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 {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
```
39 lines
1.5 KiB
Plaintext
39 lines
1.5 KiB
Plaintext
error: constant of non-structural type `B` in a pattern
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--> $DIR/issue-62307-match-ref-ref-forbidden-without-eq.rs:35:9
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LL | struct B(i32);
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| -------- `B` must be annotated with `#[derive(PartialEq)]` to be usable in patterns
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...
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LL | const RR_B1: & & B = & & B(1);
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| ------------------ constant defined here
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...
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LL | RR_B1 => { println!("CLAIM RR0: {:?} matches {:?}", RR_B1, RR_B0); }
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| ^^^^^ 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
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--> $DIR/issue-62307-match-ref-ref-forbidden-without-eq.rs:22:1
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LL | impl PartialEq for B {
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| ^^^^^^^^^^^^^^^^^^^^
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error: constant of non-structural type `B` in a pattern
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--> $DIR/issue-62307-match-ref-ref-forbidden-without-eq.rs:42:9
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LL | struct B(i32);
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| -------- `B` must be annotated with `#[derive(PartialEq)]` to be usable in patterns
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...
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LL | const RR_B1: & & B = & & B(1);
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| ------------------ constant defined here
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...
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LL | RR_B1 => { println!("CLAIM RR1: {:?} matches {:?}", RR_B1, RR_B1); }
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| ^^^^^ 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
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--> $DIR/issue-62307-match-ref-ref-forbidden-without-eq.rs:22:1
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LL | impl PartialEq for B {
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| ^^^^^^^^^^^^^^^^^^^^
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error: aborting due to 2 previous errors
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