Ken Shan writes:

--a8Wt8u1KmwUX3Y2C Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable

Hello,

In Haskell, backquotes can be used to convert individual identifiers into infix operators, but not complex expressions. For example,

[1,2,3] `zip` [4,5,6]

is OK, but not

[1,2,3] `zipWith (+)` [4,5,6]

Is there any reason other than potential confusion when one of the two backquotes is accidentally omitted?

In any case, perhaps some people on this mailing list would appreciate the following implementation of "infix expressions" that Dylan Thurston and I came up with -- as algebraic and perverse as we could manage:

infixr 0 -:, :- data Infix f y =3D f :- y x -:f:- y =3D x `f` y

main =3D print $ [1,2,3] -: zipWith (+) :- [4,5,6]

This is a funny tricks. Does some people know other kind of tricks (possibly in other functionnal langage) ?

--=20 Edit this signature at http://www.digitas.harvard.edu/cgi-bin/ken/sig The trick is that there is no trick.

--a8Wt8u1KmwUX3Y2C Content-Type: application/pgp-signature Content-Disposition: inline

-----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.7 (GNU/Linux)

iD8DBQE9RZgzzjAc4f+uuBURAjl6AKCQmYb0HJvk2VicBlRD6zRX9VfRRgCg9F2B YPXu07Uqrz8pj2iUt+HVM3U= =WjJq -----END PGP SIGNATURE-----

--a8Wt8u1KmwUX3Y2C-- _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe

-- Yoann Padioleau, INSA de Rennes, France, Opinions expressed here are only mine. Je n'écris qu'à titre personnel. **____ Get Free. Be Smart. Simply use Linux and Free Software. ____**