Yes, nice alternative. I am using this in a framework on any BNF to automatically fill structures on-demand -;
https://github.com/jddurand/MarpaX-Role-Parameterized-ResourceIdentifier/blob/master/lib/MarpaX/Role/Parameterized/ResourceIdentifier/BNF.pm#L699 Le vendredi 27 novembre 2015 09:41:52 UTC+1, Cev Ing a écrit : > > > Am Donnerstag, 26. November 2015 23:53:26 UTC+1 schrieb Jeffrey Kegler: >> >> The LHS is available to an action via context variables >> <http://search.cpan.org/~jkegl/Marpa-R2-3.000000/pod/Semantics.pod#Action_context>. >> >> So you could write your own dispatcher and either make it the default >> action or apply it selectively. >> > > Thanks. This action helps me getting warm with Marpa actions: > > sub lhs { > my ($lhs) = map { > $Marpa::R2::Context::slg->symbol_display_form($_) > } $Marpa::R2::Context::slg->rule_expand($Marpa::R2::Context::rule); > return $lhs; > } > > sub dump_and_exit > { > my ($self, @args) = @_; > print lhs, "\n", Dumper (@args); > exit; > } > > I use it gradually from the top to the bottom of the grammar. After > reaching the bottom I can go back to the top by replacing each > dump_and_exit by some useful code. Together with the default action > [name,values] I think I can finish my task pretty fast. > -- 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 marpa-parser+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
