From: MonkeeSage <MonkeeSage@...>
Date: 2007-12-04T11:45:01+09:00
Subject: Re: Everyone's favorite flow control: retry

On Dec 3, 8:22 pm, Charles Oliver Nutter <charles.nut...@sun.com>
wrote:
> MonkeeSage wrote:
> > As I understand, it's like a label in C. Charles' first example is
> > equivalent to something like this...
>
> > #include <stdio.h>
> > void foo(int (*pf)(const char *f, ...), char *a) {
> >   (*pf)("%s\n", a);
> > }
> > int main() {
> > retry:
> >   foo(&printf, "123");
> >   goto retry;
> >   return 0;
> > }
>
> It's more than that...here's some pseudo C code:
>
> void foo() { goto retry; }
> int main() {
> retry:
>    foo();
>    return 0;
>
> }
>
> Retry outside a rescue actually allows you to jump back across call
> boundaries and start an invocation again. Scary.
>
> - Charlie

Ah. How does it unwind the stack like that? Is that what you meant
about implementation specific stuff?

Ps. I don't think anyone will miss retry outside of a rescue. I won't
at least. :)

Regards,
Jordan