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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/hidden_behind_struct_field.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/hidden_behind_struct_field.rs')
-rw-r--r-- | tests/ui/type-alias-impl-trait/hidden_behind_struct_field.rs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/tests/ui/type-alias-impl-trait/hidden_behind_struct_field.rs b/tests/ui/type-alias-impl-trait/hidden_behind_struct_field.rs new file mode 100644 index 000000000..58778702d --- /dev/null +++ b/tests/ui/type-alias-impl-trait/hidden_behind_struct_field.rs @@ -0,0 +1,30 @@ +//! This test shows that the appearance of an opaque type +//! in the substs of a struct are enough to make it count +//! for making the function a defining use. It doesn't matter +//! if the opaque type is actually used in the field. + +#![feature(impl_trait_in_assoc_type)] +// check-pass + +use std::marker::PhantomData; + +struct Bar; + +trait Trait: Sized { + type Assoc; + fn foo() -> Foo<Self::Assoc>; +} + +impl Trait for Bar { + type Assoc = impl std::fmt::Debug; + fn foo() -> Foo<Self::Assoc> { + let foo: Foo<()> = Foo { field: PhantomData }; + foo + } +} + +struct Foo<T> { + field: PhantomData<T>, +} + +fn main() {} |