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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/ui/associated-types/associated-types-return.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/associated-types/associated-types-return.rs')
-rw-r--r-- | tests/ui/associated-types/associated-types-return.rs | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/tests/ui/associated-types/associated-types-return.rs b/tests/ui/associated-types/associated-types-return.rs new file mode 100644 index 000000000..997a48b03 --- /dev/null +++ b/tests/ui/associated-types/associated-types-return.rs @@ -0,0 +1,46 @@ +// run-pass +// Test equality constraints on associated types in a where clause. + + +pub trait Foo { + type A; + fn boo(&self) -> <Self as Foo>::A; +} + +#[derive(PartialEq, Debug)] +pub struct Bar; + +impl Foo for isize { + type A = usize; + fn boo(&self) -> usize { 42 } +} + +impl Foo for Bar { + type A = isize; + fn boo(&self) -> isize { 43 } +} + +impl Foo for char { + type A = Bar; + fn boo(&self) -> Bar { Bar } +} + +fn foo1<I: Foo<A=Bar>>(x: I) -> Bar { + x.boo() +} + +fn foo2<I: Foo>(x: I) -> <I as Foo>::A { + x.boo() +} + +pub fn main() { + let a = 42; + assert_eq!(foo2(a), 42); + + let a = Bar; + assert_eq!(foo2(a), 43); + + let a = 'a'; + foo1(a); + assert_eq!(foo2(a), Bar); +} |