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Make sure const params with type params don't cause errors without a feature gate

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varkor 2019-04-25 21:12:03 +01:00
parent 976b3d1d9e
commit 102f7a8b26
2 changed files with 25 additions and 0 deletions
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6
src/test/ui/const-generics/const-param-type-depends-on-type-param-ungated.rs Normal file
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use std::marker::PhantomData;
struct B<T, const N: T>(PhantomData<[T; N]>); //~ ERROR const generics are unstable
//~^ ERROR const parameters cannot depend on type parameters
fn main() {}

19
src/test/ui/const-generics/const-param-type-depends-on-type-param-ungated.stderr Normal file
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error[E0671]: const parameters cannot depend on type parameters
--> $DIR/const-param-type-depends-on-type-param-ungated.rs:3:22
|
LL | struct B<T, const N: T>(PhantomData<[T; N]>);
| ^ const parameter depends on type parameter
error[E0658]: const generics are unstable
--> $DIR/const-param-type-depends-on-type-param-ungated.rs:3:19
|
LL | struct B<T, const N: T>(PhantomData<[T; N]>);
| ^
|
= note: for more information, see https://github.com/rust-lang/rust/issues/44580
= help: add #![feature(const_generics)] to the crate attributes to enable
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0658, E0671.
For more information about an error, try `rustc --explain E0658`.