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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:20:29 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:20:29 +0000 |
commit | 631cd5845e8de329d0e227aaa707d7ea228b8f8f (patch) | |
tree | a1b87c8f8cad01cf18f7c5f57a08f102771ed303 /tests/ui/traits/new-solver/alias-eq-in-canonical-response.rs | |
parent | Adding debian version 1.69.0+dfsg1-1. (diff) | |
download | rustc-631cd5845e8de329d0e227aaa707d7ea228b8f8f.tar.xz rustc-631cd5845e8de329d0e227aaa707d7ea228b8f8f.zip |
Merging upstream version 1.70.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/traits/new-solver/alias-eq-in-canonical-response.rs')
-rw-r--r-- | tests/ui/traits/new-solver/alias-eq-in-canonical-response.rs | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/tests/ui/traits/new-solver/alias-eq-in-canonical-response.rs b/tests/ui/traits/new-solver/alias-eq-in-canonical-response.rs new file mode 100644 index 000000000..4bfb6323a --- /dev/null +++ b/tests/ui/traits/new-solver/alias-eq-in-canonical-response.rs @@ -0,0 +1,40 @@ +// check-pass +// compile-flags: -Ztrait-solver=next + +trait Foo { + type Gat<'a> + where + Self: 'a; + fn bar(&self) -> Self::Gat<'_>; +} + +enum Option<T> { + Some(T), + None, +} + +impl<T> Option<T> { + fn as_ref(&self) -> Option<&T> { + match self { + Option::Some(t) => Option::Some(t), + Option::None => Option::None, + } + } + + fn map<U>(self, f: impl FnOnce(T) -> U) -> Option<U> { + match self { + Option::Some(t) => Option::Some(f(t)), + Option::None => Option::None, + } + } +} + +impl<T: Foo + 'static> Foo for Option<T> { + type Gat<'a> = Option<<T as Foo>::Gat<'a>> where Self: 'a; + + fn bar(&self) -> Self::Gat<'_> { + self.as_ref().map(Foo::bar) + } +} + +fn main() {} |