From: Gaspard Bucher <gaspard@...>
Date: 2008-05-14T16:27:59+09:00
Subject: Re: disable regexp warning

This is crazy. When I write a simple test case with your example it
works just fine but I still get this message when running all the
tests:
/lib/parser/test/../lib/rules/zena.rb:231: warning: regexp has invalid interval
./lib/parser/test/../lib/rules/zena.rb:231: warning: regexp has `}'
without escape
compiled-template:1: warning: regexp has invalid interval
compiled-template:1: warning: regexp has `}' without escape

This message does not come from the simple test I wrote but from this test:
ruby test/helpers/zena_parser_test.rb --name test_basic_show_mean_gsub

[edit] Ok, I found the problem:

  def test_bad_regexp
    assert_equal "<span class='parser_error'>invalid regexp \"# {puts
'I AM MEAN'}\"", validate_regexp("# {puts 'I AM MEAN'}")
  end

  private
    def validate_regexp(str)
      begin
       re = /#{str}/
      rescue => e
       # invalid regexp
       "<span class='parser_error'>invalid regexp #{str.inspect}</span>"
      end
    end

The regexp is seen as valid even though it is not. It's the actual run
of the regexp in a gsub that prints the error message.

Is there a way to detect this error ?

Thanks for your help.

Gaspard


Here is the code in place:
http://dev.zenadmin.org/browser/trunk/lib/parser/lib/rules/zena.rb#L231

On Tue, May 13, 2008 at 3:44 PM, Florian Gilcher <flo@andersground.net> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
>  Hash: SHA1
>
>  I don't see your problem.
>
>  ===
>  def test
>   str = "a*("
>
>   begin
>     re = /#{str}/
>   rescue RegexpError => e
>     # invalid regexp
>     "<span class='parser_error'>invalid regexp #{str.inspect}:
> #{e.message}</span>"
>   end
>  end
>
>  puts test.inspect
>  ===
>
>  doesn't print any errors. I double checked that warnings are on and the
> warning level was set to highest.
>
>  If it does not work with your ruby version, please post the version string
> of you ruby installation (obtained by "ruby -v").
>
>  Regards,
>  Florian Gilcher
>
>
>
>  On May 13, 2008, at 3:08 PM, Gaspard Bucher wrote:
>
>
> > Hi there !
> >
> > Is there a way to disable regexp warning ?
> >
> > I want to do this:
> >
> > begin
> >  re = /#{str}/
> > rescue
> >  # invalid regexp
> >  return "<span class='parser_error'>invalid regexp #{str.inspect}</span>"
> > end
> >
> > without having tons of messages printed on stderr. Any clue ?
> >
> > Thanks,
> >
> > Gaspard
> >
> >
>
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