diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
commit | 64d98f8ee037282c35007b64c2649055c56af1db (patch) | |
tree | 5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /tests/ui/associated-types/associated-types-enum-field-named.rs | |
parent | Adding debian version 1.67.1+dfsg1-1. (diff) | |
download | rustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz rustc-64d98f8ee037282c35007b64c2649055c56af1db.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/associated-types/associated-types-enum-field-named.rs')
-rw-r--r-- | tests/ui/associated-types/associated-types-enum-field-named.rs | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/tests/ui/associated-types/associated-types-enum-field-named.rs b/tests/ui/associated-types/associated-types-enum-field-named.rs new file mode 100644 index 000000000..896d67213 --- /dev/null +++ b/tests/ui/associated-types/associated-types-enum-field-named.rs @@ -0,0 +1,35 @@ +// run-pass +// Test associated types appearing in struct-like enum variants. + + +use self::VarValue::*; + +pub trait UnifyKey { + type Value; + fn to_index(&self) -> usize; +} + +pub enum VarValue<K:UnifyKey> { + Redirect { to: K }, + Root { value: K::Value, rank: 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 { to: ref k } => get(table, k), + VarValue::Root { value: ref v, rank: _ } => v, + } +} + +impl UnifyKey for usize { + type Value = Option<char>; + fn to_index(&self) -> usize { *self } +} + +fn main() { + let table = vec![/* 0 */ Redirect { to: 1 }, + /* 1 */ Redirect { to: 3 }, + /* 2 */ Root { value: Some('x'), rank: 0 }, + /* 3 */ Redirect { to: 2 }]; + assert_eq!(get(&table, &0), &Some('x')); +} |