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Internal compiler error when using Self in type definitions. #56199
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Possibly fixed by #56205. Verify after that PR is merged and add regression test. |
I'd like to handle the verification & test. |
Thanks @kevgrasso, that would be great! |
I tried compiling it with the nightly toolchain and it still panicked:
for the sample code:
Would you still want me to do a regression test for this, even though it's still bugged? |
@kevgrasso we probably should fix the bug, we normally don't add tests for ICEs that haven't been fixed. CC @alexreg follow up to #56365. |
On a related note, this also fails (see #56611): #![feature(self_struct_ctor)]
struct Foo {}
impl Foo {
fn bar() {
Self()
}
} with
|
I've fixed all of the above cases in #56225 now. |
Implement RFC 2338, "Type alias enum variants" This PR implements [RFC 2338](rust-lang/rfcs#2338), allowing one to write code like the following. ```rust #![feature(type_alias_enum_variants)] enum Foo { Bar(i32), Baz { i: i32 }, } type Alias = Foo; fn main() { let t = Alias::Bar(0); let t = Alias::Baz { i: 0 }; match t { Alias::Bar(_i) => {} Alias::Baz { i: _i } => {} } } ``` Since `Self` can be considered a type alias in this context, it also enables using `Self::Variant` as both a constructor and pattern. Fixes issues #56199 and #56611. N.B., after discussing the syntax for type arguments on enum variants with @petrochenkov and @eddyb (there are also a few comments on the [tracking issue](#49683)), the consensus seems to be treat the syntax as follows, which ought to be backwards-compatible. ```rust Option::<u8>::None; // OK Option::None::<u8>; // OK, but lint in near future (hard error next edition?) Alias::<u8>::None; // OK Alias::None::<u8>; // Error ``` I do not know if this will need an FCP, but let's start one if so. r? @petrochenkov
Implement RFC 2338, "Type alias enum variants" This PR implements [RFC 2338](rust-lang/rfcs#2338), allowing one to write code like the following. ```rust #![feature(type_alias_enum_variants)] enum Foo { Bar(i32), Baz { i: i32 }, } type Alias = Foo; fn main() { let t = Alias::Bar(0); let t = Alias::Baz { i: 0 }; match t { Alias::Bar(_i) => {} Alias::Baz { i: _i } => {} } } ``` Since `Self` can be considered a type alias in this context, it also enables using `Self::Variant` as both a constructor and pattern. Fixes issues #56199 and #56611. N.B., after discussing the syntax for type arguments on enum variants with @petrochenkov and @eddyb (there are also a few comments on the [tracking issue](#49683)), the consensus seems to be treat the syntax as follows, which ought to be backwards-compatible. ```rust Option::<u8>::None; // OK Option::None::<u8>; // OK, but lint in near future (hard error next edition?) Alias::<u8>::None; // OK Alias::None::<u8>; // Error ``` I do not know if this will need an FCP, but let's start one if so.
@alexreg should this be closed? |
The output of the original issue is now:
|
As I commented is the issue #51994 a variant of what is not being stabilized gave me an internal compiler error.
Code:
Compiler output:
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