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
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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
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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
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LL | impl PartialEq<usize> for MyType {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
```
35 lines
1.3 KiB
Plaintext
35 lines
1.3 KiB
Plaintext
error: constant of non-structural type `CustomEq` in a pattern
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--> $DIR/cross-crate-fail.rs:11:9
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LL | consts::SOME => panic!(),
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| ^^^^^^^^^^^^ constant of non-structural type
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::: $DIR/auxiliary/consts.rs:1:1
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LL | pub struct CustomEq;
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| ------------------- `CustomEq` must be annotated with `#[derive(PartialEq)]` to be usable in patterns
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...
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LL | pub const SOME: Option<CustomEq> = Some(CustomEq);
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| -------------------------------- constant defined here
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= note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralPartialEq.html for details
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error: constant of non-structural type `CustomEq` in a pattern
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--> $DIR/cross-crate-fail.rs:17:9
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LL | <Defaulted as consts::AssocConst>::SOME => panic!(),
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constant of non-structural type
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::: $DIR/auxiliary/consts.rs:1:1
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LL | pub struct CustomEq;
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| ------------------- `CustomEq` must be annotated with `#[derive(PartialEq)]` to be usable in patterns
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...
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LL | const SOME: Option<CustomEq> = Some(CustomEq);
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| ---------------------------- constant defined here
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= note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralPartialEq.html for details
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error: aborting due to 2 previous errors
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