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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/type-alias-impl-trait/fallback.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/type-alias-impl-trait/fallback.rs')
-rw-r--r-- | src/test/ui/type-alias-impl-trait/fallback.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/fallback.rs b/src/test/ui/type-alias-impl-trait/fallback.rs new file mode 100644 index 000000000..d8cf7d71f --- /dev/null +++ b/src/test/ui/type-alias-impl-trait/fallback.rs @@ -0,0 +1,28 @@ +// Tests that we correctly handle opaque types being used opaquely, +// even within their defining scope. +// +#![feature(type_alias_impl_trait)] + +type Foo = impl Copy; + +enum Wrapper<T> { + First(T), + Second +} + +// This method constrains `Foo` to be `bool` +fn constrained_foo() -> Foo { + true +} + + +// This method does not constrain `Foo`. +// Per RFC 2071, function bodies may either +// fully constrain an opaque type, or place no +// constraints on it. +fn unconstrained_foo() -> Wrapper<Foo> { + Wrapper::Second + //~^ ERROR: type annotations needed +} + +fn main() {} |