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fix: Recover from = in record constructor field assignment

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This commit is contained in:
Lukas Wirth 2024-02-13 18:23:28 +01:00
parent 925705e0c9
commit ccccc299c8
4 changed files with 82 additions and 27 deletions
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23
crates/parser/src/grammar/expressions.rs
View file

@ -678,27 +678,38 @@ pub(crate) fn record_expr_field_list(p: &mut Parser<'_>) {
attributes::outer_attrs(p);
match p.current() {
IDENT | INT_NUMBER => {
IDENT | INT_NUMBER if p.nth_at(1, T![::]) => {
// test_err record_literal_missing_ellipsis_recovery
// fn main() {
// S { S::default() }
// }
if p.nth_at(1, T![::]) {
m.abandon(p);
p.expect(T![..]);
expr(p);
} else {
}
IDENT | INT_NUMBER => {
if p.nth_at(1, T![..]) {
// test_err record_literal_before_ellipsis_recovery
// fn main() {
// S { field ..S::default() }
// }
if p.nth_at(1, T![:]) || p.nth_at(1, T![..]) {
name_ref_or_index(p);
p.expect(T![:]);
p.error("expected colon");
} else {
// test_err record_literal_field_eq_recovery
// fn main() {
// S { field = foo }
// }
if p.nth_at(1, T![:]) {
name_ref_or_index(p);
p.bump(T![:]);
} else if p.nth_at(1, T![=]) {
name_ref_or_index(p);
p.err_and_bump("expected colon");
}
expr(p);
m.complete(p, RECORD_EXPR_FIELD);
}
m.complete(p, RECORD_EXPR_FIELD);
}
T![.] if p.at(T![..]) => {
m.abandon(p);

4
crates/parser/test_data/parser/inline/err/0014_record_literal_before_ellipsis_recovery.rast
View file

@ -25,7 +25,6 @@ SOURCE_FILE
NAME_REF
IDENT "field"
WHITESPACE " "
RANGE_EXPR
DOT2 ".."
CALL_EXPR
PATH_EXPR
@ -46,4 +45,5 @@ SOURCE_FILE
WHITESPACE "\n"
R_CURLY "}"
WHITESPACE "\n"
error 25: expected COLON
error 25: expected colon
error 25: expected COMMA

41
crates/parser/test_data/parser/inline/err/0032_record_literal_field_eq_recovery.rast Normal file
View file

@ -0,0 +1,41 @@
SOURCE_FILE
FN
FN_KW "fn"
WHITESPACE " "
NAME
IDENT "main"
PARAM_LIST
L_PAREN "("
R_PAREN ")"
WHITESPACE " "
BLOCK_EXPR
STMT_LIST
L_CURLY "{"
WHITESPACE "\n "
RECORD_EXPR
PATH
PATH_SEGMENT
NAME_REF
IDENT "S"
WHITESPACE " "
RECORD_EXPR_FIELD_LIST
L_CURLY "{"
WHITESPACE " "
RECORD_EXPR_FIELD
NAME_REF
IDENT "field"
WHITESPACE " "
ERROR
EQ "="
WHITESPACE " "
PATH_EXPR
PATH
PATH_SEGMENT
NAME_REF
IDENT "foo"
WHITESPACE " "
R_CURLY "}"
WHITESPACE "\n"
R_CURLY "}"
WHITESPACE "\n"
error 26: expected colon

3
crates/parser/test_data/parser/inline/err/0032_record_literal_field_eq_recovery.rs Normal file
View file

@ -0,0 +1,3 @@
fn main() {
S { field = foo }
}