mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-11 08:05:12 +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.
14 lines
456 B
Plaintext
14 lines
456 B
Plaintext
error: unconstrained generic constant
|
|
--> $DIR/issue-67739.rs:11:15
|
|
|
|
|
LL | [0u8; mem::size_of::<Self::Associated>()];
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
|
help: try adding a `where` bound
|
|
|
|
|
LL | fn associated_size(&self) -> usize where [(); mem::size_of::<Self::Associated>()]: {
|
|
| +++++++++++++++++++++++++++++++++++++++++++++++
|
|
|
|
error: aborting due to 1 previous error
|
|
|