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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:20:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:20:29 +0000 |
commit | 631cd5845e8de329d0e227aaa707d7ea228b8f8f (patch) | |
tree | a1b87c8f8cad01cf18f7c5f57a08f102771ed303 /tests/ui/traits/trait-upcasting | |
parent | Adding debian version 1.69.0+dfsg1-1. (diff) | |
download | rustc-631cd5845e8de329d0e227aaa707d7ea228b8f8f.tar.xz rustc-631cd5845e8de329d0e227aaa707d7ea228b8f8f.zip |
Merging upstream version 1.70.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/traits/trait-upcasting')
3 files changed, 49 insertions, 7 deletions
diff --git a/tests/ui/traits/trait-upcasting/alias-where-clause-isnt-supertrait.rs b/tests/ui/traits/trait-upcasting/alias-where-clause-isnt-supertrait.rs new file mode 100644 index 000000000..4a5e445d1 --- /dev/null +++ b/tests/ui/traits/trait-upcasting/alias-where-clause-isnt-supertrait.rs @@ -0,0 +1,33 @@ +#![feature(trait_upcasting)] +#![feature(trait_alias)] + +// Although we *elaborate* `T: Alias` to `i32: B`, we should +// not consider `B` to be a supertrait of the type. +trait Alias = A where i32: B; + +trait A {} + +trait B { + fn test(&self); +} + +trait C: Alias {} + +impl A for () {} + +impl C for () {} + +impl B for i32 { + fn test(&self) { + println!("hi {self}"); + } +} + +fn test(x: &dyn C) -> &dyn B { + x + //~^ ERROR mismatched types +} + +fn main() { + let x: &dyn C = &(); +} diff --git a/tests/ui/traits/trait-upcasting/alias-where-clause-isnt-supertrait.stderr b/tests/ui/traits/trait-upcasting/alias-where-clause-isnt-supertrait.stderr new file mode 100644 index 000000000..5574a0320 --- /dev/null +++ b/tests/ui/traits/trait-upcasting/alias-where-clause-isnt-supertrait.stderr @@ -0,0 +1,14 @@ +error[E0308]: mismatched types + --> $DIR/alias-where-clause-isnt-supertrait.rs:27:5 + | +LL | fn test(x: &dyn C) -> &dyn B { + | ------ expected `&dyn B` because of return type +LL | x + | ^ expected trait `B`, found trait `C` + | + = note: expected reference `&dyn B` + found reference `&dyn C` + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0308`. diff --git a/tests/ui/traits/trait-upcasting/cyclic-trait-resolution.stderr b/tests/ui/traits/trait-upcasting/cyclic-trait-resolution.stderr index 15faab16a..ca98e1831 100644 --- a/tests/ui/traits/trait-upcasting/cyclic-trait-resolution.stderr +++ b/tests/ui/traits/trait-upcasting/cyclic-trait-resolution.stderr @@ -1,15 +1,10 @@ error[E0391]: cycle detected when computing the super predicates of `A` - --> $DIR/cyclic-trait-resolution.rs:1:1 - | -LL | trait A: B + A {} - | ^^^^^^^^^^^^^^ - | -note: ...which requires computing the super traits of `A`... --> $DIR/cyclic-trait-resolution.rs:1:14 | LL | trait A: B + A {} | ^ - = note: ...which again requires computing the super predicates of `A`, completing the cycle + | + = note: ...which immediately requires computing the super predicates of `A` again note: cycle used when collecting item types in top-level module --> $DIR/cyclic-trait-resolution.rs:1:1 | |