forward_list::max_size() in C++ STL

std::forward_list::max_size() is an inbuilt function in CPP STL which returns the maximum number of elements can be held by forward_list. This value depends on system or library implementation.

Syntax:

forwardlist_name.max_size ()

Parameters: The function does not accept any parameters.

Return value:The function returns the maximum numbers that can be stored into the forward_list.

Below program demonstrates the above function: 

CPP

// C++ program to illustrate the
// max_size() function
#include <bits/stdc++.h>
using namespace std;

int main()
{
    // initialising the forward list
    forward_list<int> f;

    // print max number of values that
    // can be held by forward_list
    cout << "Max_size of the list is "
    << f.max_size() << endl;

    return 0;
}

Output

Max_size of the list is 1152921504606846975

 Time Complexity: O(1)

Auxiliary Space: O(1)