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Diffstat (limited to 'tests/ui/associated-types/associated-types-struct-field-numbered.rs')
-rw-r--r-- | tests/ui/associated-types/associated-types-struct-field-numbered.rs | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tests/ui/associated-types/associated-types-struct-field-numbered.rs b/tests/ui/associated-types/associated-types-struct-field-numbered.rs new file mode 100644 index 000000000..8612911d8 --- /dev/null +++ b/tests/ui/associated-types/associated-types-struct-field-numbered.rs @@ -0,0 +1,32 @@ +// run-pass +// Test that we correctly normalize the type of a struct field +// which has an associated type. + + +pub trait UnifyKey { + type Value; + + fn dummy(&self) { } +} + +pub struct Node<K:UnifyKey>(#[allow(unused_tuple_struct_fields)] K, K::Value); + +fn foo<K : UnifyKey<Value=Option<V>>,V : Clone>(node: &Node<K>) -> Option<V> { + node.1.clone() +} + +impl UnifyKey for i32 { + type Value = Option<u32>; +} + +impl UnifyKey for u32 { + type Value = Option<i32>; +} + +pub fn main() { + let node: Node<i32> = Node(1, Some(22)); + assert_eq!(foo(&node), Some(22)); + + let node: Node<u32> = Node(1, Some(22)); + assert_eq!(foo(&node), Some(22)); +} |