From: Ryan Davis <ryand-ruby@...>
Date: 2009-05-30T06:30:26+09:00
Subject: [ruby-core:23627] Re: AST changes in ruby 1.8.6-p368


On May 26, 2009, at 08:11 , Michael Furr wrote:

>
> On Tue, 26 May 2009, Nobuyoshi Nakada wrote:
>
>> At Tue, 26 May 2009 07:30:49 +0900,
>> Ryan Davis wrote in [ruby-core:23558]:
>>>> failed on input: "if 1..2.a?(b) then\n  nil\nend".
> [...]
>>>>  [:call, [:lit, 1], :==, [:array, [:gvar, :$.]]],
>>> is the '== $.' part only if range begin is a lit/fixnum?
>>
>> Yes.
>
> Would you mind explaining the purpose of this extra method call?  
> Wouldn't $. be 3 in this case (the last line number parsed) causing  
> Fixnum#== to return false and thus creating an incorrect Range  
> literal?

[:gvar, :$.], not [:gvar, $.]

so it'll be expanded at runtime, not at parse-time.

(I hope I understood your question and answered it properly)