[Caml-list] PCRE: Invalid_argument("Pcre.get_offset_start: illegal offset")

[Caml-list] PCRE: Invalid_argument("Pcre.get_offset_start: illegal offset")

[oliver]

Hello,

I could not find a description in the PCRE-documentation,
where this error comes from.

This does occur on my call to get_substring,
but get_substring has documented exceptions,
in case something goes wrong:

    * Invalid_argument if n is not in the range of the number of substrings.
    * Not_found if the corresponding subpattern did not capture a substring.


Any idea?


Ciao,
   Oliver

Re: [Caml-list] PCRE: Invalid_argument("Pcre.get_offset_start: illegal offset")

[oliver]

On Fri, Dec 24, 2010 at 05:03:06AM +0100, oliver@first.in-berlin.de wrote:
> Hello,
> 
> I could not find a description in the PCRE-documentation,
> where this error comes from.
> 
> This does occur on my call to get_substring,
> but get_substring has documented exceptions,
> in case something goes wrong:
> 
>     * Invalid_argument if n is not in the range of the number of substrings.
>     * Not_found if the corresponding subpattern did not capture a substring.
[...]

It seems that trying to extract more substrings than are available,
this exception is raised.

This behaviour seems not to be documented.

Ciao,
   Oliver

Re: [Caml-list] PCRE: Invalid_argument("Pcre.get_offset_start: illegal offset")

[Markus Mottl]

It is documented: the API-documentation clearly says that
Invalid_argument is going to be raised if you are trying to access a
nonexistent substring, and it is being raised here.

Regards,
Markus

On Fri, Dec 24, 2010 at 09:25,  <oliver@first.in-berlin.de> wrote:
> On Fri, Dec 24, 2010 at 05:03:06AM +0100, oliver@first.in-berlin.de wrote:
>> Hello,
>>
>> I could not find a description in the PCRE-documentation,
>> where this error comes from.
>>
>> This does occur on my call to get_substring,
>> but get_substring has documented exceptions,
>> in case something goes wrong:
>>
>>     * Invalid_argument if n is not in the range of the number of substrings.
>>     * Not_found if the corresponding subpattern did not capture a substring.
> [...]
>
> It seems that trying to extract more substrings than are available,
> this exception is raised.
>
> This behaviour seems not to be documented.
>
> Ciao,
>   Oliver
>
> --
> Caml-list mailing list.  Subscription management and archives:
> https://sympa-roc.inria.fr/wws/info/caml-list
> Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
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>
>



-- 
Markus Mottl        http://www.ocaml.info        markus.mottl@gmail.com

Re: [Caml-list] PCRE: Invalid_argument("Pcre.get_offset_start: illegal offset")

[oliver]

Hi,

yes, you are right, and I had tomatoes on my eyes...
I looked for "get_offset_start" as exception
and had Failure as thrown exception in mind,
even "Invalid_argument" is the exception,
which of course is documented ...and that I already wrote
some lines below...

It seems I had to less sleep during the last days...

Sorry for the traffic that my messed tired mind created. ;)

Ciao,
   Oliver



On Sat, Dec 25, 2010 at 03:12:55PM -0500, Markus Mottl wrote:
> It is documented: the API-documentation clearly says that
> Invalid_argument is going to be raised if you are trying to access a
> nonexistent substring, and it is being raised here.
> 
> Regards,
> Markus
> 
> On Fri, Dec 24, 2010 at 09:25,  <oliver@first.in-berlin.de> wrote:
> > On Fri, Dec 24, 2010 at 05:03:06AM +0100, oliver@first.in-berlin.de wrote:
> >> Hello,
> >>
> >> I could not find a description in the PCRE-documentation,
> >> where this error comes from.
> >>
> >> This does occur on my call to get_substring,
> >> but get_substring has documented exceptions,
> >> in case something goes wrong:
> >>
> >>     * Invalid_argument if n is not in the range of the number of substrings.
> >>     * Not_found if the corresponding subpattern did not capture a substring.
> > [...]
> >
> > It seems that trying to extract more substrings than are available,
> > this exception is raised.
> >
> > This behaviour seems not to be documented.
> >
> > Ciao,
> >   Oliver
> >
> > --
> > Caml-list mailing list.  Subscription management and archives:
> > https://sympa-roc.inria.fr/wws/info/caml-list
> > Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
> > Bug reports: http://caml.inria.fr/bin/caml-bugs
> >
> >
> 
> 
> 
> -- 
> Markus Mottl        http://www.ocaml.info        markus.mottl@gmail.com