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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/overloaded/overloaded-autoderef-vtable.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 'src/test/ui/overloaded/overloaded-autoderef-vtable.rs')
-rw-r--r-- | src/test/ui/overloaded/overloaded-autoderef-vtable.rs | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/test/ui/overloaded/overloaded-autoderef-vtable.rs b/src/test/ui/overloaded/overloaded-autoderef-vtable.rs new file mode 100644 index 000000000..f8e6d1208 --- /dev/null +++ b/src/test/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); +} |