From: Joel VanderWerf <vjoel@...>
Date: 2003-06-13T04:45:46+09:00
Subject: Re: src/yaml.y.rb:210: warning: ambiguous first argument; make sure

ahoward wrote:
> 
> any one get this error when running with '-w'?
> 
> took a peek in the file - but there are some bizarre goings on in there:
> 
> module_eval <<'.,.,', 'src/yaml.y.rb', 81
>   def _reduce_27( val, _values, result )
>     result = new_node( 'seq', val[1] )
>     result
>   end
> ..,.,
> 
> looks like some heredocs and...  what?  can anyone explain this syntax - looks
> like C preprocessor stuff?

As it happens, I was just looking at something like that in a 
racc-generated parser class. The

   'src/yaml.y.rb', 81

are extra information about the file and line from which racc generated 
this bit of code. It's used in error reporting.

The '.,.,' is just a creative version of 'END', AFAICT. But it looks 
like your file has an extra '.' at the beginning of the last line. Did 
racc put that there?