On 27 apr 2010, at 22:12, Jason Dusek wrote:
So UU parsers can construct input?
The perform an editing action on the input so it becomes a sentence of the
language recognised.
The presence of an
empty list in the 2nd slot of the tuple is the only
indicator of errors?
The parser wants
I had been using Parsec to parse VCD files, but needed to lazily parse
streaming data. After stumbling on this thread below, I switch to
polyparse.
What a great library! I was able to migrate from a strict to a
semi-lazy parser and many of my parse reductions didn't even need to
change. Thanks
How about:
import Text.ParserCombinators.UU.Parsing
import Text.ParserCombinators.UU.Examples
pDate :: Pars (Int,Int,Int)
pDate = (,,) $ pNatural * pDot * pNatural * pDot * pNatural
where pDot = pSym '.'
and then:
*Main test pDate 3.4.5
Loading package syb-0.1.0.2 ... linking ...
So UU parsers can construct input? The presence of an
empty list in the 2nd slot of the tuple is the only
indicator of errors?
For parsing datatypes without a sensible default value,
what happens?
--
Jason Dusek
___
Haskell-Cafe mailing list
Lazy parsing has been the default for the last ten years in uulib, and
is now available in the simple uu-parsinglib (http://hackage.haskell.org/cgi-bin/hackage-scripts/package/uu-parsinglib
). The whole design of the latter in described in a technical report
to which references are given on
In the uu-parsinglib we actually have two versions of parsers: lazy
ones and strict ones, which have different types. So by giving a type
annotation you can select the one you want. Notice that in the left-
hand side of a monadic construct it does not make sense to use a lazy
parser, since
Dear Doaitse,
In the days since my original post I had already come to favor the
uu-parsing package. I have printed the report and read it every day to
figure out how to use it. I cannot follow everything yet, and also hope
that won't be necessary in order to use it. :-)
My progress is a bit
Henning Thielemann schlepp...@henning-thielemann.de wrote:
I don't think that it is in general possible to use the same parser
for lazy and strict parsing, just because of the handling of parser
failure.
Polyparse demonstrates that you can mix-and-match lazy parsers with
strict parsers in the
Günther Schmidt schrieb:
Hi all,
is it possible to do lazy parsing with Parsec? I understand that one can
do that with polyparse, don't know about uulib, but I happen to be
already somewhat familiar with Parsec, so before I do switch to
polyparse I rather make sure I actually have to.
On Wed, 27 May 2009, Gü?nther Schmidt wrote:
is it possible to do lazy parsing with Parsec? I understand that one can do
that with polyparse, don't know about uulib, but I happen to be already
somewhat familiar with Parsec, so before I do switch to polyparse I rather
make sure I actually
Hi all,
is it possible to do lazy parsing with Parsec? I understand that one can
do that with polyparse, don't know about uulib, but I happen to be
already somewhat familiar with Parsec, so before I do switch to
polyparse I rather make sure I actually have to.
The files it has to parse is
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