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show a trailing comma on singleton tuple constructors in witness pats

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This commit is contained in:
dianne
2025-08-10 15:32:14 -07:00
parent 29737cb44b
commit 9449b78621
3 changed files with 11 additions and 8 deletions
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compiler/rustc_pattern_analysis/src/rustc/print.rs
+3
View File
@@ -119,6 +119,9 @@ pub(crate) fn write_struct_like<'tcx>(
write!(f, "_")?;
}
}
if matches!(ty.kind(), ty::Tuple(..)) && num_fields == 1 {
write!(f, ",")?;
}
write!(f, ")")?;
}
tests/ui/or-patterns/exhaustiveness-non-exhaustive.rs
+2 -2
View File
@@ -7,11 +7,11 @@ fn main() {
(0 | 1, 2 | 3) => {}
}
match ((0u8,),) {
//~^ ERROR non-exhaustive patterns: `((4_u8..=u8::MAX))`
//~^ ERROR non-exhaustive patterns: `((4_u8..=u8::MAX,),)`
((0 | 1,) | (2 | 3,),) => {}
}
match (Some(0u8),) {
//~^ ERROR non-exhaustive patterns: `(Some(2_u8..=u8::MAX))`
//~^ ERROR non-exhaustive patterns: `(Some(2_u8..=u8::MAX),)`
(None | Some(0 | 1),) => {}
}
}
tests/ui/or-patterns/exhaustiveness-non-exhaustive.stderr
+6 -6
View File
@@ -11,30 +11,30 @@ LL ~ (0 | 1, 2 | 3) => {},
LL + (2_u8..=u8::MAX, _) => todo!()
|
error[E0004]: non-exhaustive patterns: `((4_u8..=u8::MAX))` not covered
error[E0004]: non-exhaustive patterns: `((4_u8..=u8::MAX,),)` not covered
--> $DIR/exhaustiveness-non-exhaustive.rs:9:11
|
LL | match ((0u8,),) {
| ^^^^^^^^^ pattern `((4_u8..=u8::MAX))` not covered
| ^^^^^^^^^ pattern `((4_u8..=u8::MAX,),)` not covered
|
= note: the matched value is of type `((u8,),)`
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown
|
LL ~ ((0 | 1,) | (2 | 3,),) => {},
LL + ((4_u8..=u8::MAX)) => todo!()
LL + ((4_u8..=u8::MAX,),) => todo!()
|
error[E0004]: non-exhaustive patterns: `(Some(2_u8..=u8::MAX))` not covered
error[E0004]: non-exhaustive patterns: `(Some(2_u8..=u8::MAX),)` not covered
--> $DIR/exhaustiveness-non-exhaustive.rs:13:11
|
LL | match (Some(0u8),) {
| ^^^^^^^^^^^^ pattern `(Some(2_u8..=u8::MAX))` not covered
| ^^^^^^^^^^^^ pattern `(Some(2_u8..=u8::MAX),)` not covered
|
= note: the matched value is of type `(Option<u8>,)`
help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern or an explicit pattern as shown
|
LL ~ (None | Some(0 | 1),) => {},
LL + (Some(2_u8..=u8::MAX)) => todo!()
LL + (Some(2_u8..=u8::MAX),) => todo!()
|
error: aborting due to 3 previous errors