[antlr-interest] Re: How to get difference set between two sets?

[Terence Parr]

On Friday, April 12, 2002, at 10:49  AM, yhhf_dy wrote:

> Thank for your response!
>
> Maybe I didn't describ my question clear last time. my question is
> there are two sets - identifier set and keyword set. keyword set is
> subset of identifier. I want to get the difference set between
> identifier and keyword, that is, get identifier but not include
> keyword. Is it possible to do that in antlr?

That's a hashtable isn't it?  You should be able to get the literals 
table (array or string) from the lexer object; it must also build a 
hashtable from that.

> I'm going to develop a VB 6 parser. Now I have established vb grammar
> file of anltr based on VB .NET grammar
> (http://msdn.microsoft.com/library/en-
> us/vbls7/html/vblrfvbspec12.asp.) When I compile grammar file there
> are lots of nondeterminism warning. I hope I can overcome those
> problem, right now I knew that it was a hard work to generate VB
> parser.

Ter


 

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