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.
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use super::*;

pub fn parse_import_declaration(t: &mut TokenIter) -> ParseResult<ImportDeclaration> {
    let start = t.expect(Token::Import)?;
    let mut items = vec![];
    loop {
        let name = t.expect_ident()?;
        let alias = if let Some(_) = t.eat(Token::As) {
            Some(t.expect_ident()?)
        } else {
            None
        };
        items.push(ImportItem {
            span: alias
                .as_ref()
                .map(|x| x.span + name.span)
                .unwrap_or(name.span),
            name,
            alias,
        });
        if !t.eat(Token::Comma).is_some() {
            break;
        }
        if t.peek_token(Token::From)? {
            break;
        }
    }
    t.expect(Token::From)?;

    let from = t.expect_string()?;

    Ok(ImportDeclaration {
        span: start + from.span,
        items,
        from,
    })
}