[antlr-interest] Re: A simple question

[lgcraymer]

This is the type of situation where trees make the most sense. 
Parsing twice is slower (significantly) and not nearly as clean as
having two versions of a tree walker.

--Loring


--- In antlr-interest at yahoogroups.com, "yjargudo" <yjargudo at t...> wrote:
> hello,
> 
> I need to parse a file twice. In each parsing I have to use the same
> grammar only with different antlr actions added.
> 
> What I have to do?
> 
> I tried the following but It doesn't works
> 
> CPPLexer lex=new CPPLexer(anInputStream);
> lex.setTokenObjectClass("antlr.CommonHiddenStreamToken");
> TokenStreamHiddenTokenFilter filter=new 
>         TokenStreamHiddenTokenFilter(lex);
> filter.hide(CPPParser.Comment);
> filter.hide(CPPParser.CPPComment);
> parser = new CPPParser(filter);
> parser.translation_unit(this);
> 
> 
> CPPLexer2 lex2=new CPPLexer2(anInputStream);
> lex2.setTokenObjectClass("antlr.CommonHiddenStreamToken");
> TokenStreamHiddenTokenFilter filter2=new 
>        TokenStreamHiddenTokenFilter(lex2);
> filter2.hide(CPPParser2.Comment);
> filter2.hide(CPPParser2.CPPComment);
> parser2 = new CPPParser2(filter2);
> parser2.translation_unit(this);
> 
> 
> Thanks a lot,
> 
> Yolanda



 
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