cascading if conditions

Newsgroups	comp.lang.haskell
Subject	cascading if conditions
From	blufox <blufox@gmail.com>
Message-ID	<op.wfzcfp2bazwite@akasham> (permalink)
Organization	TeraNews.com
Date	2012-06-15 22:05 -0700

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Hello,
   I have a set of if conditions of this form,

   case fna of
     Just x -> x
     Nothing -> case fnb of
        Just y -> y
        Nothing -> case fnc of
           Just z -> z
           Nothing -> defaltval

Is there a standard way to capture this pattern?

Regards,
blufox

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cascading if conditions blufox <blufox@gmail.com> - 2012-06-15 22:05 -0700
  Re: cascading if conditions Paul Rubin <no.email@nospam.invalid> - 2012-06-15 23:23 -0700
    Re: cascading if conditions blufox <blufox@gmail.com> - 2012-06-15 23:31 -0700
    Re: cascading if conditions usenet@mkarcher.dialup.fu-berlin.de (Michael Karcher) - 2012-06-16 17:23 +0000
      Re: cascading if conditions Paul Rubin <no.email@nospam.invalid> - 2012-06-16 10:32 -0700
        Re: cascading if conditions Paul Rubin <no.email@nospam.invalid> - 2012-06-16 11:43 -0700
      Re: cascading if conditions blufox <blufox@gmail.com> - 2012-06-16 22:27 -0700
  Re: cascading if conditions chb hemma <chb@home.se> - 2012-06-24 23:36 +0200

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