mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 15:23:46 +00:00
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.
22 lines
528 B
Plaintext
22 lines
528 B
Plaintext
error: unconstrained generic constant
|
|
--> $DIR/ensure_is_evaluatable.rs:9:5
|
|
|
|
|
LL | bar()
|
|
| ^^^^^
|
|
|
|
|
note: required by a bound in `bar`
|
|
--> $DIR/ensure_is_evaluatable.rs:15:10
|
|
|
|
|
LL | fn bar<const N: usize>() -> [(); N]
|
|
| --- required by a bound in this function
|
|
LL | where
|
|
LL | [(); N + 1]:,
|
|
| ^^^^^ required by this bound in `bar`
|
|
help: try adding a `where` bound
|
|
|
|
|
LL | [(); M + 1]:, [(); N + 1]:
|
|
| ~~~~~~~~~~~~~~
|
|
|
|
error: aborting due to 1 previous error
|
|
|