ANTLR get and split lexer content

Question

first, sorry about my english, i still learning.

I writing Python module for my framework, which parsing CSS files. I try regex, ply (python lexer and parser), but i fou

Answer 1

You should use the ! and ^ AST hints. To make /* not appear in your AST, put ! after it. To control which elements become roots of AST subtrees, append ^. It might look something like this:

NESTED_ML_COMMENT
:   COMMENT_START!
    (options {greedy=false;} : (NESTED_ML_COMMENT^ | . ) )* 
    COMMENT_END!
;

Here's a question specifically about these operators, which now that you know exist, I hope will be useful: What does ^ and ! stand for in ANTLR grammar