[antlr-interest] Problems using ! in lexer with C# output

[James Park]

I'm having problems generating C# code that compiles when I use ! in 
a lexer rule. I'm trying to figure out whether I am doing something 
incorrectly or whether there is a bug in the C# generator.

I have the following rule in my lexer definition:

REFERENCE :
	(		'$'! (IDENTIFIER) 
		|	"${"! (IDENTIFIER) '}'!
	)
	;


The C# output generated is below:

if ((LA(1)=='$') && (tokenSet_0_.member(LA(2))))
{
    int _saveIndex = 0;
    _saveIndex = text.Length; 
    match('$');
    text.Length = _saveIndex;
    {
        mIDENTIFIER(false);
    }
}
else if ((LA(1)=='$') && (LA(2)=='{')) 
{
    _saveIndex = text.Length;
    match("${");
    text.Length = _saveIndex;
    {
        mIDENTIFIER(false);
    }
    _saveIndex = text.Length;
    match('}');
    text.Length = _saveIndex;
}

This bit of code does not compile because there is no _saveIndex 
defined in the else if block. Do I need to do something differently 
in my rule or is this a bug?

thanks for any help.
jp

--
James Park
jpark at constanttime.com
http://dynamicdns.constanttime.com


 

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