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-rw-r--r--src/test/ui/variance/variance-trait-matching.rs38
1 files changed, 0 insertions, 38 deletions
diff --git a/src/test/ui/variance/variance-trait-matching.rs b/src/test/ui/variance/variance-trait-matching.rs
deleted file mode 100644
index b4efee7d6..000000000
--- a/src/test/ui/variance/variance-trait-matching.rs
+++ /dev/null
@@ -1,38 +0,0 @@
-#![allow(dead_code)]
-
-// Get<T> is covariant in T
-trait Get<T> {
- fn get(&self) -> T;
-}
-
-struct Cloner<T:Clone> {
- t: T
-}
-
-impl<T:Clone> Get<T> for Cloner<T> {
- fn get(&self) -> T {
- self.t.clone()
- }
-}
-
-fn get<'a, G>(get: &G) -> i32
- where G : Get<&'a i32>
-{
- // This fails to type-check because, without variance, we can't
- // use `G : Get<&'a i32>` as evidence that `G : Get<&'b i32>`,
- // even if `'a : 'b`.
- pick(get, &22) //~ ERROR explicit lifetime required in the type of `get` [E0621]
-}
-
-fn pick<'b, G>(get: &'b G, if_odd: &'b i32) -> i32
- where G : Get<&'b i32>
-{
- let v = *get.get();
- if v % 2 != 0 { v } else { *if_odd }
-}
-
-fn main() {
- let x = Cloner { t: &23 };
- let y = get(&x);
- assert_eq!(y, 23);
-}