deduction guides for std::span

 

C++

Language

Standard Library Headers

Freestanding and hosted implementations

Named requirements

Language support library

Concepts library (C++20)

Diagnostics library

Utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

Filesystem library (C++17)

Technical Specifications

 

Containers library

array (C++11)

vector

deque

forward_list (C++11)

list

set

multiset

map

multimap

unordered_set (C++11)

unordered_multiset (C++11)

unordered_map (C++11)

unordered_multimap (C++11)

stack

queue

priority_queue

span (C++20)

 

std::span

Member functions

span::span

span::operator=

Element access

span::front

span::back

span::operator[]

span::data

Iterators

span::begin

span::end

span::rbegin

span::rend

Observers

span::empty

span::size

span::size_bytes

Subviews

span::first

span::last

span::subspan

Non-member functions

as_bytesas_writable_bytes

Non-member constant

dynamic_extent

Deduction guides

 

Defined in header <span>
template <class It, class End> span(It, End) -> span<std::remove_reference_t<std::iter_reference_t<It>>>;	(1)
template<class T, std::size_t N> span(T (&)[N]) -> span<T, N>;	(2)
template<class T, std::size_t N> span(std::array<T, N>&) -> span<T, N>;	(3)
template<class T, std::size_t N> span(const std::array<T, N>&) -> span<const T, N>;	(4)
template<class R> span(R&&) -> span<std::remove_reference_t<std::ranges::range_reference_t<R>>>;	(5)

The following deduction guides are provided for span.

(1) allow the element type to be deduced from the iterator-sentinel pair This overload only participates in overload resolution if It satisfies contiguous_iterator

(2-4) allow the static extent to be deduced from built-in arrays and std::array.

(5) allow the element type to be deduced from ranges. This overload only participates in overload resolution if R satisfies contiguous_range