Function pear::combinators::surrounded

pub fn surrounded<I, O, F, P>(input: &mut Pear<I>, p: P, f: F) -> Result<O, I>where
    I: Input,
    F: FnMut(&I::Token) -> bool,
    P: FnMut(&mut Pear<I>) -> Result<O, I>,

Skips all tokens that match f before and after a p, returning p.