[augeas-devel] Re: Lens debug messages (Was: [Interfaces] Draft lense)

[David Lutterkort]

On Tue, 2008-08-26 at 07:45 +0200, Raphaël Pinson wrote:
> I suggested a way to improve lens debug earlier in this thread. I
> think it would be very useful if the debug message included the trees
> generated in the various situations. For example with the error given
> by Free earlier:
> 
> 
>         lenses/interfaces.aug:27.3-.
>         65:Failed to compile auto
>         lenses/interfaces.aug:27.19-.63:exception: ambiguous
>         concatenation
>              'auto\\\nA# A\n' can be split into
>              'auto\\\nA|=|# A\n'
>         
>             and
>              'auto\\\nA# A|=|\n'
>         
>         
>            First lens: lenses/interfaces.aug:21.37-.100
>            Second lens: lenses/interfaces.aug:27.50-.62
> 
> 
> it could say (or I'm guessing it could):
> 
> 
> lens/interfaces.aug:27.3-.65:Failed to compile auto
> lenses/interfaces.aug:27.19-.63:exception: ambiguous concatenation
>     The string 'auto\\\nA# A\n' can be split into
>     'auto\\\nA|=|# A\n' generating the tree
> { "auto"
>    { "1" = "A"
>       { "comment" = "A" } } }
> 
>     
>    and
>     'auto\\\nA# A|=|\n' generating the tree
>           { "auto"
>              { "1" = "A# A" } }
>        First lens: lenses/interfaces.aug:21.37-.100
>        Second lens: lenses/interfaces.aug:27.50-.62
> 
> 
> This would make it much clearer already imo.

Hmm .. it would involve a bit of work, but would probably be doable. Is
the issue then mostly with tracing back what the first and second lens
in the error message are all about ?

David