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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/closures/issue-23012-supertrait-signature-inference.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/closures/issue-23012-supertrait-signature-inference.rs')
-rw-r--r-- | tests/ui/closures/issue-23012-supertrait-signature-inference.rs | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/tests/ui/closures/issue-23012-supertrait-signature-inference.rs b/tests/ui/closures/issue-23012-supertrait-signature-inference.rs new file mode 100644 index 000000000..5899b703e --- /dev/null +++ b/tests/ui/closures/issue-23012-supertrait-signature-inference.rs @@ -0,0 +1,29 @@ +// check-pass +// Checks that we can infer a closure signature even if the `FnOnce` bound is +// a supertrait of the obligations we have currently registered for the Ty var. + +pub trait Receive<T, E>: FnOnce(Result<T, E>) { + fn receive(self, res: Result<T, E>); +} + +impl<T, E, F: FnOnce(Result<T, E>)> Receive<T, E> for F { + fn receive(self, res: Result<T, E>) { + self(res) + } +} + +pub trait Async<T, E> { + fn receive<F: Receive<T, E>>(self, f: F); +} + +impl<T, E> Async<T, E> for Result<T, E> { + fn receive<F: Receive<T, E>>(self, f: F) { + f(self) + } +} + +pub fn main() { + Ok::<u32, ()>(123).receive(|res| { + res.unwrap(); + }); +} |