How to avoid iterator invalid post erase in a function

Question

Refer below code :

It just demonstrate add to list and erase from list...
Write now code works as it is of int and I have updated iterator in statement related to the erase

Assume that below four lines are in a seperate function:

if (*itrA == 5 && *itrB == 3)
myList.push_back(15);
if (*itrA == 5 && *itrB == 10)
itrB = myList.erase(itrB);

And also assume that iterator is pointing to class pointer instead of int... Itra and itrb is assigned to a local pointer variable and passed those variables to function which push_backs and erases...

How to avoid iterator invalid now in function ?

Feel free to ask for queries. If it is not clear, let me know and will create a full scenario in sample code

https://code.sololearn.com/cCVaR6OkyIeg/?ref=app

Answer 1

There is a function l.remove_if(lambda)
Or you can use a new list to add elements in the list because its just pointers