[antlr-interest] about parse key words

[Renee Luo]

Hi there,

I have a problem with parse key words.  Like in PL/SQL "EXIT"  is key word. But some variable names also include this key word.

DECLARE
 CURSOR my_cursor IS
 ........
BEGIN
 OPEN my_cursor;
 LOOP
 ......
 exit WHEN my_cursor%NOTFOUND;
 .......
END LOOP;
CLOSE my_cursor;

:GLOBAL.exit := 'Y'; --------- (if this statement is  :GLOBAL.exit123:= 'Y', no problem)
 EXECUTE_TRIGGER('WHEN-WINDOW-CLOSED');

If my g file is set "exit" as keyword, when the g file analyses the variable name , always go to "statement" rule to match keyword then throw exception. How can let the parser knows the second "exit" is variable( go to varName rule) not key word ( don't  go to "statement" rule)?

statement
                :
                .......
                |
                                "EXIT"^ (expression)? (WHEN! (expression))? SEMI!
                |
                                ...........
                ;
......

varName :
                (COLON)? IDENT^ (DOLLAR IDENT)? ( DOT IDENT )?  ( DOT (IDENT | COMMIT) )? ( DOT (IDENT) )?                  {#varName.setType(VARIABLE_NAME); }
                ;

Someone can help me to solve this problem? Thanks in advance.

Renee

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