std::multimap<Key,T,Compare,Allocator>::insert_range
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Feature test macros (C++20)
Concepts library (C++20)
Metaprogramming library (C++11)
Ranges library (C++20)
Filesystem library (C++17)
Concurrency support library (C++11)
Execution control library (C++26)
Containers library
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Tables
std::multimap
Non-member functions
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multimap::insert_range
(C++23)
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(until C++20)(until C++20)(until C++20)(until C++20)(until C++20)
template< container-compatible-range <value_type> R >
void insert_range( R&& rg );
(since C++23) void insert_range( R&& rg );
(constexpr since C++26)
Inserts a copy of each element in the range rg.
Each iterator in the range rg is dereferenced exactly once.
If any of the following conditions is satisfied, the behavior is undefined:
-
value_typeis not EmplaceConstructible intomultimapfrom *ranges::begin (rg) - rg and *this overlap.
No iterators or references are invalidated.
Contents
[edit] Parameters
[edit] Complexity
\(\scriptsize N \cdot \log(S + N)\)N·log(S+N), where \(\scriptsize S\)S is size() and \(\scriptsize N\)N is ranges::distance (rg).
[edit] Notes
| Feature-test macro | Value | Std | Feature |
|---|---|---|---|
__cpp_lib_containers_ranges |
202202L |
(C++23) | Ranges-aware construction and insertion |
[edit] Example
Run this code
#include <iostream> #include <map> #include <utility> void println(auto, const auto& 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}