std::set::insert

 

C++

Language

Standard library headers

Concepts

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)

 

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

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std::set

Member functions

set::set

set::~set

set::operator=

set::get_allocator

Iterators

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

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

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

set::rend set::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

Lookup

set::count

set::find

set::equal_range

set::lower_bound

set::upper_bound

Observers

set::key_comp

set::value_comp

 

std::pair<iterator,bool> insert( const value_type& value );	(1)
std::pair<iterator,bool> insert( value_type&& value );	(2)	(since C++11)
iterator insert( iterator hint, const value_type& value ); iterator insert( const_iterator hint, const value_type& value );	(3)	(until C++11) (since C++11)
iterator insert( const_iterator hint, value_type&& value );	(4)	(since C++11)
template< class InputIt > void insert( InputIt first, InputIt last );	(5)
void insert( std::initializer_list<value_type> ilist );	(6)	(since C++11)

Inserts element(s) into the container, if the container doesn't already contain an element with an equivalent key.

1-2) inserts value.

3-4) inserts value in the position as close as possible, just prior(since C++11), to hint.

5) inserts elements from range [first, last).

6) inserts elements from initializer list ilist.

No iterators or references are invalidated.

Parameters

hint	-	iterator, used as a suggestion as to where to insert the content
value	-	element value to insert
first, last	-	range of elements to insert
ilist	-	initializer list to insert the values from
Type requirements
- InputIt must meet the requirements of InputIterator.

Return value

1-2) returns a pair consisting of an iterator to the inserted element (or to the element that prevented the insertion) and a bool denoting whether the insertion took place.

3-4) returns an iterator to the inserted element, or to the element that prevented the insertion.

5-6) none.

Complexity

1-2) Logarithmic in the size of the container, O(log(size())).

3-4) Amortized constant if the insertion happens in the position just after(until C++11)/before(since C++11) the hint, logarithmic in the size of the container otherwise.

5-6) O(N*log(size() + N)), where N is the number of elements to insert.

See also

emplace (C++11)	constructs element in-place (public member function)
emplace_hint (C++11)	constructs elements in-place using a hint (public member function)