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std::flat_set<Key,Compare,KeyContainer>::replace

From cppreference.com
< cpp‎ | container‎ | flat set
 
C++
 
Containers library
 
std::flat_set
void replace( container_type&& cont );
(since C++23)

Replaces the underlying container c. Equivalent to: c = std::move(cont);.

The elements of cont must be sorted with respect to compare, and cont must not contain equal elements. Otherwise, the behavior is undefined.

Contents

[edit] Parameters

cont - a sorted container of type KeyContainer, the contents of which will be moved into *this

[edit] Return value

(none)

[edit] Complexity

Equals to complexity of std::move applied to adapted container.

[edit] Example

#include <algorithm>
#include <cassert>
#include <flat_set>
#include <print>
#include <vector>
 
int main()
{
    std::vector<int> keys{1, 2, 3};
    assert(std::ranges::is_sorted(keys));
 
    std::flat_set<int> set;
    assert(set.empty();
 
    set.replace(keys);
    assert(set.size() == 3);
    assert(keys.empty();
 
    std::println("{}", set); / set.keys()
}

Output:

[1, 2, 3]

[edit] See also

extracts the underlying container
(public member function) [edit]

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