> >The C# goto is limited: "goto statements can transfer control within > >blocks and out of blocks, but never into blocks." Does the PHP goto > >implementation have this limitation? > > > No it doesn't. As I mentioned Sara's implementation is extremely flawed. So > yes there is a technical issue here beside a semantic issue. And the C# > limitation might very well apply in PHP too. > Flag on the play....
Yes it *DOES* have this limiter as I've stated at least 4 times on this list and in the patch description itself. I can't tell you how encouraging it is to hear counter-arguments from people who havn't taken the time to explore the topic at hand.
I would love to hear what these flaws are so that I can fix them. Regardless of whether or not GOTO is added to PHP I'd like to improve my ability to maintain and work on the language efficiently.
Hi Sara,
I thought you were aware of the problems (that's what I understood from you). I guess I got the wrong idea and in no way meant to insult your work.
A few problems:
a) Performance wise the right thing to do is to use static labels and pre-compute them during compile-time (I remembered you were aware of that).
b) We therefore should not require an additional opcode for goto.
c) I don't think you are creating the necessary switch_free's and other frees when jumping out of a scope unexpectedly.
d) Due to (c) it would make it pretty much impossible to jump into code blocks (i.e. the C# example).
Again, I in know way meant to offend you, I just got the impression you were aware of some of these problems and just did it for fun.
Andi
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