From: daz <dooby@...10.karoo.co.uk>
Date: 2005-10-28T13:37:03+09:00
Subject: Re: Expression Evaluation Problem


Shannon Fang wrote:
> [...]
> My question is, which operator has higher priority? return or and?
>


/return/ and /and/ are both keywords

  return 1 and 2
     parses as:
  return(1) and 2  # void expression error

The return keyword isn't necessary (as you know) -
- without it there's no conflict.

/&&/ operator has a higher priority than /and/


def loaded?
   print "#$c : "
   case $c
    when 0: # return 1 and 2    # err #-> 0 : nil
    when 1: # return(1) and 2  # err #-> 1 : nil
    when 2: return(1 and 2)     #-> 2 : 2
    when 3: return 1 && 2       #-> 3 : 2
    when 4: 1 and 2             #-> 4 : 2
    when 5: 1 && 2              #-> 5 : 2
   end
end

6.times {|$c| p loaded? }


> I have used this code for a long time, but never had this problem before...
> Any change in v1.8 probably?
>

I think, if it ever worked, you were lucky ;)

daz