Hi,
I am currently trying to dig into Antlr as I find this tool very helpful. The
last Time I used it, I generated something based upon a finished grammar.
This time I wanted to build my own grammar and really start understanding
what's happening.
For this I decided to build a parser for some Wiki-Notation-Like text.
Here an example (without the -Start - and - End - row):
------------ Start ---------------
before
More before
And yet even more ...
[Lineup]
[Floor:Main Floor]
Test1
Test2
[Floor:Classics Floor]
Test3
Test4
Test5
Test6
[/Lineup]
after
more After
..
And even more.
------------ End ---------------
If the text contains a "Lineup" block, then this should be parsed. The content
is at least one "Floor" followed by a number of Names, a new "Floor" or the
closing "Lineup"
I managed my parser to parse the text if I change my grammar and the text I am
trying to parse to "[Floor:]" (One Block) but I really need a name in there :(
As soon as I change my Grammar to support the Floor-Name, nothing works anymore.
Could you please help me with this? I'm not looking for someone that fixes it
for me without a comment. I would really like to know why my grammar doesn't
work.
I'm really stuck and I'm working on this for days now (Ok ... I admit, it's
just my spare time after work ... but at least all of that).
Here comes my gammar. If I try to parse the full text, I allways get
EarlyExitExceptions while parsing the :( :
grammar CalendarEventsJava;
/*------------------------------------------------------------------
* PARSER RULES
*------------------------------------------------------------------*/
event : (
(LINE_CONTENT | NEWLINE)*
(lineup (LINE_CONTENT | NEWLINE)*)?
);
lineup : (LINEUP_OPEN NEWLINE floor+ LINEUP_CLOSE);
floor : (FLOOR_OPEN LINE_CONTENT FLOOR_CLOSE NEWLINE lineupEntry+);
lineupEntry
: (LINE_CONTENT? NEWLINE);
artist : LINE_CONTENT;
/*------------------------------------------------------------------
* LEXER RULES
*------------------------------------------------------------------*/
LINEUP_OPEN
: '[Lineup]';
LINEUP_CLOSE
: '[/Lineup]';
FLOOR_OPEN
: '[Floor:';
FLOOR_CLOSE
: ']';
BLANKS : ( ' ' | '\t' )+;
NONBREAKING
: ~('\r' | '\n');
NEWLINE : '\r'? '\n';
// the content of a line consists of at least one non-breaking character.
LINE_CONTENT
: NONBREAKING+ ;
I really hope you can help me, as I'm really anxious to really get started with
ANTLR, cause I think it really rocks :)
Chris
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