Is it an absolute requirement to have all the code within the while/for expression? I.e. is the following acceptable:

my $iter = TQDM::tqdm(1..10);

while (<$iter>) {
    print "got [$_]\n";
}
[download]

If so, then the behaviour you want is easily achieved using overloaded '<>'.

Otherwise, I think you need a custom iterator function, e.g.

sub iterate ($&) {
    my ($ary, $code) = @_;
    for (@$ary) {
        print "progress bar: $_\n";
        $code->();
    }
}

sub tqdm { bless [ @_ ] }

iterate tqdm(1..10), sub {
    print "got [$_]\n";
};
[download]

Dave.

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