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rustc_middle: Pretty-print negative bounds correctly
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24 changes: 24 additions & 0 deletions
24
tests/ui/traits/negative-bounds/opaque-type-unsatisfied-bound.rs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
| // compile-flags: -Znext-solver | ||
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| #![feature(negative_bounds, negative_impls)] | ||
| //~^ WARN the feature `negative_bounds` is incomplete and may not be safe to use and/or cause compiler crashes | ||
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| trait Trait {} | ||
| impl !Trait for () {} | ||
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| fn produce() -> impl !Trait {} | ||
| fn consume(_: impl Trait) {} | ||
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| fn main() { | ||
| consume(produce()); //~ ERROR the trait bound `impl !Trait: Trait` is not satisfied | ||
| } | ||
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| fn weird0() -> impl Sized + !Sized {} | ||
| //~^ ERROR mismatched types | ||
| //~| ERROR type mismatch resolving `() == impl !Sized` | ||
| fn weird1() -> impl Sized + !Sized {} | ||
| //~^ ERROR mismatched types | ||
| //~| ERROR type mismatch resolving `() == impl !Sized` | ||
| fn weird2() -> impl !Sized + Sized {} | ||
| //~^ ERROR mismatched types | ||
| //~| ERROR type mismatch resolving `() == impl !Sized` |
77 changes: 77 additions & 0 deletions
77
tests/ui/traits/negative-bounds/opaque-type-unsatisfied-bound.stderr
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| warning: the feature `negative_bounds` is incomplete and may not be safe to use and/or cause compiler crashes | ||
| --> $DIR/opaque-type-unsatisfied-bound.rs:3:12 | ||
| | | ||
| LL | #![feature(negative_bounds, negative_impls)] | ||
| | ^^^^^^^^^^^^^^^ | ||
| | | ||
| = note: `#[warn(incomplete_features)]` on by default | ||
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| error[E0308]: mismatched types | ||
| --> $DIR/opaque-type-unsatisfied-bound.rs:16:36 | ||
| | | ||
| LL | fn weird0() -> impl Sized + !Sized {} | ||
| | ------------------- ^^ types differ | ||
| | | | ||
| | the expected opaque type | ||
| | | ||
| = note: expected opaque type `impl !Sized` | ||
| found unit type `()` | ||
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| error[E0271]: type mismatch resolving `() == impl !Sized` | ||
| --> $DIR/opaque-type-unsatisfied-bound.rs:16:16 | ||
| | | ||
| LL | fn weird0() -> impl Sized + !Sized {} | ||
| | ^^^^^^^^^^^^^^^^^^^ types differ | ||
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| error[E0308]: mismatched types | ||
| --> $DIR/opaque-type-unsatisfied-bound.rs:19:36 | ||
| | | ||
| LL | fn weird1() -> impl Sized + !Sized {} | ||
| | ------------------- ^^ types differ | ||
| | | | ||
| | the expected opaque type | ||
| | | ||
| = note: expected opaque type `impl !Sized` | ||
| found unit type `()` | ||
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| error[E0271]: type mismatch resolving `() == impl !Sized` | ||
| --> $DIR/opaque-type-unsatisfied-bound.rs:19:16 | ||
| | | ||
| LL | fn weird1() -> impl Sized + !Sized {} | ||
| | ^^^^^^^^^^^^^^^^^^^ types differ | ||
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| error[E0308]: mismatched types | ||
| --> $DIR/opaque-type-unsatisfied-bound.rs:22:36 | ||
| | | ||
| LL | fn weird2() -> impl !Sized + Sized {} | ||
| | ------------------- ^^ types differ | ||
| | | | ||
| | the expected opaque type | ||
| | | ||
| = note: expected opaque type `impl !Sized` | ||
| found unit type `()` | ||
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| error[E0271]: type mismatch resolving `() == impl !Sized` | ||
| --> $DIR/opaque-type-unsatisfied-bound.rs:22:16 | ||
| | | ||
| LL | fn weird2() -> impl !Sized + Sized {} | ||
| | ^^^^^^^^^^^^^^^^^^^ types differ | ||
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| error[E0277]: the trait bound `impl !Trait: Trait` is not satisfied | ||
| --> $DIR/opaque-type-unsatisfied-bound.rs:13:13 | ||
| | | ||
| LL | consume(produce()); | ||
| | ------- ^^^^^^^^^ the trait `Trait` is not implemented for `impl !Trait` | ||
| | | | ||
| | required by a bound introduced by this call | ||
| | | ||
| note: required by a bound in `consume` | ||
| --> $DIR/opaque-type-unsatisfied-bound.rs:10:20 | ||
| | | ||
| LL | fn consume(_: impl Trait) {} | ||
| | ^^^^^ required by this bound in `consume` | ||
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| error: aborting due to 7 previous errors; 1 warning emitted | ||
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| Some errors have detailed explanations: E0271, E0277, E0308. | ||
| For more information about an error, try `rustc --explain E0271`. |
10 changes: 10 additions & 0 deletions
10
tests/ui/traits/negative-bounds/opaque-type-unsatisfied-fn-bound.rs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| // compile-flags: -Znext-solver | ||
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| #![feature(negative_bounds, unboxed_closures)] | ||
| //~^ WARN the feature `negative_bounds` is incomplete and may not be safe to use and/or cause compiler crashes | ||
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| fn produce() -> impl !Fn<(u32,)> {} | ||
| //~^ ERROR mismatched types | ||
| //~| ERROR type mismatch resolving `() == impl !Fn<(u32,)>` | ||
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| fn main() {} |
29 changes: 29 additions & 0 deletions
29
tests/ui/traits/negative-bounds/opaque-type-unsatisfied-fn-bound.stderr
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| @@ -0,0 +1,29 @@ | ||
| warning: the feature `negative_bounds` is incomplete and may not be safe to use and/or cause compiler crashes | ||
| --> $DIR/opaque-type-unsatisfied-fn-bound.rs:3:12 | ||
| | | ||
| LL | #![feature(negative_bounds, unboxed_closures)] | ||
| | ^^^^^^^^^^^^^^^ | ||
| | | ||
| = note: `#[warn(incomplete_features)]` on by default | ||
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| error[E0308]: mismatched types | ||
| --> $DIR/opaque-type-unsatisfied-fn-bound.rs:6:34 | ||
| | | ||
| LL | fn produce() -> impl !Fn<(u32,)> {} | ||
| | ---------------- ^^ types differ | ||
| | | | ||
| | the expected opaque type | ||
| | | ||
| = note: expected opaque type `impl !Fn<(u32,)>` | ||
| found unit type `()` | ||
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| error[E0271]: type mismatch resolving `() == impl !Fn<(u32,)>` | ||
| --> $DIR/opaque-type-unsatisfied-fn-bound.rs:6:17 | ||
| | | ||
| LL | fn produce() -> impl !Fn<(u32,)> {} | ||
| | ^^^^^^^^^^^^^^^^ types differ | ||
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| error: aborting due to 2 previous errors; 1 warning emitted | ||
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| Some errors have detailed explanations: E0271, E0308. | ||
| For more information about an error, try `rustc --explain E0271`. |