I think actually belongs under the "LTA error message" category.
On 8/3/15, mt1957 <mt1...@gmail.com> wrote:
> Hi,
>
> I there a way to prevent some type of mistake I now have made several
> times merely because the error messages are not helping me to point to
> the problem.
>
> Example;
>
> grammar Turtle::Grammar {
> rule TOP { <statement>* }
>
> ...
>
> rule directive { <prefix-id> | <base> }
>
> ...
>
> rule base {
> '@base'<white-space>* <uri-ref>
> }
>
> ...
>
> For this piece of grammar I get the message something like;
>
> Too many positionals passed; expected 1 argument but got 2
> in regex base at
> /home/marcel/Languages/Perl6/Projects/Rdf/lib/Rdf/Turtle/Grammar.pm6:41
>
> So what would that mean???? Only after some while I remembered that
> there is a base() method which gets called here and I needed to change
> the targets from base to e.g. base-id. After that all went fine.
>
> I had this once before where I had declared a whitespace target <ws>
> which is already defined. Also with strange results.
>
> Somehow there must be a way to test when there is a redefinition of
> sorts going on.
>
> Greetings,
> Marcel
>
>
>
