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Handle extended key value attr in mbe

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This commit is contained in:
Edwin Cheng 2021-04-17 14:31:52 +08:00
parent df5b6f7d45
commit c4173bb468
3 changed files with 35 additions and 48 deletions
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37
crates/parser/src/grammar.rs
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@ -76,42 +76,7 @@ pub(crate) mod fragments {
// Parse a meta item , which excluded [], e.g : #[ MetaItem ]
pub(crate) fn meta_item(p: &mut Parser) {
fn is_delimiter(p: &mut Parser) -> bool {
matches!(p.current(), T!['{'] | T!['('] | T!['['])
}
if is_delimiter(p) {
items::token_tree(p);
return;
}
let m = p.start();
while !p.at(EOF) {
if is_delimiter(p) {
items::token_tree(p);
break;
} else {
// https://doc.rust-lang.org/reference/attributes.html
// https://doc.rust-lang.org/reference/paths.html#simple-paths
// The start of an meta must be a simple path
match p.current() {
IDENT | T![super] | T![self] | T![crate] => p.bump_any(),
T![=] => {
p.bump_any();
match p.current() {
c if c.is_literal() => p.bump_any(),
T![true] | T![false] => p.bump_any(),
_ => {}
}
break;
}
_ if p.at(T![::]) => p.bump(T![::]),
_ => break,
}
}
}
m.complete(p, TOKEN_TREE);
attributes::meta(p);
}
pub(crate) fn item(p: &mut Parser) {