std::basic_string::shrink_to_fit
From Cppreference
< cpp | string | basic string
| void shrink_to_fit();
| (since C++11) | |
Requests the removal of unused capacity.
It is a non-binding request to reduce capacity to size. It depends on the implementation if the request is fulfilled.
Contents |
[edit] Parameters
(none)
[edit] Return value
(none)
[edit] Complexity
Constant
[edit] Example
#include <iostream> #include <string> int main() { std::string s; std::cout << "Default-constructed capacity is " << s.capacity() << '\n'; s.resize(100); std::cout << "Capacity of a 100-element string is " << s.capacity() << '\n'; s.clear(); std::cout << "Capacity after clear() is " << s.capacity() << '\n'; s.shrink_to_fit(); std::cout << "Capacity after shrink_to_fit() is " << s.capacity() << '\n'; }
Output:
Default-constructed capacity is 0 Capacity of a 100-element string is 100 Capacity after clear() is 100 Capacity after shrink_to_fit() is 0
[edit] See also
| returns the number of characters (public member function) | |
| returns the number of characters that can be held in currently allocated storage (public member function) | |
