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how to hack on pugs in ghci? how to use perl6 regexen and grammars in haskell?

by tphyahoo (Vicar)
on Mar 15, 2009 at 18:48 UTC ( #750768=perlquestion: print w/replies, xml ) Need Help??
tphyahoo has asked for the wisdom of the Perl Monks concerning the following question:

I asked this question long ago at can you use perl6 from haskell?

and am asking again now because pugs is now available with cabal install and I am wondering if this changes anything.

I don't even see the option for "make ghci" target anymore (as educated_foo suggested).

Specifically, I would like to be able to do

ghci Main.hs (in pugs distro) or perhaps ghci Pugs.hs and just poke around and see how pugs works.

Currently, this fails with

thartman@ubuntu:~/haskellInstalls/Pugs-6.2.13.14/src>ghci Main.hs

Pugs/Prim/Match.hs:12:7: Could not find module `Paths_Pugs': Use -v to see a list of the files searched for. Failed, modules loaded: none. Prelude> :q
when I attempt to run the ghci command in the unzipped Pugs-6 distro directory copied from where cabal installed it.

UPDATE: Checked out the svn head from http://www.perlfoundation.org/perl6/index.cgi?download_pugs

and this has a lot more files than the contents of the cabal tar, including an INSTALL file in the top dir that says there should be a make ghci target for hacking in ghci.

However,

thartman@ubuntu:~/haskellInstalls/pugs>make ghci make: *** No rule to make target `ghci'. Stop.

Also, crossposted this question to perl6-compiler mailing list. (google "Is there a reasonable way to access perl 6 regexen and grammars in haskell, via the pugs modules? (where's the make ghci target?)")

Replies are listed 'Best First'.
Re: how to hack on pugs in ghci? how to use perl6 regexen and grammars in haskell?
by grinder (Bishop) on Mar 15, 2009 at 20:36 UTC
    ...asking again now because pugs is now available

    I could be wrong about this, so feel free to correct me, but my understanding is that Pugs is a dead project. Already the Perl 6 spec has moved some considerable distance from what Pugs was targetting at the time (circa 2006-2007).

    If you are a black belt über Haskell programmer of the seventeenth dan, then you should be able to figure out what's going wrong anyway. If you want to poke around at a decent Perl 6 implementation, then you ought to be looking at Rakudo.

    • another intruder with the mooring in the heart of the Perl

      The thing is, haskell could really use =~ s/../../ Parsec is great and all, but sometimes you just want to do the easy thing, especially if you're coming from perl. Since pugs exists, I can't help this feeling that I'm tantalizingly close...
Re: how to hack on pugs in ghci?
by tphyahoo (Vicar) on Mar 15, 2009 at 19:12 UTC
    seems a solution is here: http://neilmitchell.blogspot.com/2008/02/adding-data-files-using-cabal.html
      This was a partial solution: it got me past the missing datafile problem. However, now I have another error:

      During interactive linking, GHCi couldn't find the following symbol: text__prelude_pm This may be due to you not asking GHCi to load extra object files, arc +hives or DLLs needed by your current session. Restart GHCi, specifyi +ng the missing library using the -L/path/to/object/dir and -lmissingl +ibname flags, or simply by naming the relevant files on the GHCi comm +and line. Alternatively, this link failure might indicate a bug in GH +Ci. If you suspect the latter, please send a bug report to: glasgow-h +askell-bugs@haskell.org
        dev.pugscode.org/browser will show activity in the pugs subversion tree- it's generally busy since that's where the specs and tests live. But drilling into the src/Pugs directory shows it's pretty quiet in there. Dead is too strong a word, quiescent is better...

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