dequeue removes the wrong list item

[boykobb]

dequeue happens to remove and output the first item of a list (thus being identical to pop), while it should remove and return the last item.

[dmalec]

This is the behavior I am seeing for QUEUE / DEQUEUE:

? MAKE "my.queue (LIST )
? PRINT my.queue

? QUEUE "my.queue "foo
? PRINT my.queue
foo
? QUEUE "my.queue "bar
? PRINT my.queue
foo bar
? QUEUE "my.queue "baz
? PRINT my.queue
foo bar baz
? PRINT DEQUEUE "my.queue
foo

Whereas this is the behavior I'm seeing for PUSH / POP:

? MAKE "my.stack (LIST )
? PRINT my.stack

? PUSH "my.stack "foo
? PRINT my.stack
foo
? PUSH "my.stack "bar
? PRINT my.stack
bar foo
? PUSH "my.stack "baz
? PRINT my.stack
baz bar foo
? PRINT POP "my.stack
baz

So, DEQUEUE and POP are both returning the first item in the list; but, if you constructed the list using their counterparts QUEUE and PUSH, I believe the code works as expected.

Is there a particular problem you're trying to tackle where it's not so much about the behavior of DEQUEUE and POP as it is that you'd like to get the last item from a list? Or are you seeing different behavior than what I'm seeing?