[antlr-interest] Lexer error handling,

[Craig Main]

Hi,

 

I have made the necessary override and @rulecatch changes to ensure that my
parser throws the first error it encounters out to my catch block.

I followed the instructions in the book "Exiting the recogniser upon first
error".

 

I am struggling to achieve the same thing with the lexer. I am using the C#
target (3.0.1, though I have also tried 3.1).

I still get the four or five error messages printed, the lexer attempts to
recover and I cannot seem to override the default behaviour.

 

I have added the lexer members

@lexer::members{

    protected override void Mismatch(IIntStream input, int ttype, BitSet
follow) {

        throw new MismatchedTokenException(ttype, input);

    }

 

    public override object RecoverFromMismatchedSet(IIntStream input,
RecognitionException e, BitSet follow) {

        throw e;

    }

    

}

 

>From examining the source it would appear that @lexer::rulecatch is not
supported?

How do I get the lexer to bail on first error?

 

Regards

Craig.

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