How to ignore all chars except a certain set?

[mainrs]

In brainfuck, every character that is not []<>,.+- should be treated as a comment. How can I do that based on the example you provided? https://github.com/zesterer/chumsky/blob/master/examples/brainfuck.rs

I've tried this but this sadly does not work:

const VALID_TOKENS: &str = "[]<>+-.,";

let invalid_chars = filter(|c| !VALID_TOKENS.contains(*c)).repeated();

    choice((
        just('<').to(DiamondLeft),
        just('>').to(DiamondRight),
        just('.').to(Dot),
        just(',').to(Comma),
        just('+').to(Plus),
        just('-').to(Minus),
        just('[').to(SquareBracketLeft),
        just(']').to(SquareBracketRight),
    ))
    .padded()
    .map_with_span(|t, s| (t, s))
    .repeated()
    .padded_by(invalid_chars)
    .then_ignore(end())

[mainrs]

I just saw the problem: it's the parser application order. padded_by has to be called before repeated.