[antlr-interest] newbie question

[Rolf Schumacher]

Thx, missed that bit.

Rolf

p.s.--------------
this does the job now
- -------------------
class WikiParser extends Parser;

text : ( LINE )+
~ ;

class WikiLexer extends Lexer;
options { charVocabulary = '\u0000' .. '\u00ff'; }
//if you put '\uffff' here instead "it would wind up generating huge
lexers"

protected
LINECHAR
~ :
~ ~'\n'
~ ;
LINE
~ :
~ (LINECHAR)+ {System.out.println(getText());}
~ ;
WS : '\n'
~ { _ttype = Token.SKIP; newline(); }
~ ;





Terence Parr wrote:

| On Apr 9, 2004, at 2:18 AM, Rolf Schumacher wrote:
|
|> Even though I solved my problem I'd like to be able to understand
|> 'why':
|>
|> Why this rule does not work?:
|>
|> LINECHAR: ~'\n';
|>
|> while this is working:
|>
|> LINECHAR: '\u0000'..'\u0009' | '\u000b'..'\uffff';
|>
|> I would expect identical behavior from both lexer rules. The
|> answer must be simple, though I read several days thru the docs
|> and could not find it. Can you help me?
|
|
| Hi Rolf,
|
| You need to specify a charVocabulary option so that the "not"
| operator makes sense. :)
|
| Terence
|
|> Rolf
|>
|> p.s. --------------- The full story: this works:
|> -------------------- class WParser extends Parser; text : (
|> LINE )+ ;
|>
|> class WLexer extends Lexer; protected LINECHAR:
|> '\u0000'..'\u0009' | '\u000b'..'\uffff' // putting ~'\n' here
|> does not work, why?? ; LINE : (LINECHAR)+
|> {System.out.println(getText());} ; WS : '\n' { _ttype =
|> Token.SKIP; newline(); } ;
|>
|>
|
|
|
|
|
|
| Yahoo! Groups Links
|
|
|
|
|
|
|
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