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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/objects-coerce-freeze-borrored.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/objects-coerce-freeze-borrored.rs')
-rw-r--r-- | tests/ui/objects-coerce-freeze-borrored.rs | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/tests/ui/objects-coerce-freeze-borrored.rs b/tests/ui/objects-coerce-freeze-borrored.rs new file mode 100644 index 000000000..704d77480 --- /dev/null +++ b/tests/ui/objects-coerce-freeze-borrored.rs @@ -0,0 +1,40 @@ +// run-pass +// Test that we can coerce an `@Object` to an `&Object` + + +trait Foo { + fn foo(&self) -> usize; + fn bar(&mut self) -> usize; +} + +impl Foo for usize { + fn foo(&self) -> usize { + *self + } + + fn bar(&mut self) -> usize { + *self += 1; + *self + } +} + +fn do_it_mut(obj: &mut dyn Foo) { + let x = obj.bar(); + let y = obj.foo(); + assert_eq!(x, y); + + do_it_imm(obj, y); +} + +fn do_it_imm(obj: &dyn Foo, v: usize) { + let y = obj.foo(); + assert_eq!(v, y); +} + +pub fn main() { + let mut x: usize = 22; + let obj = &mut x as &mut dyn Foo; + do_it_mut(obj); + do_it_imm(obj, 23); + do_it_mut(obj); +} |