std::operator ==,!=,<,<=,>,>= (std::span)

 

C++

Language

Headers

Freestanding and hosted implementations

Named requirements

Language support library

Concepts library (C++20)

Diagnostics library

Utilities library

Strings library

Containers library

Algorithms library

Iterators 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::operator[]span::operator()

span::data

Iterators

span::beginspan::cbegin

span::endspan::cend

span::rbeginspan::crbegin

span::rendspan::crend

Observers

span::empty

span::size

span::size_bytes

Subviews

span::first

span::last

span::subspan

Non-member functions

operator==operator!=operator<operator<=operator>operator>=

as_bytesas_writable_bytes

Non-member constant

dynamic_extent

Deduction guides

 

template <class T, std::ptrdiff_t X, class U, std::ptrdiff_t Y> constexpr bool operator==(std::span<T, X> l, std::span<U, Y> r);	(1)
template <class T, std::ptrdiff_t X, class U, std::ptrdiff_t Y> constexpr bool operator!=(std::span<T, X> l, std::span<U, Y> r);	(2)
template <class T, std::ptrdiff_t X, class U, std::ptrdiff_t Y> constexpr bool operator<(std::span<T, X> l, std::span<U, Y> r);	(3)
template <class T, std::ptrdiff_t X, class U, std::ptrdiff_t Y> constexpr bool operator<=(std::span<T, X> l, std::span<U, Y> r);	(4)
template <class T, std::ptrdiff_t X, class U, std::ptrdiff_t Y> constexpr bool operator>(std::span<T, X> l, std::span<U, Y> r);	(5)
template <class T, std::ptrdiff_t X, class U, std::ptrdiff_t Y> constexpr bool operator>=(std::span<T, X> l, std::span<U, Y> r);	(6)

Lexicographically compare the contents of two spans.

1) Equivalent to return std::equal(l.begin(), l.end(), r.begin(), r.end());.

2) Equivalent to return !(l == r);.

3) Equivalent to return std::lexicographical_compare(l.begin(), l.end(), r.begin(), r.end());.

4) Equivalent to return !(r < l);.

5) Equivalent to return (r < l);.

6) Equivalent to return !(l < r);.

Parameters

l, r

-

spans to compare

Return value

The result of the comparison.