mirror of
https://github.com/rust-lang/rust.git
synced 2025-05-14 02:49:40 +00:00
335d05aee5
- Point at type that should derive `PartialEq` to be structural.
- Point at manual `impl PartialEq`, explaining that it is not sufficient to be structural.
```
error: constant of non-structural type `MyType` in a pattern
--> $DIR/const-partial_eq-fallback-ice.rs:14:12
|
LL | struct MyType;
| ------------- `MyType` must be annotated with `#[derive(PartialEq)]` to be usable in patterns
...
LL | const CONSTANT: &&MyType = &&MyType;
| ------------------------ constant defined here
...
LL | if let CONSTANT = &&MyType {
| ^^^^^^^^ 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/const-partial_eq-fallback-ice.rs:5:1
|
LL | impl PartialEq<usize> for MyType {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
```
17 lines
504 B
Plaintext
17 lines
504 B
Plaintext
error: constant of non-structural type `S` in a pattern
|
|
--> $DIR/match_ice.rs:11:9
|
|
|
|
|
LL | struct S;
|
|
| -------- `S` must be annotated with `#[derive(PartialEq)]` to be usable in patterns
|
|
...
|
|
LL | const C: &S = &S;
|
|
| ----------- constant defined here
|
|
LL | match C {
|
|
LL | C => {}
|
|
| ^ constant of non-structural type
|
|
|
|
|
= note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralPartialEq.html for details
|
|
|
|
error: aborting due to 1 previous error
|
|
|