From: Jens Wille <jens.wille@...>
Date: 2008-05-08T04:51:17+09:00
Subject: Re: precedence of single-line rescue and assignment

Albert Schlef [2008-05-07 21:27]:
> matt neuburg wrote:
>> [...] since the above can be fixed using parentheses:
>> 
>> y += (boom rescue "fine")
> 
> But if `y += boom rescue "fine"` indeed translates into `y +=
> (boom rescue "fine")` that still doesn't solve the mystery.
no, it evaluates to '(y += boom) rescue "fine"'. the '+=' binds
tighter than/takes precedence over 'rescue'.

  def boom; p 'boom'; raise 'boom'; end
=>nil
  def fine; p 'fine'; 'fine'; end
=>nil
  y = ''
=>""
  y += boom rescue fine
"boom"
"fine"
=>"fine"
  y
=>""
  (y += boom) rescue fine
"boom"
"fine"
=>"fine"
  y
=>""
  y += (boom rescue fine)
"boom"
"fine"
=>"fine"
  y
=>"fine"

cheers
jens

-- 
Jens Wille, Dipl.-Bibl. (FH)
prometheus - Das verteilte digitale Bildarchiv f端r Forschung & Lehre
Kunsthistorisches Institut der Universit辰t zu K旦ln
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Tel.: +49 (0)221 470-6668, E-Mail: jens.wille@uni-koeln.de
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