std::flat_set<Key,Compare,KeyContainer>::size
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std::flat_set
flat_set::size
size_type size() const noexcept;
(since C++23)
Returns the number of elements in the container adaptor. Equivalent to: return c .size().
[edit] Parameters
(none)
[edit] Return value
The number of elements in the container adaptor.
[edit] Complexity
Constant.
[edit] Example
Run this code
#include <cassert> #include <flat_set> int main() { std::flat_set <int> nums{4, 2, 4, 2}; assert (nums.size() == 2); }