6b24fdf811
```
error: unconstrained generic constant
--> $DIR/const-argument-if-length.rs:18:10
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LL | pad: [u8; is_zst::<T>()],
| ^^^^^^^^^^^^^^^^^^^
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help: try adding a `where` bound
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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
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6 | bb::<{!N}>();
| ^^^^
-Ztrack-diagnostics: created at compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs:3539:36
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help: try adding a `where` bound
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5 | fn b<const N: bool>() where [(); {!N} as usize]: {
| ++++++++++++++++++++++++++
```
Fix #122395.
38 lines
1.2 KiB
Plaintext
38 lines
1.2 KiB
Plaintext
error[E0308]: method not compatible with trait
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--> $DIR/issue-83765.rs:30:5
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LL | fn size(&self) -> [usize; DIM] {
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `Self::DIM`, found `DIM`
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= note: expected constant `Self::DIM`
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found constant `DIM`
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error: unconstrained generic constant
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--> $DIR/issue-83765.rs:32:24
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LL | self.reference.size()
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| ^^^^
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note: required by a bound in `TensorSize::size`
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--> $DIR/issue-83765.rs:9:31
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LL | fn size(&self) -> [usize; Self::DIM];
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| ^^^^^^^^^ required by this bound in `TensorSize::size`
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help: try adding a `where` bound
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LL | fn size(&self) -> [usize; DIM] where [(); Self::DIM]: {
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| ++++++++++++++++++++++
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error[E0308]: mismatched types
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--> $DIR/issue-83765.rs:32:9
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LL | self.reference.size()
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| ^^^^^^^^^^^^^^^^^^^^^ expected `DIM`, found `Self::DIM`
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= note: expected constant `DIM`
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found constant `Self::DIM`
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error: aborting due to 3 previous errors
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For more information about this error, try `rustc --explain E0308`.
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