-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Neil Mitchell wrote:
Hi
Anyone want the -underscore flag to stick around, and not just be the default which can't be turned off?
It depends whether you want to claim Haskell'98 compatibility or not. Haskell-prime is likely to make yhc's default behaviour with underscores the new standard however.
Can anyone outline exactly which behaviour is which? What the differences are? Is one behaviour a superset of the other? Are there any incompatabilities?
H'98: underscore is purely considered a lowercase character (except for `_' which is basically just a keyword). This allows: _Bob :: Int; _Bob = 3 default for nhc and yhc, and a likely-to-get-in proposal for Haskell-prime, is skipping leading underscores in an identifier for the purpose of determining case. This allows: type _Bob = Int Each example would be a syntax error in the other underscore-treatment. It makes no difference except for identifiers that start with underscores not followed by a lowercase letter. The proposed/nhc/yhc default behavior is useful because leading underscore also signifies "unused", which should be possible to do even for type/constructor/class names. Isaac -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFP8iUHgcxvIWYTTURApsiAJ4jNBFY4Oth5hUmOPyR3XdNmoMc1QCguce2 Q+JzdoEObQ6h9snlKAo0MYM= =+IZU -----END PGP SIGNATURE-----