The top-level Marpa page shows precedence written w/o using Marpa's explicity precedenced statements: http://search.cpan.org/~jkegl/Marpa-R2-3.000000/pod/Marpa_R2.pod
To report errors, you have to track where the rewritten statements came from, and report the error in terms of alternatives in the user's original statements. Hope this helps, jeffrey On Tue, Dec 20, 2016 at 12:04 PM, Ian Tegebo <[email protected]> wrote: > In reading "Precedence parsing made simpler" [1], I went to look for how > to rewrite a grammar "into an 'order-explicit grammar'". I haven't had any > luck finding a satisfying explanation. Any pointers? That said, I'm > curious about Marpa's particular approach - would someone be kind enough to > point me to code/docs/papers? > > For context, I've been implementing an Earley parser for educational > purposes. I'm wondering how to deal with associativity and precedence. > While rewriting the grammar apparently does the job, I wonder how one > reports a syntax error. I'd prefer to point to a grammar rule, but once > the grammar is rewritten it may not make sense to the user. > > [1] http://jeffreykegler.github.io/Ocean-of-Awareness- > blog/individual/2012/08/precedence-parsing-made-simpler.html > > -- > You received this message because you are subscribed to the Google Groups > "marpa parser" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "marpa parser" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
