[antlr-interest] C# target doesn't do numbers

[Vaclav Barta]

Hi,

I'm trying to construct an ANTL grammar for SQL queries (based on 
http://www.antlr.org/grammar/1062280680642/MS_SQL_SELECT.html, except it 
  should be some SQL subset acceptable to multiple SQL engines), and I 
have trouble parsing expressions. I've simplified the grammar to the bone:

grammar MacroScope;

options
{
	language=CSharp;
}

@lexer::namespace
{
	MacroScope
}

@parser::namespace
{
	MacroScope
}

constant returns [ ITerm value ] :
	Integer { $value = new IntegerValue(int.Parse($Integer.text)); }
	| NULL { $value = new NullValue(); }
	;

NULL : 'null' ;

Digit : '0'..'9' ;

Integer : ( Digit )+ ;

Whitespace : ( '\t' | ' ' | '\r' | '\n' )+ 	{ $channel = HIDDEN; }
	;

(MacroScope.IntegerValue and MacroScope.NullValue are my classes derived 
from MacroScope.ITerm.) ANTLWorks 1.0.2 considers this OK, 
org.antlr.Tool from that jar generates lexer and parser from it without 
complaints and Visual Studio 2005 compiles OK. But, when I run

MacroScopeLexer lexer = new MacroScopeLexer(
	new ANTLRStringStream("1"));
MacroScopeParser parser = new MacroScopeParser(
	new CommonTokenStream(lexer));
return parser.constant();

I get

line 1:0 no viable alternative at input '1'

on standard output (something I'll need to turn off, but first things 
first) and parser.constant() returns null. I have a feeling I'm missing 
something very obvious... Any suggestions?

	Bye
		Vasek