Function split_commas

option_parser/src/lib.rs:87–121

(s: &str)

type OptionParserResult<T> = std::result::Result<T, OptionParserError>;

fn split_commas(s: &str) -> OptionParserResult<Vec<String>> {
    let mut list: Vec<String> = Vec::new();
    let mut opened_brackets = 0u64;
    let mut in_quotes = false;
    let mut current = String::new();

    for c in s.trim().chars() {
        match c {
            // In quotes, only '"' is special
            '"' => in_quotes = !in_quotes,
            _ if in_quotes => {}
            '[' => opened_brackets += 1,
            ']' => {
                if opened_brackets < 1 {
                    return Err(OptionParserError::InvalidSyntax(s.to_owned()));
                }
                opened_brackets -= 1;
            }
            ',' if opened_brackets == 0 => {
                list.push(current);
                current = String::new();
                continue;
            }
            _ => {}
        }
        current.push(c);
    }
    list.push(current);

    if in_quotes || opened_brackets != 0 {
        return Err(OptionParserError::InvalidSyntax(s.to_owned()));
    }

    Ok(list)
}

impl OptionParser {
    /// Creates an empty `OptionParser` with no registered options.