std::multimap<Key,T,Compare,Allocator>::insert_range

 

C++

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Feature test macros (C++20)

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Symbols index

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array (C++11)

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list

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unordered_set (C++11)

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unordered_map (C++11)

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flat_map (C++23)

flat_multimap (C++23)

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std::multimap

Member functions

multimap::multimap multimap::~multimap        multimap::operator= multimap::get_allocator

Iterators multimap::beginmultimap::cbegin (C++11) multimap::endmultimap::cend (C++11) multimap::rbeginmultimap::crbegin (C++11)    multimap::rendmultimap::crend (C++11) Capacity multimap::size multimap::max_size multimap::empty Observers multimap::key_comp multimap::value_comp Modifiers multimap::clear multimap::insert multimap::erase multimap::swap multimap::merge (C++17) multimap::insert_range (C++23) multimap::emplace (C++11) multimap::emplace_hint (C++11) multimap::extract (C++17) Lookup multimap::count multimap::find multimap::contains (C++20) multimap::equal_range multimap::lower_bound multimap::upper_bound

Non-member functions

operator==operator<=> (C++20) std::swap(std::multimap) erase_if(std::multimap) (C++20)   operator!=operator<operator>operator<=operator>= (until C++20)(until C++20)(until C++20)(until C++20)(until C++20)

Deduction guides(C++17)

 

template< container-compatible-range<value_type> R > void insert_range( R&& rg );		(since C++23)

Inserts a copy of each element in the range rg.

Each iterator in the range rg is dereferenced exactly once. The behavior is undefined if rg overlaps with the container.

No iterators or references are invalidated.

Parameters

rg	-	a container compatible range, that is, an input_range whose elements are convertible to T
Type requirements
- value_type must be EmplaceConstructible into multimap from *ranges::begin(rg). Otherwise, the behavior is undefined.

Return value

(none)

Complexity

N·log(a.size() + N), where N is ranges::distance(rg).

Notes

Feature-test macro	Value	Std	Feature
__cpp_lib_containers_ranges	202202L	(C++23)	Ranges-aware construction and insertion

Example

Run this code

#include <iostream>
#include <map>
#include <utility>
 
void println(auto, auto const& container)
{
    for (const auto& [key, value] : container)
        std::cout << '{' << key << ',' << value << '}' << ' ';
    std::cout << '\n';
}
 
int main()
{
    auto container = std::multimap{std::pair{1, 11}, {3, 33}, {2, 22}, {4, 44}};
    const auto rg = {std::pair{-1, -11}, {3, -33}, {-2, -22}};
#ifdef __cpp_lib_containers_ranges
    container.insert_range(rg);
#else
    container.insert(rg.begin(), rg.end());
#endif
    println("{}", container);
}

Output:

{-2,-22} {-1,-11} {1,11} {2,22} {3,33} {3,-33} {4,44}

See also

insert

inserts elements or nodes(since C++17) (public member function)