I looked at ANTLRStringStreams consume() method and noticed that it
checks for a '\n'. In the current grammar I'm skip()ing newlines,
instead of placing them on a hidden channel.
I made the following modification to the grammar in ANTLRWorks which
promptly broke the compiler.
fragment NEWLINE : '\n' '\r'? {$channel=HIDDEN;};
fragment WS : ('\n'|'\r'|'\t'|' ')+ {$channel=HIDDEN;};
The error message is "cannot find symbol : variable _channel". I edited
QuizLexer.java and added
public static int _channel; Now when I run the test rig, I can see the
tokens returned from lexer.nextToken().getText(), although tokens.size()
still reports zero. This change also enables the debugger to correctly
parse the input.
Is $channel=HIDDEN not working in ANTLRWorks a known issue? The 404 Not
Found error for its source code repository does not inspire confidence
http://fisheye2.cenqua.com/browse/antlrworks.
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