Ferenc Kovacs wrote (on 13/08/2014):
I think you misunderstood that part, I was thinking about a state
machine like this:
1. function doStuff(){
2. switch($state){
3. case OPENDOOR:
4. if(!opendoor()){
5. break;
6. }
7. $state = SITDOWN;
8. case SITDOWN:
9. if(!sitdown()){
10. break;
11. }
12. $state = SIPWHISKEY;
13. case SIPWHISKEY:
14. sipwhiskey();
15. }
16. }
where you modify the switch variable in one case and fall through into
another.
as I mentioned I don't have a reasonable use-case for multiple
defaults, but I can see some for multiple case labels in general, and
I don't think that it is better to have different behavior for case
and default in this regard.
The assignments to $state in that code do not make any difference to
execution, control simply flows forwards whenever there is no "break".
$state is only tested once, to select the initial label to jump to, so
no amount of reassigning it, or adding duplicate labels, can ever cause
a second jump.
I'm tempted to write a PHP script that emulates the switch execution by
building a set of if and goto statements, which might make some of this
behaviour clearer (not just for this discussion, but for other confusion
I've seen elsewhere), but I don't have time right now.
