[Haskell-cafe] Is there already a lib to parse a line of string with a pattern and generate key-value map or a record?

[Magicloud Magiclouds]

scanf looks interesting. Closer to my case. Thanks.

Neil, the formation looks OK in GMail. The lib gives me some other
thoughts. Thanks.

On Wed, Apr 17, 2019 at 11:24 PM Frank Dedden <frank at dedden.net> wrote:
>
> I think you're looking for a scanf (well known in C) like function. A quick
> search give me:
> https://hackage.haskell.org/package/scanf
> https://hackage.haskell.org/package/xformat
>
> I haven't used either of them, so I can't recommend one.
>
> Regards,
> Frank Dedden
>
> On Wed, Apr 17, 2019 at 10:32:07PM +0800, Magicloud Magiclouds wrote:
> > Thanks. I am familiar with this kind of usage (attoparsec). But it is
> > still somehow complex and not flexible.
> >
> > Let me see what Frame can do.
> >
> > On Wed, Apr 17, 2019 at 9:46 PM Станислав Черничкин
> > <schernichkin at gmail.com> wrote:
> > >
> > > I think specific formats can be parsed with attoparsec (Data.Attoparsec.Text):
> > >
> > > p = do
> > >    year <- yearP
> > >    char '/'
> > >    month <- monthP
> > >    char '/'
> > >    ....
> > >    return (year, month, ...)
> > >
> > > You may also use cassava to parse csv-like files, or Frames for type-safe parsing. With Frames you may custom readers ( http://acowley.github.io/Frames/#orgfa57664 ) with complex pattern-matching, this will require typing skills though.
> > >
> > > ср, 17 апр. 2019 г. в 12:30, Magicloud Magiclouds <magicloud.magiclouds at gmail.com>:
> > >>
> > >> Hi,
> > >>
> > >> I saw this function in some web tools, pretty useful when parsing log
> > >> or so. So I wonder if Haskell has similar libs already.
> > >>
> > >> Sample:
> > >>
> > >> Input line: "2019/04/17 17:27 User magicloud runs command ls."
> > >>
> > >> Pattern: "${year}/${month}/${day} ${hour}:${minute} User ${username}
> > >> runs command ${command}."
> > >>
> > >> Output: toList [ ("year", "2019"), ("month", "04") , etc ]
> > >>
> > >> --
> > >> 竹密岂妨流水过
> > >> 山高哪阻野云飞
> > >>
> > >> And for G+, please use magiclouds#gmail.com.
> > >> _______________________________________________
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> > >
> > >
> > >
> > > --
> > > Sincerely, Stanislav Chernichkin.
> >
> >
> >
> > --
> > 竹密岂妨流水过
> > 山高哪阻野云飞
> >
> > And for G+, please use magiclouds#gmail.com.
> > _______________________________________________
> > Haskell-Cafe mailing list
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-- 
竹密岂妨流水过
山高哪阻野云飞

And for G+, please use magiclouds#gmail.com.