[antlr-interest] [begginer question] could somebody help me to see this simple grammar?
devdoer bird
devdoer2 at gmail.com
Wed Feb 16 00:18:42 PST 2011
HI,all:
the grammar is list below:
----------------------------------------------
logicExp
: FIELDNAME ( '>' | '<' ) (CONST_INT | CONST_STRING)
| '(' logicExp')'
;
fragment DIGIT : '0'..'9';
fragment LOWER : 'a'..'z';
fragment UPPER : 'A'..'Z';
FIELDNAME : LOWER (LOWER|DIGIT)* ;
CONST_INT : DIGIT+;
CONST_STRING : '"' (LOWER|UPPER|DIGIT)* '"';
----------------------------------------
When I use the antlrworks to test the grammar,I use the input "( a>3 )",but
the interepter failed to recoginze the last ")", output as follows:
logicExp
/ \
/ \
( logicExp
/\ \
/ \ \
a > 3
As you see, the last ')' is missed.
So what's wrong with my grammar?
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