6b24fdf811
```
error: unconstrained generic constant
--> $DIR/const-argument-if-length.rs:18:10
|
LL | pad: [u8; is_zst::<T>()],
| ^^^^^^^^^^^^^^^^^^^
|
help: try adding a `where` bound
|
LL | pub struct AtLeastByte<T: ?Sized> where [(); is_zst::<T>()]: {
| ++++++++++++++++++++++++++
```
Detect when the constant expression isn't `usize` and suggest casting:
```
error: unconstrained generic constant
--> f300.rs:6:10
|
6 | bb::<{!N}>();
| ^^^^
-Ztrack-diagnostics: created at compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs:3539:36
|
help: try adding a `where` bound
|
5 | fn b<const N: bool>() where [(); {!N} as usize]: {
| ++++++++++++++++++++++++++
```
Fix #122395.
|
||
|---|---|---|
| .. | ||
| issue_114151.rs | ||
| issue_114151.stderr | ||
| relate_binop_arg_tys.rs | ||
| relate_binop_arg_tys.stderr | ||
| relate_cast_arg_ty.rs | ||
| relate_cast_arg_ty.stderr | ||
| relate_ty_with_infer_1.rs | ||
| relate_ty_with_infer_2.rs | ||
| wf_obligation.rs | ||
| wf_obligation.stderr | ||