[antlr-interest] Antlr missing getTree() method? C#

[Setia, Namit]

I'm sure there is something I'm doing wrong, but I can't figure it out.
I created a grammar (see below) and exported it to C#, then tried the
following code as a test:

Antlr.Runtime.ICharStream str = new
Antlr.Runtime.ANTLRStringStream("a=5;");
qss_grammarLexer qlex = new qss_grammarLexer(str);
Antlr.Runtime.CommonTokenStream tokens = new
Antlr.Runtime.CommonTokenStream(qlex);
qss_grammarParser qpar = new qss_grammarParser(tokens);

For some reason, I don't see any methods to extract the AST tree from
the parser (i.e., from the "qpar" variable).  I've seen in other posts
people calling qpar.getTree() or qpar.program().  Am I missing something
critical from my grammar?  Is it missing badly?  Or, am I supposed to
get the tree some other way?  I am using the daily build of antlr from
6/26/08 and antlworks 1.2b5.  I tried reverting to the older version,
and I get the same result.

Thanks,

namit

------------------------------------------------------------------------
--------------------------------------
grammar qss_grammar;

options
{
	language=CSharp2;
	output=AST;
}

qexprlist
  : ( qassignment_statement )* EOF!
  ;

qassignment_statement
  : qassignment SEMI { Console.Write("hello"); }
  ;

qassignment
  : (qname ASSIGN )? qexpr
  ;

qprimary_expr
  : qint
  | qvname
  | (LPAREN qexpr RPAREN ) 
  | qfunction
  | qarray
  | qstring
  ;

qsign_expr
  : qprimary_expr
  ;

qmul_expr
  : qsign_expr (( MUL | DIV | MOD ) qsign_expr)*
  ;
  
qexpr
  	:	 qmul_expr (( PLUS | MINUS ) qmul_expr)*
  ;



PLUS	:	'+';
MINUS	:	'-';
DIV	:	'/';
MUL	:	'*';
MOD	:	'%';
POW	:	'^';
LETTER	:	'a'..'z'|'A'..'Z';
DIGIT	:	'0'..'9';
PER	:	'.';
SEMI	:	';';
ASSIGN	:	'=';
EQ	:	'=''=';
NQ	:	'!''=';
LEQ	:	'<''=';
GEQ	:	'>''=';
LPAREN	:	'(';
RPAREN	:	')';

qint	:	(DIGIT)*;
qname	:	LETTER(LETTER|DIGIT)*;
qstr	:	(LETTER|DIGIT)*;
qstring	:	'"' (LETTER|DIGIT)* '"';
qinputval:	(LETTER|DIGIT)*;
qvname	:	(LETTER(LETTER|DIGIT)*)(':'qinputval('.'qinputval)*)?;
qarray	:	'{' (qstring|qvname)(','(qstring|qvname))* '}';
qfunction:	(LETTER(LETTER|DIGIT)*)'('
qprimary_expr(','qprimary_expr)* ')';


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