[antlr-interest] RE : Problem with new lines
Sharon Li
hushlee83 at yahoo.com.sg
Wed Feb 5 15:31:15 PST 2003
hmm..seems like it still doesn't work, but thanks anyway.
angle factor: 10 //--> exception after first line
initial color: 1 5
color increment: 1 10
initial line width: 5 pixels
// another comment
line width increment: 0
..............
An exception occurs straight after the first line. I can't figure where the problem lies. The previous codes works well with this but it doesn't work once I insert a newline after "angle factor:10":
/************ input file with new line inserted *******************/
angle factor: 10
initial color: 1 5
color increment: 1 10
initial line width: 5 pixels
// another comment
line width increment: 0
...............
Anthony_Brenelière <abreneliere at telys.com> wrote:
Try by adding a + behind :
NEWLINE
: ("\r\n" | '\r' | '\n')+
{ newline(); $setType(Token.SKIP); }
;
WS
: (' '|'\t')+
{ $setType(Token.SKIP); }
;
-----Message d'origine-----
De : Sharon Li [mailto:hushlee83 at yahoo.com.sg]
Envoyé : jeudi 6 février 2003 00:01
À : Antlr Interest Group
Objet : [antlr-interest] Problem with new lines
Hello,
can anyone help me with this?
1) My lexer can't seem to recognize newlines. Thanks.
/**************************** Lexer class
***************************************/
class ViewLexer extends Lexer;
options {
charVocabulary='\3'..'\377';
filter=true;
k = 4;
defaultErrorHandler=false;
}
//protected SYMBOL : (SIGN|'%'|'/'|'.'|','|'*');
protected LETTER : ( 'a'..'z' | 'A'..'Z' ) ;
protected DIGIT : ( '0'..'9' ) ;
protected SIGN : ('-'|'+');
COLON : ':';
DOT : '.';
COMMA : ',';
NUMERIC : (SIGN)? (DIGIT)+ ((DOT) (d:DIGIT)*)*
;
WORD : (LETTER) (LETTER|DIGIT)*
;
SL_COMMENT
: "//"
(~('\n'|'\r'))* ('\n'|'\r'('\n')?)?
{$setType(Token.SKIP); newline();}
;
//COMMENT : "/*" (options {greedy=false;} :.)* "*/" ;
NEWLINE : ('\r''\n')=> '\r''\n'
| '\r'{newline();}
| '\n'{newline();}
{
newline();
$setType(Token.SKIP);
}
;
WS : (' '|'\t') { $setType(Token.SKIP); } ;
/**************************************** End of lexer
*************************************/
2) How can I check for comments. How do I write a parser rule that
allows comments ?
Thanks a lot!!
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