From: Shannon Fang <xrfang@...>
Date: 2005-10-28T12:27:41+09:00
Subject: Expression Evaluation Problem

Hi,

I have a program which runs ok for a very long time, today I try to modify 
it some strange error pops up (before I modify):

c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:18:in `require__': 
./dbload.rb:110: void value expression (SyntaxError)
    return (@acc.class == Hash) and (@auth.class == Hash) and (@cat.class == 
Hash)
                                                             ^  from 
c:/ruby/lib
/ruby/site_ruby/1.8/rubygems/custom_require.rb:18:in `require'
        from F:/work/svn/dproc/dproc.rb:5

The problematic source codes are as follow:

dproc.rb:

require 'something'
require 'dbload'

... ...

dbload:
... ...
  def loaded?
    return (@acc.class == Hash) and (@auth.class == Hash) and (@cat.class == 
Hash)
  end
... ...

Now I add a () in the loaded? function make it like:

  return ((@acc.class == Hash) and (@auth.class == Hash) and (@cat.class == 
Hash))

The error disappeared!

My question is, which operator has higher priority? return or and?

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

Thank you!
Shannon