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

 

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::set

Member functions

set::set

set::~set

set::operator=

set::get_allocator

Iterators

set::beginset::cbegin (C++11)

set::endset::cend (C++11)

set::rbeginset::crbegin (C++11)

set::rendset::crend (C++11)

Capacity

set::empty

set::size

set::max_size

Modifiers

set::clear

set::insert

set::emplace (C++11)

set::emplace_hint (C++11)

set::erase

set::swap

set::extract (C++17)

set::merge (C++17)

Lookup

set::count

set::find

set::contains (C++20)

set::equal_range

set::lower_bound

set::upper_bound

Observers

set::key_comp

set::value_comp

Deduction guides(C++17)

 

template< class Key, class Compare, class Alloc > bool operator==( const std::set<Key,Compare,Alloc>& lhs,                  const std::set<Key,Compare,Alloc>& rhs );	(1)
template< class Key, class Compare, class Alloc > bool operator!=( const std::set<Key,Compare,Alloc>& lhs,                  const std::set<Key,Compare,Alloc>& rhs );	(2)
template< class Key, class Compare, class Alloc > bool operator<( const std::set<Key,Compare,Alloc>& lhs,                 const std::set<Key,Compare,Alloc>& rhs );	(3)
template< class Key, class Compare, class Alloc > bool operator<=( const std::set<Key,Compare,Alloc>& lhs,                  const std::set<Key,Compare,Alloc>& rhs );	(4)
template< class Key, class Compare, class Alloc > bool operator>( const std::set<Key,Compare,Alloc>& lhs,                 const std::set<Key,Compare,Alloc>& rhs );	(5)
template< class Key, class Compare, class Alloc > bool operator>=( const std::set<Key,Compare,Alloc>& lhs,                  const std::set<Key,Compare,Alloc>& rhs );	(6)

Compares the contents of two containers.

1-2) Checks if the contents of lhs and rhs are equal, that is, they have the same number of elements and each element in lhs compares equal with the element in rhs at the same position.

3-6) Compares the contents of lhs and rhs lexicographically. The comparison is performed by a function equivalent to std::lexicographical_compare. This comparison ignores the container's ordering Compare.

Parameters

lhs, rhs	-	containers whose contents to compare
- Key must meet the requirements of EqualityComparable in order to use overloads (1-2).

Return value

1) true if the contents of the containers are equal, false otherwise

2) true if the contents of the containers are not equal, false otherwise

3) true if the contents of the lhs are lexicographically less than the contents of rhs, false otherwise

4) true if the contents of the lhs are lexicographically less than or equal the contents of rhs, false otherwise

5) true if the contents of the lhs are lexicographically greater than the contents of rhs, false otherwise

6) true if the contents of the lhs are lexicographically greater than or equal the contents of rhs, false otherwise

Complexity

1-2) Constant if lhs and rhs are of different size, otherwise linear in the size of the container

3-6) Linear in the size of the container