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fix: consider assignee expressions in record fields exhaustiveness check

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This commit is contained in:
Ryo Yoshida 2022-07-24 22:34:53 +09:00
parent 64758bd481
commit 805ac666ca
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GPG key ID: E25698A930586171
2 changed files with 35 additions and 1 deletions
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5
crates/hir-ty/src/diagnostics/expr.rs
View file

@ -305,7 +305,10 @@ pub fn record_literal_missing_fields(
expr: &Expr,
) -> Option<(VariantId, Vec<LocalFieldId>, /*exhaustive*/ bool)> {
let (fields, exhaustive) = match expr {
Expr::RecordLit { fields, spread, .. } => (fields, spread.is_none()),
Expr::RecordLit { fields, spread, ellipsis, is_assignee_expr, .. } => {
let exhaustive = if *is_assignee_expr { !*ellipsis } else { spread.is_none() };
(fields, exhaustive)
}
_ => return None,
};

31
crates/ide-diagnostics/src/handlers/missing_fields.rs
View file

@ -292,6 +292,37 @@ fn x(a: S) {
)
}
#[test]
fn missing_record_expr_in_assignee_expr() {
check_diagnostics(
r"
struct S { s: usize, t: usize }
struct S2 { s: S, t: () }
struct T(S);
fn regular(a: S) {
let s;
S { s, .. } = a;
}
fn nested(a: S2) {
let s;
S2 { s: S { s, .. }, .. } = a;
}
fn in_tuple(a: (S,)) {
let s;
(S { s, .. },) = a;
}
fn in_array(a: [S;1]) {
let s;
[S { s, .. },] = a;
}
fn in_tuple_struct(a: T) {
let s;
T(S { s, .. }) = a;
}
",
);
}
#[test]
fn range_mapping_out_of_macros() {
check_fix(