···

       
17
       
 
       
    self.end = new_node;

     

       
18
       
 
       
}

     

       
19
       
 
       


     

       
20
       
-
       
pub fn dequeue(self: *Queue) ?Node {

     

       
21
       
 
       
    const start = self.start orelse return null;

     

       
22
       
 
       
    if (start.next) |next| {

     

       
23
       
 
       
        self.start = next;

     

···

       
17
       
 
       
    self.end = new_node;

     

       
18
       
 
       
}

     

       
19
       
 
       


     

       
20
       
+
       
pub fn dequeue(self: *Queue) ?*Node {

     

       
21
       
 
       
    const start = self.start orelse return null;

     

       
22
       
 
       
    if (start.next) |next| {

     

       
23
       
 
       
        self.start = next;