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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/overloaded/overloaded-autoderef-vtable.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/overloaded/overloaded-autoderef-vtable.rs')
-rw-r--r-- | tests/ui/overloaded/overloaded-autoderef-vtable.rs | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/tests/ui/overloaded/overloaded-autoderef-vtable.rs b/tests/ui/overloaded/overloaded-autoderef-vtable.rs new file mode 100644 index 000000000..f8e6d1208 --- /dev/null +++ b/tests/ui/overloaded/overloaded-autoderef-vtable.rs @@ -0,0 +1,39 @@ +// run-pass +#![allow(dead_code)] + +use std::ops::Deref; + +struct DerefWithHelper<H, T> { + helper: H, + value: T +} + +trait Helper<T> { + fn helper_borrow(&self) -> &T; +} + +impl<T> Helper<T> for Option<T> { + fn helper_borrow(&self) -> &T { + self.as_ref().unwrap() + } +} + +impl<T, H: Helper<T>> Deref for DerefWithHelper<H, T> { + type Target = T; + + fn deref(&self) -> &T { + self.helper.helper_borrow() + } +} + +struct Foo {x: isize} + +impl Foo { + fn foo(&self) -> isize {self.x} +} + +pub fn main() { + let x: DerefWithHelper<Option<Foo>, Foo> = + DerefWithHelper { helper: Some(Foo {x: 5}), value: Foo { x: 2 } }; + assert_eq!(x.foo(), 5); +} |