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Difference between revisions of "cpp/container/multimap/insert"

From cppreference.com
< cpp‎ | container‎ | multimap
(update hint description for C++11)
(+non-template rvalue inserts LWG 2354)
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template< class P >
 
template< class P >
 
iterator insert( P&& value );
 
iterator insert( P&& value );
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}}
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{{dcl | num=2 | since=c++17 |
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iterator insert( value_type&& value );
 
}}
 
}}
 
{{dcl rev begin | num=3}}
 
{{dcl rev begin | num=3}}
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template< class P >
 
template< class P >
 
iterator insert( const_iterator hint, P&& value );
 
iterator insert( const_iterator hint, P&& value );
 +
}}
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{{dcl | num=4 | since=c++17 |
 +
iterator insert( const_iterator hint, value_type&& value );
 
}}
 
}}
 
{{dcl | num=5 |  
 
{{dcl | num=5 |  

Revision as of 06:55, 17 December 2014

 
 
 
 
iterator insert( const value_type& value );
(1)
template< class P >
iterator insert( P&& value );
(2) (since C++11)
iterator insert( value_type&& value );
(2) (since C++17)
(3)
iterator insert( iterator hint, const value_type& value );
(until C++11)
iterator insert( const_iterator hint, const value_type& value );
(since C++11)
template< class P >
iterator insert( const_iterator hint, P&& value );
(4) (since C++11)
iterator insert( const_iterator hint, value_type&& value );
(4) (since C++17)
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.

1-2) inserts value. If the container has elements with equivalent key, inserts at the upper bound of that range.(since C++11) The overload (2) is equivalent to emplace(std::forward<P>(value)) and only participates in overload resolution if std::is_constructible<value_type, P&&>::value == true.
3-4) inserts value in the position as close as possible, just prior(since C++11), to hint. The overload (4) is equivalent to emplace_hint(hint, std::forward<P>(value)) and only participates in overload resolution if std::is_constructible<value_type, P&&>::value == true.
5) inserts elements from range [first, last).
6) inserts elements from initializer list ilist.

No iterators or references are invalidated. If the insertion is successful, pointers and references to the element obtained while it is held in the node handle are invalidated, and pointers and references obtained to that element before it was extracted become valid.(since C++17)

Contents

Parameters

hint -
iterator, used as a suggestion as to where to start the search (until C++11)
iterator to the position before which the new element will be inserted (since C++11)
value - element value to insert
first, last - range of elements to insert
ilist - initializer list to insert the values from
Type requirements

Template:par req concept

Return value

1-4) Returns an iterator to the inserted element.
5-6) (none)

Exceptions

1-4) If an exception is thrown by any operation, the insertion has no effect.

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 the hint, logarithmic in the size of the container otherwise.
(until C++11)
3-4) Amortized constant if the insertion happens in the position just before the hint, logarithmic in the size of the container otherwise.
(since C++11)
5-6) O(N*log(size() + N)), where N is the number of elements to insert.

See also

(C++11)
constructs element in-place
(public member function) [edit]
constructs elements in-place using a hint
(public member function) [edit]