[antlr-interest] case-insensitive parsing

[Andreas Meyer]

Have you tried making the whole comment a lexer token? This way, the 
keyword tokens would not interfere with plain text inside comments (If 
that was your intention: lexer rule names have to start with an upper 
case letter)

Andreas


Bob Sole schrieb:
> I'm trying to write a parser for PL/SQL package header files but I'm 
> banging my head against the wall with a basic problem to do with 
> case-insensitive parsing. I'm using Jim Idle's NoCaseFileStream to 
> convert tokens into upper case, but I'm finding that the parser gets 
> confused when it comes across language keywords that are embedded 
> within comments. Here's some example input which has the OR keyword 
> embedded within the package comment. The "create or replace package" 
> statement is deliberately messed up - the parser handles this 
> correctly, but it stumbles against the first 'or' on line 2:
>
> /**
> blah blah or blah
> */
> create Or rePlace PACKAGE
> test IS
>
> Here's the grammar:
>
> grammar Test;
>
> input: statement+ ;
>
> statement: pkgComment | pkgStmt ;
>
> pkgComment: '/**' description '*/' ;