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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/specialization/issue-70442.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/specialization/issue-70442.rs')
-rw-r--r-- | tests/ui/specialization/issue-70442.rs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/tests/ui/specialization/issue-70442.rs b/tests/ui/specialization/issue-70442.rs new file mode 100644 index 000000000..d41b5355c --- /dev/null +++ b/tests/ui/specialization/issue-70442.rs @@ -0,0 +1,23 @@ +#![feature(specialization)] //~ WARN the feature `specialization` is incomplete + +// check-pass + +trait Trait { + type Assoc; +} + +impl<T> Trait for T { + default type Assoc = bool; +} + +// This impl inherits the `Assoc` definition from above and "locks it in", or finalizes it, making +// child impls unable to further specialize it. However, since the specialization graph didn't +// correctly track this, we would refuse to project `Assoc` from this impl, even though that should +// happen for items that are final. +impl Trait for () {} + +fn foo<X: Trait<Assoc=bool>>() {} + +fn main() { + foo::<()>(); // `<() as Trait>::Assoc` is normalized to `bool` correctly +} |