[antlr-interest] lexical set calculation
孙纪刚 Jigang (Robert) Sun
sunjigang1965 at yahoo.com.cn
Thu Sep 28 11:15:58 PDT 2006
I want a char set defined by v3 grammar:
MyChar: MyChar:'a'..'m'|'o'..'q'|'s'..'z'; //'a'..'z' except 'n' and 'r'
How can I describe it with an equivelant grammar like
MyChar:LowerCaseChar ~ SpecialChar; //'a'..'z' except 'n' and 'r'
fragment LowerCaseChar:'a'..'z';
fragment SpecialChar:'n'|'r';
Cheers.
Jigang
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