From: David Jacobs <developer@...>
Date: 2011-03-06T16:09:50+09:00
Subject: Re: What does "ARGF.class" mean?

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From the source code, I see this:

#define argf_of(obj) (*(struct argf *)DATA_PTR(obj))
#define ARGF argf_of(argf)


# ... ... later on

/*
* Hack to get rdoc to regard ARGF as a class:
* rb_cARGF = rb_define_class("ARGF", rb_cObject);
*/
rb_cARGF = rb_class_new(rb_cObject);
rb_set_class_path(rb_cARGF, rb_cObject, "ARGF.class");
rb_define_alloc_func(rb_cARGF, argf_alloc);

That's not a definitive answer, but it does look like the implementers are aware that some of ARGF's edges are hacks.

On Sunday, 6 March 2011 at 1:56 am, Joey Zhou wrote: 
> ruby 1.9.2p180 (2011-02-18) [i386-mingw32]
> 
> irb(main):001:0> ARGF.class
> => ARGF.class
> 
> What does "ARGF.class" mean? Isn't ARGF a special IO object, whose class
> is "IO", just like STDIN?
> 
> irb(main):002:0> STDIN.class
> => IO
> 
> -- 
> Posted via http://www.ruby-forum.com/.
> 

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