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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-30 03:57:31 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-30 03:57:31 +0000 |
commit | dc0db358abe19481e475e10c32149b53370f1a1c (patch) | |
tree | ab8ce99c4b255ce46f99ef402c27916055b899ee /tests/ui/type-alias-impl-trait/higher_kinded_params3.rs | |
parent | Releasing progress-linux version 1.71.1+dfsg1-2~progress7.99u1. (diff) | |
download | rustc-dc0db358abe19481e475e10c32149b53370f1a1c.tar.xz rustc-dc0db358abe19481e475e10c32149b53370f1a1c.zip |
Merging upstream version 1.72.1+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/type-alias-impl-trait/higher_kinded_params3.rs')
-rw-r--r-- | tests/ui/type-alias-impl-trait/higher_kinded_params3.rs | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/tests/ui/type-alias-impl-trait/higher_kinded_params3.rs b/tests/ui/type-alias-impl-trait/higher_kinded_params3.rs new file mode 100644 index 000000000..6edfccaf7 --- /dev/null +++ b/tests/ui/type-alias-impl-trait/higher_kinded_params3.rs @@ -0,0 +1,36 @@ +//! This test checks that we can't actually have an opaque type behind +//! a binder that references variables from that binder. + +// edition: 2021 + +#![feature(type_alias_impl_trait)] + +trait B { + type C; +} + +struct A; + +impl<'a> B for &'a A { + type C = Tait<'a>; +} + +type Tait<'a> = impl std::fmt::Debug + 'a; + +struct Terminator; + +type Successors<'a> = impl std::fmt::Debug + 'a; + +impl Terminator { + fn successors(&self, mut f: for<'x> fn(&'x ()) -> <&'x A as B>::C) -> Successors<'_> { + f = g; + //~^ ERROR mismatched types + //~| ERROR item constrains opaque type that is not in its signature + } +} + +fn g(x: &()) -> &() { + x +} + +fn main() {} |