[antlr-interest] what means "mismatched input 'xxx' expecting set null"

[Pete Siemsen]

Gavin,

That was the problem.  I specified whitespace, and now it works.

Thank you very much!

-- Pete



On Oct 6, 2007, at 11:57 PM, Gavin Lambert wrote:

> At 17:51 7/10/2007, Pete Siemsen wrote:
>> PragmaInclude
>> : INCLUDE LPAREN f=StringConstant RPAREN
>> ;
> [...]
>> The above grammar produces the error.  What's wrong?
>
> Since PragmaInclude is a lexer rule, it won't discard whitespace  
> (or to be more specific, it won't generate whitespace tokens and  
> then either skip them or push them onto a hidden channel).  So  
> anywhere that whitespace may occur within a lexer rule you will  
> need to explicitly specify it.


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