

xtd.core/include/xtd/span.hpp

Definition

Public Aliases

Public Properties

Public Constructors

Public Methods

Public Operators

Additional Inherited Members

Member Typedef Documentation

◆ element_type

◆ value_type

◆ size_type

◆ difference_type

◆ pointer

◆ const_pointer

◆ reference

◆ const_reference

◆ iterator

◆ const_iterator

◆ reverse_iterator

◆ const_reverse_iterator

Constructor & Destructor Documentation

◆ span() [1/10]

◆ span() [2/10]

◆ span() [3/10]

◆ span() [4/10]

◆ span() [5/10]

◆ span() [6/10]

◆ span() [7/10]

◆ span() [8/10]

◆ span() [9/10]

◆ span() [10/10]

Member Function Documentation

◆ back()

◆ begin() [1/2]

◆ begin() [2/2]

◆ cbegin()

◆ cend()

◆ crbegin()

◆ crend()

◆ data()

◆ empty()

◆ end() [1/2]

◆ end() [2/2]

◆ front()

◆ is_empty()

◆ length()

◆ rbegin() [1/2]

◆ rbegin() [2/2]

◆ rend() [1/2]

◆ rend() [2/2]

◆ size()

◆ size_bytes()

◆ at() [1/2]

◆ at() [2/2]

◆ clear()

◆ copy_to()

◆ equals() [1/2]

◆ equals() [2/2]

◆ fill()

◆ first() [1/2]

◆ first() [2/2]

◆ get_hash_code()

◆ last() [1/2]

◆ last() [2/2]

◆ slice() [1/3]

◆ slice() [2/3]

◆ slice() [3/3]

◆ subspan() [1/2]

◆ subspan() [2/2]

◆ to_array()

◆ to_string()

◆ try_copy_to()

◆ operator[]() [1/2]

◆ operator[]() [2/2]

Member Data Documentation

◆ empty_span