mirror of https://github.com/rust-lang/rust
33 lines
639 B
Rust
33 lines
639 B
Rust
//@ run-pass
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// Test that we correctly normalize the type of a struct field
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// which has an associated type.
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pub trait UnifyKey {
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type Value;
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fn dummy(&self) { }
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}
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pub struct Node<K:UnifyKey>(#[allow(dead_code)] K, K::Value);
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fn foo<K : UnifyKey<Value=Option<V>>,V : Clone>(node: &Node<K>) -> Option<V> {
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node.1.clone()
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}
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impl UnifyKey for i32 {
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type Value = Option<u32>;
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}
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impl UnifyKey for u32 {
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type Value = Option<i32>;
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}
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pub fn main() {
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let node: Node<i32> = Node(1, Some(22));
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assert_eq!(foo(&node), Some(22));
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let node: Node<u32> = Node(1, Some(22));
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assert_eq!(foo(&node), Some(22));
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}
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