Sorry, but I don't see why (on its own) this is a bad idea. If @callbacks is under your complete control and you know that all your callback subs behave according to some set of rules then I see little wrong with it. If however @callbacks is not under your control then you have a different issue. At that point I would recommend a series of checks: 

foreach my $callback (@callbacks) {
    (ref($callback) eq "CODE") || die "$callback is not a code ref";
    my @temp_args = @{[@args]};
    $callback->(@temp_args);
    if (verify(@temp_args)) {
        @args = @temp_args;
    }
    else {
        die "callback did something funky to args";
    }
}

[download]
I'm sorry, but given the amount of information you have supplied here, I don't really see what you are trying to get at. Callbacks are a common enough idiom, but when used loosly they can be dangerous, but if you really wanna go there then you could say that plain old assignment (=) is dangerous.

Please provide a bit more information on the code, and how things like @callbacks and @args get populated, along with maybe a bit more context as to where this all gets executed.

-stvn

In reply to Re: Action at a great distance by stvn
in thread Action at a great distance by sfink

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