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|
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)
}
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