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std::flat_multiset<Key,Compare,KeyContainer>::clear

From cppreference.com
 
 
 
std::flat_multiset
 
void clear() noexcept;
(since C++23)
(constexpr since C++26)

Erases all elements from the container adaptor. After this call, size() returns zero.

Invalidates any references, pointers, and iterators referring to contained elements.

[edit] Complexity

Linear in the size of the container adaptor, i.e., the number of elements.

[edit] Example

Run this code
#include <iostream>
#include <string_view>
#include <flat_set>
 
void print_info(std::string_view rem, const std::flat_multiset <int>& v)
{
 std::cout << rem << "{ ";
 for (const auto& value : v)
 std::cout << value << ' ';
 std::cout << "}\n";
 std::cout << "Size=" << v.size() << '\n';
}
 
int main()
{
 std::flat_multiset <int> container{1, 2, 3};
 print_info("Before clear: ", container);
 container.clear();
 print_info("After clear: ", container);
}

Output:

Before clear: { 1 2 3 }
Size=3
After clear: { }
Size=0

[edit] See also

erases elements
(public member function) [edit]
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