[MacRuby-devel] Method calls with variable unnamed arguments after the pseudo-hash part of the selector

[Laurent Sansonetti]

Hi Caio,

You seem to have found a bug in the parser :) Could you file that as a ticket?

Thanks,
Laurent

On Oct 10, 2010, at 11:46 AM, Caio Chassot wrote:

> I'm playing again with implementing the Hillegass book in MacRuby, and ran across this method:
> 
>    + (NSAlert *)alertWithMessageText:(NSString *)messageTitle
>                        defaultButton:(NSString *)defaultButtonTitle
>                      alternateButton:(NSString *)alternateButtonTitle
>                          otherButton:(NSString *)otherButtonTitle              
>            informativeTextWithFormat:(NSString *)informativeText, ...
> 
>    (http://bit.ly/d1JIeQ)
> 
> Now, the interesting part here is the ", ..." at the end. It takes variable arguments at the end that work as formatting arguments for informativeText, eg. sprintf(informativeText, ...).
> 
> In MacRuby, this is invalid syntax:
> 
>    NSAlert.alertWithMessageText("Delete?",
>                   defaultButton:"Delete",
>                 alternateButton:"Cancel",
>                     otherButton:nil,
>       informativeTextWithFormat:"delete %d people?",
>                                  employees.count)
> 
> 
> Surely, in this case it can be worked around with:
> 
>    NSAlert.alertWithMessageText("Delete?",
>                   defaultButton:"Delete",
>                 alternateButton:"Cancel",
>                     otherButton:nil,
>       informativeTextWithFormat:"delete #{employees.count} people?")
> 
> And I can also call it as:
> 
>    NSAlert.send(
>      :"alertWithMessageText:defaultButton:alternateButton:otherButton:informativeTextWithFormat:",
>      "Delete?", "Delete", "Cancel", nil, "delete %@ people?", employees.count)
> 
> but I was wondering if this is a known limitation in MacRuby's method call syntax.
> 
> So, is it known? Is there a plan to do anything about it?
> 
> _______________________________________________
> MacRuby-devel mailing list
> MacRuby-devel at lists.macosforge.org
> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.macosforge.org/pipermail/macruby-devel/attachments/20101010/0fbcf477/attachment.html>