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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/traits/trait-upcasting/correct-supertrait-substitution.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/test/ui/traits/trait-upcasting/correct-supertrait-substitution.rs | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/test/ui/traits/trait-upcasting/correct-supertrait-substitution.rs b/src/test/ui/traits/trait-upcasting/correct-supertrait-substitution.rs new file mode 100644 index 000000000..8d0a9ef0a --- /dev/null +++ b/src/test/ui/traits/trait-upcasting/correct-supertrait-substitution.rs @@ -0,0 +1,39 @@ +// run-pass +#![feature(trait_upcasting)] +#![allow(incomplete_features)] + +trait Foo<T: Default + ToString>: Bar<i32> + Bar<T> {} +trait Bar<T: Default + ToString> { + fn bar(&self) -> String { + T::default().to_string() + } +} + +struct S1; + +impl Bar<i32> for S1 {} +impl Foo<i32> for S1 {} + +struct S2; +impl Bar<i32> for S2 {} +impl Bar<bool> for S2 {} +impl Foo<bool> for S2 {} + +fn test1(x: &dyn Foo<i32>) { + let s = x as &dyn Bar<i32>; + assert_eq!("0", &s.bar().to_string()); +} + +fn test2(x: &dyn Foo<bool>) { + let p = x as &dyn Bar<i32>; + assert_eq!("0", &p.bar().to_string()); + let q = x as &dyn Bar<bool>; + assert_eq!("false", &q.bar().to_string()); +} + +fn main() { + let s1 = S1; + test1(&s1); + let s2 = S2; + test2(&s2); +} |