rust/tests/ui/consts/issue-89088.stderr

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>` must be annotated with `#[derive(PartialEq)]` to be usable in patterns
   |
   = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralPartialEq.html for details

error: aborting due to 1 previous error
Add additional context for non-sructural type constant used in pattern - 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 { \| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ``` 2024-11-20 04:30:35 +00:00			error: constant of non-structural type `Cow<'_, str>` in a pattern
remove IndirectStructuralMatch lint, emit the usual hard error instead 2024-05-03 15:24:53 +02:00			`--> $DIR/issue-89088.rs:16:9`
update the tracking issue for structural match violations and bless a test I missed 2024-01-27 14:22:56 +01:00			`\|`
On `const` pattern errors, point at the `const` item definition Centralize emitting an error in `const_to_pat` so that all errors from that evaluating a `const` in a pattern can add addditional information. With this, now point at the `const` item's definition: ``` error[E0158]: constant pattern depends on a generic parameter --> $DIR/associated-const-type-parameter-pattern.rs:20:9 \| LL \| pub trait Foo { \| ------------- LL \| const X: EFoo; \| ------------- constant defined here ... LL \| A::X => println!("A::X"), \| ^^^^ ``` 2024-11-20 02:15:21 +00:00			`LL \| const FOO: &A = &A::Field(Cow::Borrowed("foo"));`
			`\| ------------- constant defined here`
			`...`
update the tracking issue for structural match violations and bless a test I missed 2024-01-27 14:22:56 +01:00			`LL \| FOO => todo!(),`
Add additional context for non-sructural type constant used in pattern - 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 { \| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ``` 2024-11-20 04:30:35 +00:00			`\| ^^^ constant of non-structural type`
			`--> $SRC_DIR/alloc/src/borrow.rs:LL:COL`
			`\|`
			= note: `Cow<'_, str>` must be annotated with `#[derive(PartialEq)]` to be usable in patterns
update the tracking issue for structural match violations and bless a test I missed 2024-01-27 14:22:56 +01:00			`\|`
			`= note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralPartialEq.html for details`

remove IndirectStructuralMatch lint, emit the usual hard error instead 2024-05-03 15:24:53 +02:00			`error: aborting due to 1 previous error`