Hi-

The Programatica project at OGI is building a Haskell-in-Haskell specification, which is freely available.
It isn't complete as yet, but large parts of it are: a front-end, an executable specification of the module
system, and an interpreter for a large subset of Haskell98. Check out the Programatica website for further
details:
http://www.cse.ogi.edu/PacSoft/projects/programatica/default.htm

The interpreter is available from my webpage (as is the paper "Fine Control of Demand in Haskell" describing it):
http://www.cse.ogi.edu/~wlh/index.html

Cheers, Bill

Message: 1
Date: Thu, 19 Dec 2002 21:39:56 -0800 (PST)
From: David Sankel <[EMAIL PROTECTED]>
Subject: Interpret haskell within haskell.
To: [EMAIL PROTECTED]

I was wondering if there is any project that aims to
interpret haskell within haskell.

Is it feasable that a program can import a user's .hs
file that has something like:

greeting :: String
greeting = "Something"

port :: Int
port = 32 + 33

And the program can parse and execute the user's
function.

I'm looking for something similar to the eval command
in Python.

Thanks,

David J. Sankel

--__--__--

Message: 2
Subject: RE: Interpret haskell within haskell.
Date: Fri, 20 Dec 2002 10:04:39 -0000
From: "Simon Marlow" <[EMAIL PROTECTED]>
To: "David Sankel" <[EMAIL PROTECTED]>, <[EMAIL PROTECTED]>

> I was wondering if there is any project that aims to
> interpret haskell within haskell.
>=20
> Is it feasable that a program can import a user's .hs
> file that has something like:
>=20
> greeting :: String
> greeting =3D "Something"
>=20
> port :: Int
> port =3D 32 + 33
>=20
> And the program can parse and execute the user's
> function.
>=20
> I'm looking for something similar to the eval command
> in Python.

You could potentially do this with GHCi, but we haven't tried.  The idea
is that you would need to expose parts of GHCi itself as a library which
can be used from the program.  Linking is a bit tricky (you don't want
to load another copy of GHCi), but we know one way to get around that:
the --export-dynamic flag to ld.

If you're interested in having a go, come on over to
[EMAIL PROTECTED] and we'll help out with any problems
you run into.

Cheers,
        Simon


--__--__--

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