Short and sweet examples:
sub a { print }
sub b { local ( $_ ) = @_; goto &a }
b("Hi\n");
prints nothing, but
sub a { print }
sub b { local ( $_ ) = @_; a(@_) }
b("Hi\n");
(changing only
goto &a to
a(@_)) prints
Hi. It's not clear to me that
Temporary Values via local() indicates that this is the expected behaviour. Is it happening because dynamic scoping and TCO are incompatible (is that even true?), or is it just an artifact of the guts of Perl, or … other?
UPDATE: Ha, I'm reading the wrong docs; shoulda looked at goto, as lakshmananindia and moritz indicated—thanks! Still, I wonder if there's a reason for this—it seems to me that the combination of dynamic scoping and TCO could be useful.
UPDATE 2: Thanks to anonymonk, I also noticed that I forgot the locals. No more 3 AM posting for me. :-)
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