This is clever. I like it.
So we'd end up with something inconvenient like
sub invoke_static {
my ($class, $method, @args) = @_;
no strict 'refs';
# I'd like to only localize *{$class}{IO},
# but we can't have everything, right?
local *{$class};
$class->$method(@args);
}
or something insane like
sub safe_from_evil_filehandles(&) {
my ($cb) = @_;
my @evil_globs;
... # walk through %:: and list all globs
# where *{$entry}{IO} is defined
# unless they're OK like "STDOUT"
my $localizer; $localizer = sub {
return $cb->() unless @evil_globs;
local *{shift @evil_globs};
return $localizer->();
};
return $localizer->();
}