[antlr-interest] ANTLR3.0b2 - Best practice to end parsing ?

[David CROSSON]

I'm looking for the best way to stop scanning
a data stream which contains structured text
data blocks; Do you thing that the following :

SampleParser.all_return rc;
while(true) {
    rc=parser.all();
    BaseTree tree = (BaseTree)rc.getTree();
    if (tree.isNil()) break;
}
    
is the best way to end the scan once all the
structured data blocsk have been found ?




grammar SampleParser;
options {
    filter=true;
    output=AST;
}
@header {
  package stackdumpparser.parsers;
}
@lexer::header {
  package stackdumpparser.parsers;
}
all : 'A' {System.out.println("Found");}
    ;




public void testBasic() throws RecognitionException, InterruptedException {
    CharStream in = new ANTLRStringStream("BABAA");
    SampleParserLexer lexer = new SampleParserLexer(in);
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    SampleParser parser = new SampleParser(tokens);
    int i=0;
    SampleParser.all_return rc;
    while(true) {
        rc=parser.all();
        BaseTree tree = (BaseTree)rc.getTree();
        if (tree.isNil()) break;
    }
}

Best regards,
Crosson david.