[antlr-interest] Two Problems left in ASN.1 grammar
v_vivekg
v_vivekg at yahoo.com
Thu Jun 5 21:05:41 PDT 2003
Hello Ter/Rick
There are exactly two problems left in my ASN.1 grammar for which I
need your help for solving them.
1) There is error reported if an identifier(upper or lower case)
matches with a keyword for eg
symbol returns [String s]
{s="";}
: (up:UPPER { s = up.getText();}
| lid:LOWER { s = lid.getText();})
;
If this rule matches UPPER or LOWER with a keyword then there is an
error 'unexpected Token '.
2) Not everything is consumed by inverting a rule. EG
| (UPPER "MACRO" ASSIGN_OP BEGIN_KW (~(WS))* END_KW)=> UPPER "MACRO"
ASSIGN_OP BEGIN_KW (~(WS))* END_KW
WS is white space skipping ' ' and new lines.The above rule fails when
a double quotes followed by some character is encountered(eg at "{" it
says expecting '"' found '{'), I think it problem with a character set.
Waiting for your replies.
Regards
Vivek
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