On Tue, 04 Nov 2008 19:41:58 +0900, Duncan Coutts <[EMAIL PROTECTED]> wrote: >> >> 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) -> ...) > > David is right. If the exit code handler throws a pattern match > exception then the code behaves differently than the `catches` version.
I see. I misunderstood the problem. Thanks, -- shelarcy <shelarcy hotmail.co.jp> http://page.freett.com/shelarcy/ _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
