From: Brian Candler <b.candler@...>
Date: 2010-08-26T23:39:05+09:00
Subject: Re: #attr back to 1.8.6 an older behavior?

Thomas Sawyer wrote:
> What happened to dropping the optional true/false parameter from #attr
> in 1.9? About a year or so ago, the method was changed to support
> multiple symbols, and if you wanted a writer you just add one with an
> '=' on the end, e.g.
> 
>   attr :x, :x=

FWIW, it looks like 1.9.1 doesn't allow attr :x= anyway (reader 
attributes only)

irb(main):001:0> class Foo
irb(main):002:1> attr :x, :x=
irb(main):003:1> end
NameError: invalid attribute name `x='
  from (irb):2:in `attr'
  from (irb):2:in `<class:Foo>'
  from (irb):1
  from /usr/local/bin/irb191:12:in `<main>'
irb(main):004:0> RUBY_DESCRIPTION
=> "ruby 1.9.1p429 (2010-07-02 revision 28523) [x86_64-linux]"
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