Re: Control.Exception

3 Nov 2008

      On Tue, 04 Nov 2008 07:40:50 +0900, David Menendez  wrote:
...
...
ie:
action
 `catches`
   [ \(e :: ExitCode) -> ...
   , \(e :: PatternMatchFail) -> ...
   ]
or just by using multiple catch clauses:
action
 `catch` (\(e :: ExitCode) -> ...)
 `catch` (\(e :: PatternMatchFail) -> ...)
I don't think those are equivalent. In the second case, the
PatternMatchFail handler scopes over the ExitCode handler.
I think Duncan forgot to write parens. According to Ian's example,
here is an equivalent code.

(action
  `catch` (\(e :: ExitCode) -> ...))
  `catch` (\(e :: PatternMatchFail) -> ...)

http://www.haskell.org/pipermail/libraries/2008-July/010095.html

Best Regards,

-- 
shelarcy <shelarcy    hotmail.co.jp>
http://page.freett.com/shelarcy/