From: Robert Klemme <shortcutter@...>
Date: 2009-04-30T20:11:51+09:00
Subject: Re: Random Access using IO#pos in code blocks

2009/4/30 Brian Candler <b.candler@pobox.com>:
> Robert Klemme wrote:
>> I do have to admit though that I
>> do not know when the object is allocated (i.e. at time of match or
>> when referencing $`).
>
> Experiment suggests the MatchData is created immediately on the match,
> and the string is instantiated lazily from that. This makes sense; it
> would be very inefficient to allocate strings for $`, $1, $2, $3, ... $'
> when maybe none of them will be used. But the MatchData object has the
> original string plus all the offsets.

Ah, good to know!  Thanks for the experimenting!

"Tune in next week when you'll hear Dr. Brian say: what's this fuse for?"
;-)

Kind regards

robert

-- 
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