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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/associated-types/associated-types-enum-field-numbered.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/associated-types/associated-types-enum-field-numbered.rs')
-rw-r--r-- | src/test/ui/associated-types/associated-types-enum-field-numbered.rs | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/test/ui/associated-types/associated-types-enum-field-numbered.rs b/src/test/ui/associated-types/associated-types-enum-field-numbered.rs new file mode 100644 index 000000000..77ced3c07 --- /dev/null +++ b/src/test/ui/associated-types/associated-types-enum-field-numbered.rs @@ -0,0 +1,35 @@ +// run-pass +// Test associated types appearing in tuple-like enum variants. + + +use self::VarValue::*; + +pub trait UnifyKey { + type Value; + fn to_index(&self) -> usize; +} + +pub enum VarValue<K:UnifyKey> { + Redirect(K), + Root(K::Value, usize), +} + +fn get<'a,K:UnifyKey<Value=Option<V>>,V>(table: &'a Vec<VarValue<K>>, key: &K) -> &'a Option<V> { + match table[key.to_index()] { + VarValue::Redirect(ref k) => get(table, k), + VarValue::Root(ref v, _) => v, + } +} + +impl UnifyKey for usize { + type Value = Option<char>; + fn to_index(&self) -> usize { *self } +} + +fn main() { + let table = vec![/* 0 */ Redirect(1), + /* 1 */ Redirect(3), + /* 2 */ Root(Some('x'), 0), + /* 3 */ Redirect(2)]; + assert_eq!(get(&table, &0), &Some('x')); +} |