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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/object/exclusion.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/object/exclusion.rs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/test/ui/traits/object/exclusion.rs b/src/test/ui/traits/object/exclusion.rs new file mode 100644 index 000000000..766dceeaf --- /dev/null +++ b/src/test/ui/traits/object/exclusion.rs @@ -0,0 +1,19 @@ +// run-pass +trait Future: 'static { + // The requirement for Self: Sized must prevent instantiation of + // Future::forget in vtables, otherwise there's an infinite type + // recursion through <Map<...> as Future>::forget. + fn forget(self) where Self: Sized { + Box::new(Map(self)) as Box<dyn Future>; + } +} + +struct Map<A>(#[allow(unused_tuple_struct_fields)] A); +impl<A: Future> Future for Map<A> {} + +pub struct Promise; +impl Future for Promise {} + +fn main() { + Promise.forget(); +} |