use super::*; enum AttrKind { Inner, Outer } pub(super) fn inner_attributes(p: &mut Parser) { many(p, |p| attribute(p, AttrKind::Inner)) } pub(super) fn outer_attributes(p: &mut Parser) { many(p, |p| attribute(p, AttrKind::Outer)) } fn attribute(p: &mut Parser, kind: AttrKind) -> bool { fn attr_tail(p: &mut Parser) { meta_item(p) && p.expect(R_BRACK); } match kind { AttrKind::Inner => node_if(p, [POUND, EXCL, L_BRACK], ATTR, attr_tail), AttrKind::Outer => node_if(p, [POUND, L_BRACK], ATTR, attr_tail), } } fn meta_item(p: &mut Parser) -> bool { node_if(p, IDENT, META_ITEM, |p| { if p.eat(EQ) { if !expressions::literal(p) { p.error() .message("expected literal") .emit(); } } else if p.eat(L_PAREN) { comma_list(p, R_PAREN, meta_item_inner); p.expect(R_PAREN); } }) } fn meta_item_inner(p: &mut Parser) -> bool { meta_item(p) || expressions::literal(p) }