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Parse outer attributes on StructPatternEtCetera

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This commit is contained in:
zhoufan 2021-10-02 09:57:44 +08:00
parent 237ea0d34d
commit 0ee6b70b34
6 changed files with 103 additions and 32 deletions
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67
crates/parser/src/grammar/patterns.rs
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@ -200,12 +200,43 @@ fn tuple_pat_fields(p: &mut Parser) {
p.expect(T![')']);
}
// test record_pat_field
// fn foo() {
// let S { 0: 1 } = ();
// let S { x: 1 } = ();
// let S { #[cfg(any())] x: 1 } = ();
// }
fn record_pat_field(p: &mut Parser) {
match p.current() {
IDENT | INT_NUMBER if p.nth(1) == T![:] => {
name_ref_or_index(p);
p.bump(T![:]);
pattern(p);
}
T![.] => {
if p.at(T![..]) {
p.bump(T![..]);
} else {
ident_pat(p, false);
}
}
T![box] => {
// FIXME: not all box patterns should be allowed
box_pat(p);
}
_ => {
ident_pat(p, false);
}
}
}
// test record_pat_field_list
// fn foo() {
// let S {} = ();
// let S { f, ref mut g } = ();
// let S { h: _, ..} = ();
// let S { h: _, } = ();
// let S { #[cfg(any())] .. } = ();
// }
fn record_pat_field_list(p: &mut Parser) {
assert!(p.at(T!['{']));
@ -214,32 +245,26 @@ fn record_pat_field_list(p: &mut Parser) {
while !p.at(EOF) && !p.at(T!['}']) {
match p.current() {
// A trailing `..` is *not* treated as a REST_PAT.
T![.] if p.at(T![..]) => p.bump(T![..]),
T![.] if p.at(T![..]) => {
rest_pat(p);
}
T!['{'] => error_block(p, "expected ident"),
T![#] => {
let m = p.start();
attributes::outer_attrs(p);
if p.at(T![..]) {
p.bump(T![..]);
m.complete(p, REST_PAT);
} else {
record_pat_field(p);
m.complete(p, RECORD_PAT_FIELD);
}
}
_ => {
let m = p.start();
attributes::outer_attrs(p);
match p.current() {
// test record_pat_field
// fn foo() {
// let S { 0: 1 } = ();
// let S { x: 1 } = ();
// let S { #[cfg(any())] x: 1 } = ();
// }
IDENT | INT_NUMBER if p.nth(1) == T![:] => {
name_ref_or_index(p);
p.bump(T![:]);
pattern(p);
}
T![box] => {
// FIXME: not all box patterns should be allowed
box_pat(p);
}
_ => {
ident_pat(p, false);
}
}
record_pat_field(p);
m.complete(p, RECORD_PAT_FIELD);
}
}