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//! FIXME: write short doc here
use super::*;
pub(super) fn inner_attributes(p: &mut Parser) {
while p.at(T![#]) && p.nth(1) == T![!] {
attribute(p, true)
}
}
pub(super) fn with_outer_attributes(
p: &mut Parser,
f: impl Fn(&mut Parser) -> Option<CompletedMarker>,
) -> bool {
let am = p.start();
let has_attrs = p.at(T![#]);
attributes::outer_attributes(p);
let cm = f(p);
let success = cm.is_some();
match (has_attrs, cm) {
(true, Some(cm)) => {
let kind = cm.kind();
cm.undo_completion(p).abandon(p);
am.complete(p, kind);
}
_ => am.abandon(p),
}
success
}
pub(super) fn outer_attributes(p: &mut Parser) {
while p.at(T![#]) {
attribute(p, false)
}
}
fn attribute(p: &mut Parser, inner: bool) {
let attr = p.start();
assert!(p.at(T![#]));
p.bump(T![#]);
if inner {
assert!(p.at(T![!]));
p.bump(T![!]);
}
if p.eat(T!['[']) {
paths::use_path(p);
match p.current() {
T![=] => {
p.bump(T![=]);
if expressions::literal(p).is_none() {
p.error("expected literal");
}
}
T!['('] | T!['['] | T!['{'] => items::token_tree(p),
_ => {}
}
if !p.eat(T![']']) {
p.error("expected `]`");
}
} else {
p.error("expected `[`");
}
attr.complete(p, ATTR);
}
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