Fatih Tolga Ata schrieb: > Johannes Luber wrote: >> PAREXPR is a imaginary token, adding semantics to otherwise >> indiscriminable situations or just some additional clarity like in this >> case. The "-> ^()" is a tree rewrite operator, saying that the created >> AST should look differently than the original input. I suppose your >> problem with the tree walker is that it doesn't recognize all >> possibilities created by the parser. Unless the missing alternatives are >> somehow covered in the Identifier and literal rules, try > I appreciated for this information. >> primaryExpression >> : THIS >> | Identifier >> | literal >> | arrayLiteral >> | objectLiteral >> | ^( PAREXPR expression ) >> ; > I'm not sure, but I think, it worked! Thanks a lot. But I had to add > "backtrack=true" options because of LL(*) conflicts. I said "I think, it > worked", because I don't know exactly that it worked.
Look at <http://www.antlr.org/wiki/display/ANTLR3/How+to+remove+global+backtracking+from+your+grammar> for some tips to deal with this. Johannes > The treewalker > didn't give me an error, but I didn't look at the tree yet that it is > correct or not. Now I try to learn using the parser and the treewalker. >> In general, look at the documentation about ASTs to learn more about >> them. >> >> Johannes > I'm studying now how the parser and tree walker works. After that I want > to learn ANTLR grammar and the other things from the book (I haven't buy > it, but I'll) > > Thanks for helping. This gives me more desire to learn compilers and antlr. > > Fatih Tolga Ata > List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "il-antlr-interest" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en -~----------~----~----~----~------~----~------~--~---
