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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/traits/normalize-supertrait.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/test/ui/traits/normalize-supertrait.rs | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/test/ui/traits/normalize-supertrait.rs b/src/test/ui/traits/normalize-supertrait.rs new file mode 100644 index 000000000..021a93eac --- /dev/null +++ b/src/test/ui/traits/normalize-supertrait.rs @@ -0,0 +1,37 @@ +// Regression test for #77653 +// When monomorphizing `f` we need to prove `dyn Derived<()>: Base<()>`. This +// requires us to normalize the `Base<<() as Proj>::S>` to `Base<()>` when +// comparing the supertrait `Derived<()>` to the expected trait. + +// build-pass + +trait Proj { + type S; +} + +impl Proj for () { + type S = (); +} + +impl Proj for i32 { + type S = i32; +} + +trait Base<T> { + fn is_base(&self); +} + +trait Derived<B: Proj>: Base<B::S> + Base<()> { + fn is_derived(&self); +} + +fn f<P: Proj>(obj: &dyn Derived<P>) { + obj.is_derived(); + Base::<P::S>::is_base(obj); + Base::<()>::is_base(obj); +} + +fn main() { + let x: fn(_) = f::<()>; + let x: fn(_) = f::<i32>; +} |