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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/return/issue-82612-return-mutable-reference.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/return/issue-82612-return-mutable-reference.rs')
-rw-r--r-- | tests/ui/return/issue-82612-return-mutable-reference.rs | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/tests/ui/return/issue-82612-return-mutable-reference.rs b/tests/ui/return/issue-82612-return-mutable-reference.rs new file mode 100644 index 000000000..db0d08ddb --- /dev/null +++ b/tests/ui/return/issue-82612-return-mutable-reference.rs @@ -0,0 +1,24 @@ +// Regression test for #82612. + +use std::marker::PhantomData; + +pub trait SparseSetIndex { + fn sparse_set_index(&self) -> usize; +} +pub struct SparseArray<I, V = I> { + values: Vec<Option<V>>, + marker: PhantomData<I>, +} + +impl<I: SparseSetIndex, V> SparseArray<I, V> { + pub fn get_or_insert_with(&mut self, index: I, func: impl FnOnce() -> V) -> &mut V { + let index = index.sparse_set_index(); + if index < self.values.len() { + let value = unsafe { self.values.get_unchecked_mut(index) }; + value.get_or_insert_with(func) //~ ERROR mismatched types + } + unsafe { self.values.get_unchecked_mut(index).as_mut().unwrap() } + } +} + +fn main() {} |