http://www.vpri.org/pdf/packrat_TR-2007-002.pdf
Hello,
I'm having trouble understanding the following
pseudo-code line from Figure 4 on page 5 of your PDF:
if lr.detected and ans =/= FAIL
I'm missing where lr.detected ever gets set to TRUE.
I realize ans may itself be an LR data type, but I don't
see how the ans returned by EVAL(R.body) is the same
LR that the variable lr is bound to.
It seems to me that lr.detected would remain FALSE
I do see an assignment in the else clause (when m was found in memo table)
if m.ans is LR
then m.ans.detected <- TRUE
but lr.detected is being tested in the not-yet-memoized case.
Can anyone lead me into the light?
Thank you,
Chris Bratlien
Alessandro Warth wrote:
Hello,
Our paper, "Packrat Parsers Can Support Left Recursion", is finally ready
for public consumption. :) Those of you who are interested can download it
from the VPRI writings page, http://www.vpri.org/html/writings.htm
Cheers,
Alex
On Sep 20, 2007 8:31 AM, Claudio Campos <[EMAIL PROTECTED]>
wrote:
VPRI Folks,
Are there any version or update of OMeta (Meta for Squeak) that support
left
recursion (as describe in paper: "pakrat parser can support left
recursion"
with memoization table)
Thanks,
Claudio Campos
Santa Fe, Argentina
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