[augeas-devel] Re: [Augeas] bbwarnrules.aug

[Raphaël Pinson]

On Fri, Jul 11, 2008 at 12:41 AM, David Lutterkort <lutter at watzmann.net>
wrote:

> On Thu, 2008-07-10 at 12:33 +0200, Raphaël Pinson wrote:
> > I'm trying to work on the following file, but I get :
> >
> > bbwarnrules.aug:45.4-.43:Failed to compile lns
> > bbwarnrules.aug:45.14-.43:exception: ambiguous tree iteration
> >       'host/host/' can be split into
> >       'host/|=|host/'
> >
> >      and
> >       'host/host/|=|'
> >
> >     Iterated lens: bbwarnrules.aug:45.16-.40
> >
> > bbwarnrules.aug: error: Loading failed
>
> The error message says 'If I see a tree that has two "host" nodes next
> to each other, I get confused' (note that it says 'tree iteration') -
> this error message is about the 'put' direction from tree back to the
> file.
>
> >     let record  = notmark? .
> >                        host . ( sep_spc . host )*                    .
> > semi_col .
> >                        ([ label "exhosts"    . value_to_semi_col ])? .
> > semi_col .
> >                        ([ label "services"   . value_to_semi_col ])? .
> > semi_col .
> >                        ([ label "exservices" . value_to_semi_col ])? .
> > semi_col .
> >                        ([ label "day"        . value_to_semi_col ])? .
> > semi_col .
> >                        ([ label "time"       . value_to_semi_col ])? .
> > semi_col .
> >                        ([ label "recipients" . value_to_eol      ])?
> >                   . eol_no_spc
> >
> >     (* Define lens *)
> >
> >     let lns = ( comment | empty | record )*
>
> The problem is that a tree with two adjacent host nodes can either be
> processed as one 'record' that has two hosts or as two 'record'
> instances with one host each, i.e. in the first case the correct output
> would be
>        host1 host2
> whereas in the second, the correct output would be
>        host1
>        host2
> (since record ends with a eol_no_spc)




What I don't really get is that I think I specify a record as something that
looks like
! myhost;a;b;c;d;e;f

or

myhost;a;b;c;d;e;f

as in, there _must_ be semi-colons on each record line, so a line like
'host/host/' is just not possible in this lens. Am I missing something to
specify this ?



Raphaël
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/augeas-devel/attachments/20080711/92218939/attachment.htm>