25 Jul
2007
25 Jul
'07
1:55 p.m.
On Wed, Jul 25, 2007 at 09:35:38PM +0400, Bulat Ziganshin wrote:
Hello Jon,
Wednesday, July 25, 2007, 8:07:57 PM, you wrote:
Q: how to see operators precedence in GHCi? In the definition of `it': it = showParen $ (2 + (3 * 4))
Hmm, OK, but not that much quicker than going Prelude> :info (*)
it just my poor english :) i mean - "how to see how Haskell will parse some expression?". it will be too slow to look up each precedence and parse expression by hand :)
Much easier: stefan@stefans:~$ ghci GHCi, version 6.7.20070712: http://www.haskell.org/ghc/ :? for help Loading package base ... linking ... done. Prelude> :set -ddump-parsed Prelude> 2 + 3 * 4 ==================== Parser ==================== Just (2 + 3) * 4 14 Prelude> Stefan