CS202
6- ‹#›
>> Operators
istream & operator >> (istream & in, list
& l) {
node * current = l.tail;
if
(!current) { //empty list starting
out
l.head = current = new node;
in >>l.head->obj;
l.tail = l.ptr = l.head;
l.head->next = NULL;
}
n
node * savelist = l.tail->next;
char next_char;
while
((next_char = in.peek()) != ‘\n’ &&
next_char != EOF) {
current->next = new node;
current = current->next;
in >>current->obj;
//what does this do?
}
current->next
= savelist; ptr = current;
if
(!savelist) l.tail = current;
return
in;
}