On Fri, Feb 03, 2006 at 09:54:59AM +1100, Patryk Zadarnowski wrote:
On 03/02/2006, at 9:25 AM, Wolfgang Jeltsch wrote:
Am Mittwoch, 1. Februar 2006 01:32 schrieb Patryk Zadarnowski:
[...]
The proposal would be to remove the unary "-" altogether, and, instead, extend the lexical syntax of numeric constant to allow "+" and "-" prefix.
Would this mean that (-x) is a section while (-1) isn't? That would be confusing.
Apart from this, I would like to see the only unary operator of Haskell removed.
Yes, it *would* mean that (-x) and (- 1) are sections while (-1) isn't, and yes, that would be slightly confusing (and a good compiler might want to issue a warning whenever it sees a construct of the form (-identifier).
I'd much prefer it gave a warning for (-1) as, with -1 being a single lexeme, parentheses would never be needed.
In both cases, accidentally omitting a space will result in a compiler or type error anyway, since (-x) has a different type than (- x), so such accidents
Do you mean (-1) and (- 1) here? Thanks Ian, in support of this proposal