[Rock-dev] oroinspect not creating an yml configuration, bugg or misusage

Sylvain Joyeux sylvain.joyeux at dfki.de
Thu Sep 8 18:34:43 CEST 2011


On 09/08/2011 03:55 PM, Matthias Goldhoorn wrote:
> i think i found the reason:
>
> tools/orocos.rb/bin/oroinspect
>  41     opt.on('--save FILE:SECTION', 'saves the task default 
> configuration in the specified file. If a file is a directory, an 
> automatic name will be gen
>  42         if save_configuration_ =~ /:(\w+)$/
>  43             save_configuration = [$`, $1]
>  44         else
>  45             save_configuration = [save_configuration_]
>  46         end
>  47     end
Yep. I had a look.

The problem is a horrible behaviour of ruby 1.9 w.r.t. block arguments.

The situation is as follows:

   * in ruby 1.8, a block that references a local variable that has the 
same name that one from its parent scope actually *does* get a reference 
on the parent variable
   * in ruby 1.9, *the plan* was to make all block local variables 
private, and allow the programmer to select which ones are shared (which 
would be a very good thing).
   * in ruby 1.9, for backward compatibility reasons, the actual 
behaviour is the one from 1.8 EXCEPT for block arguments that have the 
same name than parent scope's local variable (this case).

-- 
Sylvain Joyeux
Space&  Security Robotics

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