[antlr-interest] Re: Getting at the token text in a parser

[lgcraymer]

Looks like you haven't set buildAST=true in your parser options
section.  Also, use the #label syntax (#grp instead of grp)--antlr
name "mangling" could change.

--Loring


--- In antlr-interest at yahoogroups.com, "offline314159" <offline at s...>
wrote:
> --- In antlr-interest at yahoogroups.com, "lgcraymer" <lgc at m...> wrote:
> > $getText works in the lexer, not in the parser--in the lexer, there is
> > text associated with a rule, but not in the parser..  What you want to
> > do is label the AST (or Token) nodes that you want to extract text
> > from--say
> > v:value { #v.getText(); }
> > 
> > (assuming Java, not C++).
> 
> So sounds good, but if that's the case, what's the deal with this not
> working?  If i have this here: (note that group is just a basic word
> rule, nothing fancy)
> 
> groups
> returns [String g]
> :
> 	grp:group {g.append(grp);} ( DOT group )*
> 	;
> 
> When i try to run this code, antlr generates the parser but when it
> hits this point i get this:
> 
> java.lang.Error: Unresolved compilation problem: 
> 	grp cannot be resolved
> 
> 	at aimedia.vcard.util.parser.VCardParser.groups(VCardParser.java:273)
> 
> And the surrounding code is:
> 
> public final String  groups() throws RecognitionException,
> TokenStreamException {
> 	String g;
> 
> 	try {      // for error handling
> 		group();
> 		g.append(grp);
> 		{
> 		_loop2607:
> 		do {
> 			if ((LA(1)==DOT)) {
> 				match(DOT);
> 				group();
> 			}
> 			else {
> 				break _loop2607;
> 			}
> 			
> 		} while (true);
> 		}
> 	}
> 	catch (RecognitionException ex) {
> 		reportError(ex);
> 		consume();
> 		consumeUntil(_tokenSet_4);
> 	}
> 	return g;
> }
> 
> how do i make that identifier work?



 
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