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Nice. It does have negative one side effect, though. If you are reading from some other file (say <STDIN>), and you reference $pos, the tell or seek will change perl's idea of the most recent input file to F. This will mess up the "<STDIN> line n" in any error/warning message, and also change what handle the $. var is looked up in.

To fix this, put a local $.; in STORE and FETCH. (For some reason, this then triggers some warnings from STORE when $pos is localized. Fix by saying seek($pos||0,0)).

If you are downvoting this for other than lack of interest, thanks for sending me a message or reply to let me know why so I can do better (or just stay quiet) next time.


In reply to Re: Re: Re: Re: desire to pass file handles by value by ysth
in thread desire to pass file handles by value by mandog

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