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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:20:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:20:29 +0000 |
commit | 631cd5845e8de329d0e227aaa707d7ea228b8f8f (patch) | |
tree | a1b87c8f8cad01cf18f7c5f57a08f102771ed303 /tests/ui/traits/new-solver/specialization-transmute.rs | |
parent | Adding debian version 1.69.0+dfsg1-1. (diff) | |
download | rustc-631cd5845e8de329d0e227aaa707d7ea228b8f8f.tar.xz rustc-631cd5845e8de329d0e227aaa707d7ea228b8f8f.zip |
Merging upstream version 1.70.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/traits/new-solver/specialization-transmute.rs')
-rw-r--r-- | tests/ui/traits/new-solver/specialization-transmute.rs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/tests/ui/traits/new-solver/specialization-transmute.rs b/tests/ui/traits/new-solver/specialization-transmute.rs new file mode 100644 index 000000000..a54701df4 --- /dev/null +++ b/tests/ui/traits/new-solver/specialization-transmute.rs @@ -0,0 +1,30 @@ +// compile-flags: -Ztrait-solver=next + +#![feature(specialization)] +//~^ WARN the feature `specialization` is incomplete + +trait Default { + type Id; + + fn intu(&self) -> &Self::Id; +} + +impl<T> Default for T { + default type Id = T; + + fn intu(&self) -> &Self::Id { + self + //~^ ERROR cannot satisfy `T <: <T as Default>::Id` + } +} + +fn transmute<T: Default<Id = U>, U: Copy>(t: T) -> U { + *t.intu() +} + +use std::num::NonZeroU8; +fn main() { + let s = transmute::<u8, Option<NonZeroU8>>(0); + //~^ ERROR cannot satisfy `<u8 as Default>::Id == Option<NonZeroU8> + assert_eq!(s, None); +} |