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I have *no* idea about parsers.  I just rewrote the letter-by-letter parser
of PGF because I felt a few options missing (and the implementation is
nowhere near as powerful as it could be) when I heard about it and wanted
to play with it.  I don't have any serious application for it, in PGF it is
only used for the SVG parser of the `svg.path` library.

But I toyed with the idea to write a standalone package which includes a
similar letter-by-letter parser (well, actually it's a token-by-token
parser), just so interested users don't have to load the rather hefty
overhead of PGF.

Best,
Jonathan

On Wed, 2020-02-19 12:27:31, Bruno Le Floch wrote:
> I've been *toying* for a long time (haven't gone very far) with the idea
> of writing a parser generator, but I couldn't decide how powerful to
> make it.  One option would be to support "parsing expression grammars"
> (PEGs), which can be parsed in linear time using a packrat parser (but
> use a lot of memory, possibly problematic).  Another option would be to
> stick with more traditional things like LL or LR parser.  To be honest,
> I don't know enough about parsers and what useful languages they cover
> to decide.  Thoughts welcome.
> 
> Best,
> Bruno

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Software zur Erkennung von "Spam" auf dem Rechner

    h2774747.stratoserver.net

hat die eingegangene E-mail als m=F6gliche "Spam"-Nachricht identifiziert.
Die urspr=FCngliche Nachricht wurde an diesen Bericht angeh=E4ngt, so dass
Sie sie anschauen k=F6nnen (falls es doch eine legitime E-Mail ist) oder
=E4hnliche unerw=FCnschte Nachrichten in Zukunft markieren k=F6nnen.
Bei Fragen zu diesem Vorgang wenden Sie sich bitte an

    @@CONTACT_ADDRESS@@

Vorschau: I have *no* idea about parsers. I just rewrote the letter-by-lett=
er
   parser of PGF because I felt a few options missing (and the implementati=
on
   is nowhere near as powerful as it could be) when I heard [...]=20

Inhaltsanalyse im Detail:   (6.1 Punkte, 5.0 ben=F6tigt)

Pkte Regelname              Beschreibung
---- ---------------------- -----------------------------------------------=
---
 2.8 FROM_STARTS_WITH_NUMS  Absenderadresse beginnt mit Ziffern im
                            Benutzernamen
 0.0 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level
                            mail domains are different
 0.0 FREEMAIL_FROM          Sender email is commonly abused enduser mail
                            provider (rainer.schoepf[at]web.de)
                            (dzajw[at]yandex.com)
                            (rainer.schoepf[at]web.de)
                            (petstep[at]web.de)
                            (rainer.schoepf[at]web.de)
                            (petstep[at]web.de) (eaxtljsax[at]aol.com)
                             (yanglatex2e[at]gmail.com)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]web.de)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
                            (ziegenhagen[at]gmail.com)
                            (rainer.schoepf[at]web.de)
                            (klaus.hoeppner[at]gmx.de)
                            (weyhofen1[at]gmx.de)
                            (ziegenhagen[at]gmail.com)
                            (ziegenhagen[at]gmail.com)
                            (ziegenhagen[at]gmail.com)
                            (ziegenhagen[at]gmail.com)
                            (keineantwortadresse[at]web.de)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
                            (ellen.stark[at]web.de)
                            (ellen.stark[at]web.de)
                            (petstep[at]web.de)
                            (rainer.schoepf[at]web.de)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]web.de)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
                            (agentexport5[at]gmail.com)
                            (petstep[at]web.de) (petstep[at]web.de)
                            (rainer.schoepf[at]gmx.net)
                            (petstep[at]web.de)
                            (rainer.schoepf[at]web.de)
                            (rainer.schoepf[at]web.de)
                            (rainer.schoepf[at]web.de)
                            (yanglatex2e[at]gmail.com)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]web.de)
                            (rainer.schoepf[at]gmx.net)
                            (phe.h.o1[at]gmail.com)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]web.de)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
                            (rainer.schoepf[at]gmx.net)
 3.1 NO_RDNS_DOTCOM_HELO    HELO-Identifikation als gro=DFer Provider,
                            aber rDNS-Name inkorrekt
 0.1 FREEMAIL_FORGED_FROMDOMAIN 2nd level domains in From and
                            EnvelopeFrom freemail headers are
                            different


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