c++c++11stlforward-list

insert element at the beginning of std::forward_list

I want to remove element from std::forward_list and insert it to the beginning of list But there is no insert method ... It just has insert_after !

How can I insert element at the beginning of std::forward_list ?

Solution

  • You can use method push_front

    to insert an element at the beginning of the list

    Another approach is to use method insert_after.

    Here is an example of using the both methods

    std::forward_list<int> l;

l.push_front( 1 );
l.insert_after( l.cbefore_begin(), 0 );

for ( int x : l ) std::cout << x << ' ';
std::cout << std::endl;