Even so, it's easier to understand than the nested-subroutines solution.
More importantly, the stackdump is more easily understood.
I wonder if anybody out there has got something even simpler.
I would hope there's something better than that. For one thing, my version doesn't allow each function to be a closure. Though, that's easy enough to fix, I suppose.
sub localize {
my $real = pop;
no strict 'refs'; no warnings 'redefine';
goto CALL unless @_;
AGAIN: my $v = shift;
local *{$v} = do {
my $v2 = $v;
sub { "changed $v2" }
};
goto AGAIN if @_;
CALL: $real->();
}
My criteria for good software:
- Does it work?
- Can someone else come in, make a change, and be reasonably certain no bugs were introduced?
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