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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/alias/only-maybe-bound.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 'src/test/ui/traits/alias/only-maybe-bound.rs')
-rw-r--r-- | src/test/ui/traits/alias/only-maybe-bound.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/traits/alias/only-maybe-bound.rs b/src/test/ui/traits/alias/only-maybe-bound.rs new file mode 100644 index 000000000..e4abf314e --- /dev/null +++ b/src/test/ui/traits/alias/only-maybe-bound.rs @@ -0,0 +1,22 @@ +// Test that `dyn ?Sized` (i.e., a trait object with only a maybe buond) is not allowed, when just +// `?Sized` results from trait alias expansion. + +#![feature(trait_alias)] + +trait S = ?Sized; + +// Nest a couple of levels deep: +trait _0 = S; +trait _1 = _0; + +// Straight list expansion: +type _T0 = dyn _1; +//~^ ERROR at least one trait is required for an object type [E0224] + +// Twice: +trait _2 = _1 + _1; + +type _T1 = dyn _2; +//~^ ERROR at least one trait is required for an object type [E0224] + +fn main() {} |