> I'm going to play newbie and ask you for an example of how you think goto &traverse_rec; is tail-recursive. 

use warnings;
sub recurse {
    my $i = shift;
    return if $i == 0;
    recurse($i-1);
}

sub tailless_recurse {
    my $i = shift;
    return if $i == 0;
    @_ = ($i-1);
    goto &tailless_recurse;
}

print "recursing\n";
recurse(200);
print "tailless_recursing\n";
tailless_recurse(200);

[download]

This produces the following output: 

recursing
Deep recursion on subroutine "main::recurse" at /tmp/p line 7.
tailless_recursing

[download]

Note that the second one doesn't produce the deep recursion warning.

In reply to Re: Tail Recursion in Perl by Anonymous Monk
in thread Tail Recursion in Perl by stvn

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