On Fri, Apr 9, 2010 at 10:56 AM, Dietmar Schaefer <dietma...@online.de>wrote:
> ...
> DefSequence L { -- } works
>
> DefSequence L { A1200} gives me MismatchedTokenException: line 1:16
> mismatched input 'A1200' expecting '\u0006'
>
When stumbling upon the 'A' from 'A1200', the lexer tries to complete an
ID-rule. Try moving the VALUE-rule before the ID-rule:
grammar Test;
scenario
: statement
;
statement
: sequenceStatement
;
sequenceStatement
: 'DefSequence' ID '{' VALUE '}' ';'?
;
VALUE
: ('A' | 'B' | 'C') DIGIT DIGIT DIGIT DIGIT
| ('-')*
;
ID
: LETTER (LETTER | DIGIT | '_')*
;
fragment
DIGIT
: '0'..'9'
;
fragment
LETTER
: 'a'..'z' | 'A'..'Z'
;
WHITESPACE
: ('\t' | ' ' | '\n' | '\r')+ {$channel = HIDDEN;}
;
But note that your ID's can then not start with 'A', 'B' or 'C'! If you want
that, look into semantic predicates:
http://www.antlr.org/doc/glossary.html#Predicate,_semantic
Regards,
Bart.
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