Deunwrap add_missing_match_arms #15594
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rustbot
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DropDemBits
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Sep 12, 2023
| .map(|f| make::ext::simple_ident_pat(f.name().unwrap()).into()); | ||
| let pats = field_list.fields().map(|f| { | ||
| make::ext::simple_ident_pat( | ||
| f.name().expect("Record field must have a name"), |
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This feels like it could panic in the following situation, but I'm not exactly sure if it will:
enum A {
A,
Missing { a: u32, : u32, c: u32 }
}
fn a() {
let b = A::A;
match b$0 {}
}There was a problem hiding this comment.
Thank you for mentioning this, I checked it and it doesn't. Syntax tree for the missing field name shows :
[crates/ide-assists/src/handlers/add_missing_match_arms.rs:458] &f = RecordField {
syntax: RECORD_FIELD@40..43
NAME@40..43
IDENT@40..43 "u32"
,
how little the piece may be it is still being recognized as NAME and something like { a:32 , , c: u32} completely skips seeing a record field between a and c. So we are good.
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Would be good to add this as a test case though, we might change recovery in the future which could change this behavior.
Veykril
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Although it doesn't panic now, further changes to how we recover from incomplete syntax may cause this assist to panic. To mitigate this a test case has been added.
|
@bors r+ |
|
☀️ Test successful - checks-actions |
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Last subtask of #15398