fn parse_kv Result>()

in rust/ccommon-backend/src/option/parse.rs [273:302]

• 23 lines of code
• 4 McCabe index (conditional complexity)

fn parse_kv<'a>(input: &'a [u8], line: u32) -> Result<(&'a [u8], &'a [u8]), ParseError<'a>> {
    let mut first = true;

    let mut split = input.split(|&x| {
        if x == b':' && first {
            first = false;
            return true;
        }

        false
    });

    let key = match split.next() {
        Some(x) => x,
        // There will always be at least one subslice
        None => unreachable!(),
    };
    let value = match split.next() {
        Some(x) => x,
        None => return Err(ParseError::missing_colon(Span::new(input, line))),
    };

    let key = trim_bytes(key);

    if !is_valid_name(key) {
        return Err(ParseError::invalid_key(Span::new(key, line)));
    }

    Ok((key, trim_bytes(value)))
}