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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/issues/issue-55731.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/issues/issue-55731.rs')
-rw-r--r-- | tests/ui/issues/issue-55731.rs | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/tests/ui/issues/issue-55731.rs b/tests/ui/issues/issue-55731.rs new file mode 100644 index 000000000..7b4f4e2cd --- /dev/null +++ b/tests/ui/issues/issue-55731.rs @@ -0,0 +1,52 @@ +use std::marker::PhantomData; + +trait DistributedIterator { + fn reduce(self) + where + Self: Sized, + { + unreachable!() + } +} + +trait DistributedIteratorMulti<Source> { + type Item; +} + +struct Connect<I>(PhantomData<fn(I)>); +impl<I: for<'a> DistributedIteratorMulti<&'a ()>> DistributedIterator for Connect<I> where {} + +struct Cloned<Source>(PhantomData<fn(Source)>); +impl<'a, Source> DistributedIteratorMulti<&'a Source> for Cloned<&'a Source> { + type Item = (); +} + +struct Map<I, F> { + i: I, + f: F, +} +impl<I: DistributedIteratorMulti<Source>, F, Source> DistributedIteratorMulti<Source> for Map<I, F> +where + F: A<<I as DistributedIteratorMulti<Source>>::Item>, +{ + type Item = (); +} + +trait A<B> {} + +struct X; +impl A<()> for X {} + +fn multi<I>(_reducer: I) +where + I: for<'a> DistributedIteratorMulti<&'a ()>, +{ + DistributedIterator::reduce(Connect::<I>(PhantomData)) +} + +fn main() { + multi(Map { //~ ERROR implementation of `DistributedIteratorMulti` is not general enough + i: Cloned(PhantomData), + f: X, + }); +} |