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rust/tests/ui/const-generics/generic_const_exprs/no_where_clause.stderr

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Add better diagnostic for missing where clause Previously, it's not clear what exactly should be added in the suggested where clause, so this adds an example to demonstrate.
2021-01-30 03:45:18 +00:00
error: unconstrained generic constant
--> $DIR/no_where_clause.rs:10:6
|
LL | b: [f32; complex_maths(N)],
| ^^^^^^^^^^^^^^^^^^^^^^^
|
Provide structured suggestion for unconstrained generic constant ``` 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.
2024-03-21 00:03:59 +00:00
help: try adding a `where` bound
|
LL | pub struct Example<const N: usize> where [(); complex_maths(N)]: {
| +++++++++++++++++++++++++++++
Add better diagnostic for missing where clause Previously, it's not clear what exactly should be added in the suggested where clause, so this adds an example to demonstrate.
2021-01-30 03:45:18 +00:00
WF-check struct field types at construction site Rustc of course already WF-checked the field types at the definition site, but for error tainting of consts to work properly, there needs to be an error emitted at the use site. Previously, with no use-site error, we proceeded with CTFE and ran into ICEs since we are running code with type errors. Emitting use-site errors also brings struct-like constructors more in line with fn-like constructors since they already emit use-site errors for WF issues.
2024-08-05 17:26:46 -07:00
error: unconstrained generic constant
--> $DIR/no_where_clause.rs:18:10
|
LL | b: [0.; complex_maths(N)],
| ^^^^^^^^^^^^^^^^^^^^^^
|
help: try adding a `where` bound
|
LL | pub fn new() -> Self where [(); complex_maths(N)]: {
| +++++++++++++++++++++++++++++
Continue compilation after check_mod_type_wf errors
2024-02-09 12:17:55 +00:00
error: unconstrained generic constant
--> $DIR/no_where_clause.rs:18:15
|
LL | b: [0.; complex_maths(N)],
| ^^^^^^^^^^^^^^^^
|
Provide structured suggestion for unconstrained generic constant ``` 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.
2024-03-21 00:03:59 +00:00
help: try adding a `where` bound
|
LL | pub fn new() -> Self where [(); complex_maths(N)]: {
| +++++++++++++++++++++++++++++
Continue compilation after check_mod_type_wf errors
2024-02-09 12:17:55 +00:00
WF-check struct field types at construction site Rustc of course already WF-checked the field types at the definition site, but for error tainting of consts to work properly, there needs to be an error emitted at the use site. Previously, with no use-site error, we proceeded with CTFE and ran into ICEs since we are running code with type errors. Emitting use-site errors also brings struct-like constructors more in line with fn-like constructors since they already emit use-site errors for WF issues.
2024-08-05 17:26:46 -07:00
error: aborting due to 3 previous errors
Add better diagnostic for missing where clause Previously, it's not clear what exactly should be added in the suggested where clause, so this adds an example to demonstrate.
2021-01-30 03:45:18 +00:00
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