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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/nll/user-annotations/issue-55241.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/nll/user-annotations/issue-55241.rs')
-rw-r--r-- | src/test/ui/nll/user-annotations/issue-55241.rs | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/test/ui/nll/user-annotations/issue-55241.rs b/src/test/ui/nll/user-annotations/issue-55241.rs new file mode 100644 index 000000000..29969c7b4 --- /dev/null +++ b/src/test/ui/nll/user-annotations/issue-55241.rs @@ -0,0 +1,26 @@ +// Regression test for #55241: +// +// The reference to `C::HASHED_NULL_NODE` resulted in a type like `<C +// as NodeCodec<_>>::Out`; normalizing this type requires knowing the +// value of `_`; solving that requires having normalized, so we can +// test against `C: NodeCodec<H>` in the environment. +// +// run-pass + +pub trait Hasher { + type Out: Eq; +} + +pub trait NodeCodec<H: Hasher> { + const HASHED_NULL_NODE: H::Out; +} + +pub trait Trie<H: Hasher, C: NodeCodec<H>> { + /// Returns the root of the trie. + fn root(&self) -> &H::Out; + + /// Is the trie empty? + fn is_empty(&self) -> bool { *self.root() == C::HASHED_NULL_NODE } +} + +fn main() { } |