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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:32 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:18:32 +0000 |
commit | 4547b622d8d29df964fa2914213088b148c498fc (patch) | |
tree | 9fc6b25f3c3add6b745be9a2400a6e96140046e9 /src/test/ui/lint/opaque-ty-ffi-normalization-cycle.rs | |
parent | Releasing progress-linux version 1.66.0+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-4547b622d8d29df964fa2914213088b148c498fc.tar.xz rustc-4547b622d8d29df964fa2914213088b148c498fc.zip |
Merging upstream version 1.67.1+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/lint/opaque-ty-ffi-normalization-cycle.rs')
-rw-r--r-- | src/test/ui/lint/opaque-ty-ffi-normalization-cycle.rs | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/src/test/ui/lint/opaque-ty-ffi-normalization-cycle.rs b/src/test/ui/lint/opaque-ty-ffi-normalization-cycle.rs new file mode 100644 index 000000000..c83bca4a4 --- /dev/null +++ b/src/test/ui/lint/opaque-ty-ffi-normalization-cycle.rs @@ -0,0 +1,41 @@ +#![feature(type_alias_impl_trait)] +#![allow(unused)] +#![deny(improper_ctypes)] + +pub trait TraitA { + type Assoc; +} + +impl TraitA for u32 { + type Assoc = u32; +} + +pub trait TraitB { + type Assoc; +} + +impl<T> TraitB for T +where + T: TraitA, +{ + type Assoc = <T as TraitA>::Assoc; +} + +type AliasA = impl TraitA<Assoc = u32>; + +type AliasB = impl TraitB; + +fn use_of_a() -> AliasA { + 3 +} + +fn use_of_b() -> AliasB { + 3 +} + +extern "C" { + fn lint_me() -> <AliasB as TraitB>::Assoc; + //~^ ERROR `extern` block uses type `AliasB`, which is not FFI-safe +} + +fn main() {} |