Function delimited_some

pub fn delimited_some<I, T, F>(
    input: &mut Pear<I>,
    start: T,
    cond: F,
    end: T,
) -> Result<I::Many, I>
where
    I: Input,
    T: Token<I>,
    F: FnMut(&I::Token) -> bool,

Parse a token stream that starts with start and ends with end, returning all of the tokens in between. The tokens in between must match cond. There must be at least one token between start and end.