mirror of
https://github.com/rust-lang/rust.git
synced 2026-04-26 13:01:27 +03:00
Esteban Küber
3f08f6759a
```
error: constant of non-structural type `partial_eq::S` in a pattern
--> $DIR/suggest_equality_comparison_instead_of_pattern_matching.rs:16:18
|
LL | struct S;
| -------- `partial_eq::S` must be annotated with `#[derive(PartialEq)]` to be usable in patterns
...
LL | const C: S = S;
| ---------- constant defined here
...
LL | Some(C) => {}
| ^ constant of non-structural type
|
note: the `PartialEq` trait must be derived, manual `impl`s are not sufficient; see https://doc.rust-lang.org/stable/std/marker/trait.StructuralPartialEq.html for details
--> $DIR/suggest_equality_comparison_instead_of_pattern_matching.rs:5:5
|
LL | impl PartialEq<S> for S {
| ^^^^^^^^^^^^^^^^^^^^^^^
help: add a condition to the match arm checking for equality
|
LL - Some(C) => {}
LL + Some(binding) if binding == C => {}
|
```
23 lines
684 B
Plaintext
23 lines
684 B
Plaintext
error: constant of non-structural type `Cow<'_, str>` in a pattern
|
|
--> $DIR/issue-89088.rs:16:9
|
|
|
|
|
LL | const FOO: &A = &A::Field(Cow::Borrowed("foo"));
|
|
| ------------- constant defined here
|
|
...
|
|
LL | FOO => todo!(),
|
|
| ^^^ constant of non-structural type
|
|
|
|
|
--> $SRC_DIR/alloc/src/borrow.rs:LL:COL
|
|
|
|
|
= note: `Cow<'_, str>` is not usable in patterns
|
|
|
|
|
= note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralPartialEq.html for details
|
|
help: add a condition to the match arm checking for equality
|
|
|
|
|
LL - FOO => todo!(),
|
|
LL + binding if binding == FOO => todo!(),
|
|
|
|
|
|
|
error: aborting due to 1 previous error
|
|
|