protospec-build 0.3.0

One binary format language to rule them all, One binary format language to find them, One binary format language to bring them all and in the darkness bind them.
Documentation 
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use super::*;

pub fn parse_field(t: &mut TokenIter) -> ParseResult<Field> {
    let start = t.peek_span()?;

    let type_ = parse_type(t, false)?;
    let (flags, condition, transforms) = parse_condition_and_transform(t)?;

    let mut out = Field {
        span: transforms
            .last()
            .map(|x| x.span + start)
            .or_else(|| condition.as_ref().map(|x| *x.span() + start))
            .unwrap_or(start),
        type_,
        condition,
        transforms,
        flags,
    };
    while t.eat(Token::LeftSquare).is_some() {
        let length = parse_length_constraint(t)?;
        let end = t.expect(Token::RightSquare)?;

        let (flags, condition, transforms) = parse_condition_and_transform(t)?;
        out = Field {
            type_: Type {
                span: out.span + end,
                raw_type: RawType::Array(Array {
                    span: out.span + end,
                    element: Box::new(out),
                    length,
                }),
            },
            condition,
            transforms,
            flags,
            span: start + end,
        };
    }

    Ok(out)
}