[antlr-interest] Suppress error mesages in console

[Dmitry Gusev]

I did implement my own error reporing routine, my grammar with that routine
is there: http://pastebin.com/f3ac5c70

But still I can't figure out where those errors are coming from... Here is
how I'm parsing the input:

            1. ANTLRStringStream input = new CaseInsensitiveStringStream
(expression);
            2. ExpressionLexer lexer = new ExpressionLexer(input);
            3. CommonTokenStream stream = new CommonTokenStream(lexer);
            4. ExpressionParser parser = new ExpressionParser(stream);
            5. try
            6. {
            7.    ExpressionParser.expr_return r = parser.expr();
            8.
            9.    return (CommonTree) r.Tree;
           10. } catch (RecognitionException) {
           11.     throw new MultipleRecognitionExceptions(parser.GetErrors
());
           12. }

The error messages I've mentioned appears in line 3

I know why the error occured, and I've made the bad input especially for the
example.

But the question is how to write the error handling routine that will
suppress that errors to be written to the standard output.


On Feb 2, 2008 6:07 PM, Jim Idle <jimi at temporal-wave.com> wrote:

>  Implement your own error reporting routine (should be an example in the
> wiki I think) and then you can do anything you like including being silent.
> However, this looks like a lexer specification problem. Do you have
> something that takes a path like: '0'...'9'+ ':' and your input is [999]?
> You need to allow the lexer rule to end before the ':' and let the lexer
> change the type of the token to whatever that means.
>
>
>
> In a lexer, unless you feel that your rules encapsulate all input at all
> points, then you may find it useful to have as your last rule:
>
>
>
> UNKNOWN : . {System.err.println("Debug: Character '" + $text + "' is not
> catered for."); } ;
>
>
>
> Jim
>
>
>
> *From:* Dmitry Gusev [mailto:dmitry.gusev at gmail.com]
> *Sent:* Saturday, February 02, 2008 4:54 AM
> *To:* antlr-interest at antlr.org
> *Subject:* [antlr-interest] Suppress error mesages in console
>
>
>
> If I try to parse bad input I have error messages in console like this:
>
> line 1:6 mismatched character ']' expecting ':'
>
> How can I suppress this output?
>
>
>
> --
> Dmitry Gusev
>



-- 
Dmitry Gusev
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