On Sunday, December 26, Paul Procacci wrote:
>
> use Grammar::Tracer;
>
> and
>
> use Grammar::Tracer::Compact;
>
> Both I've found helpful, though obviously not fool proof. It'd be nice if
> it show'd why it failed (i.e. what it encountered vs what it expected )
> rather than just a 'failed'.
For what it's worth, you may also like Grammar::PrettyErrors --
Adding this to the definition :
grammar myTest does Grammar::PrettyErrors {
and then trying to parse the input, yields
--errors--
2 │ {
3 │ a = "bi";
4 │▶ b = "hi";
^
5 │ }
Uh oh, something went wrong around line 4.
Unable to parse object.
in block <unit> at grammar.raku line 40
So -- you get the position, and the rule where
it failed ("object").
Brian
