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rust/tests/ui/consts/const_in_pattern/no-eq-branch-fail.stderr

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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 `Foo` in a pattern
remove IndirectStructuralMatch lint, emit the usual hard error instead
2024-05-03 15:24:53 +02:00
--> $DIR/no-eq-branch-fail.rs:19:9
Add branchy `const` in pattern tests
2020-04-07 12:11:29 -07:00
|
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 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ```
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LL | enum Foo {
| -------- `Foo` must be annotated with `#[derive(PartialEq)]` to be usable in patterns
...
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 BAR_BAZ: Foo = if 42 == 42 {
| ------------------ constant defined here
...
Add branchy `const` in pattern tests
2020-04-07 12:11:29 -07:00
LL | BAR_BAZ => panic!(),
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 { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ```
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| ^^^^^^^ constant of non-structural type
Add notes to non-structural const in pattern error message
2023-03-27 10:14:08 -04:00
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remove StructuralEq trait
2023-09-26 09:39:41 +02:00
= note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralPartialEq.html for details
Add branchy `const` in pattern tests
2020-04-07 12:11:29 -07:00
Show number in error message even for one error Co-authored-by: Adrian <adrian.iosdev@gmail.com>
2023-11-21 15:44:16 +00:00
error: aborting due to 1 previous error
Add branchy `const` in pattern tests
2020-04-07 12:11:29 -07:00
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