std::flat_multimap<Key,T,Compare,KeyContainer,MappedContainer>::size
size_type size() const noexcept; | (since C++23) |
Returns the number of elements in the container adaptor. Equivalent to: return c.keys.size().
Return value
The number of elements in the container adaptor.
Complexity
Constant.
Example
#include <cassert>
#include <flat_map>
int main()
{
std::flat_multimap<int, char> nums{{1, 'a'}, {1, 'b'}, {2, 'c'}, {2, 'd'}};
assert(nums.size() == 4);
}
See also
| checks whether the container adaptor is empty (public member function) |
|
|
(C++17)(C++20) | returns the size of a container or array (function template) |
| returns the maximum possible number of elements (public member function) |
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