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Improve selection errors for ~const trait bounds

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Deadbeef 2021-12-24 22:50:44 +08:00
parent 17dfae79bb
commit fdf7d01088
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23 changed files with 323 additions and 203 deletions
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26
src/test/ui/rfc-2632-const-trait-impl/const-drop-fail.precise.stderr
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@ -1,26 +1,32 @@
error[E0277]: the trait bound `NonTrivialDrop: Drop` is not satisfied
error[E0277]: the trait bound `NonTrivialDrop: ~const Drop` is not satisfied
--> $DIR/const-drop-fail.rs:44:5
|
LL | const _: () = check($exp);
| ----- required by a bound introduced by this call
...
LL | NonTrivialDrop,
| ^^^^^^^^^^^^^^ the trait `Drop` is not implemented for `NonTrivialDrop`
| ^^^^^^^^^^^^^^ expected an implementor of trait `~const Drop`
|
note: required by a bound in `check`
--> $DIR/const-drop-fail.rs:35:19
|
LL | const fn check<T: ~const Drop>(_: T) {}
| ^^^^^^^^^^^ required by this bound in `check`
help: consider borrowing here
|
LL | &NonTrivialDrop,
| +
LL | &mut NonTrivialDrop,
| ++++
error[E0277]: the trait bound `NonTrivialDrop: Drop` is not satisfied in `ConstImplWithDropGlue`
error[E0277]: the trait bound `NonTrivialDrop: ~const Drop` is not satisfied in `ConstImplWithDropGlue`
--> $DIR/const-drop-fail.rs:46:5
|
LL | const _: () = check($exp);
| ----- required by a bound introduced by this call
...
LL | ConstImplWithDropGlue(NonTrivialDrop),
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ within `ConstImplWithDropGlue`, the trait `Drop` is not implemented for `NonTrivialDrop`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ within `ConstImplWithDropGlue`, the trait `~const Drop` is not implemented for `NonTrivialDrop`
|
note: required because it appears within the type `ConstImplWithDropGlue`
--> $DIR/const-drop-fail.rs:17:8
@ -33,16 +39,16 @@ note: required by a bound in `check`
LL | const fn check<T: ~const Drop>(_: T) {}
| ^^^^^^^^^^^ required by this bound in `check`
error[E0277]: the trait bound `NonTrivialDrop: A` is not satisfied
error[E0277]: the trait bound `ConstDropImplWithBounds<NonTrivialDrop>: ~const Drop` is not satisfied
--> $DIR/const-drop-fail.rs:48:5
|
LL | const _: () = check($exp);
| ----- required by a bound introduced by this call
...
LL | ConstDropImplWithBounds::<NonTrivialDrop>(PhantomData),
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `A` is not implemented for `NonTrivialDrop`
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected an implementor of trait `~const Drop`
|
note: required because of the requirements on the impl of `Drop` for `ConstDropImplWithBounds<NonTrivialDrop>`
note: required because of the requirements on the impl of `~const Drop` for `ConstDropImplWithBounds<NonTrivialDrop>`
--> $DIR/const-drop-fail.rs:29:25
|
LL | impl<T: ~const A> const Drop for ConstDropImplWithBounds<T> {
@ -52,6 +58,12 @@ note: required by a bound in `check`
|
LL | const fn check<T: ~const Drop>(_: T) {}
| ^^^^^^^^^^^ required by this bound in `check`
help: consider borrowing here
|
LL | &ConstDropImplWithBounds::<NonTrivialDrop>(PhantomData),
| +
LL | &mut ConstDropImplWithBounds::<NonTrivialDrop>(PhantomData),
| ++++
error: aborting due to 3 previous errors