Function parse

src/expr.rs:52–69

(iter: Iter)

}

pub fn parse(iter: Iter) -> Result<Expr> {
    match &iter.next() {
        Some(TokenTree::Ident(i)) if i.to_string() == "stable" => parse_stable(iter),
        Some(TokenTree::Ident(i)) if i.to_string() == "beta" => Ok(Expr::Beta),
        Some(TokenTree::Ident(i)) if i.to_string() == "nightly" => parse_nightly(iter),
        Some(TokenTree::Ident(i)) if i.to_string() == "since" => parse_since(i, iter),
        Some(TokenTree::Ident(i)) if i.to_string() == "before" => parse_before(i, iter),
        Some(TokenTree::Ident(i)) if i.to_string() == "not" => parse_not(i, iter),
        Some(TokenTree::Ident(i)) if i.to_string() == "any" => parse_any(i, iter),
        Some(TokenTree::Ident(i)) if i.to_string() == "all" => parse_all(i, iter),
        unexpected => {
            let span = unexpected
                .as_ref()
                .map_or_else(Span::call_site, TokenTree::span);
            Err(Error::new(span, "expected one of `stable`, `beta`, `nightly`, `since`, `before`, `not`, `any`, `all`"))
        }
    }
}

fn parse_nightly(iter: Iter) -> Result<Expr> {
    let paren = match token::parse_optional_paren(iter) {