Repository navigation
Invalid feature suggestion: #[feature(const_generics)] #80702
Description
When writing a const generic that uses a type other than bool, char or integer, the compiler generates the following error message:
error: `std::sync::atomic::Ordering` is forbidden as the type of a const generic parameter
--> src/lib.rs:5:21
|
5 | struct Bug<const O: atomic::Ordering>;
| ^^^^^^^^^^^^^^^^
|
= note: the only supported types are integers, `bool` and `char`
= help: more complex types are supported with `#[feature(const_generics)]`
However, this error message is wrong, as its missing a ! in the feature suggestion.
It should be #![feature(const_generics)] rather than #[feature(const_generics)]
Activity
[-]Invalid feature suggesting[/-]tesuji commentedon Jan 5, 2021
One just need to change this line:
rust/compiler/rustc_typeck/src/check/wfcheck.rs
Line 333 in 61f5a00
then bless respective stderr files.
varkor commentedon Jan 5, 2021
One doesn't even need to build the compiler: a search and replace for
#[feature(const_generics)]insrc/testwould be enough.jakevossen5 commentedon Jan 5, 2021
I can do this quick if that's okay.