Merge tag 'debian/1.52.1+dfsg1-1_exp2' into proxmox/buster

[rustc.git] / src / test / ui / traits / inheritance / multiple-inheritors.rs

diff --git a/src/test/ui/traits/inheritance/multiple-inheritors.rs b/src/test/ui/traits/inheritance/multiple-inheritors.rs
new file mode 100644 (file)
index 0000000..77ecbd8
--- /dev/null
+++ b/src/test/ui/traits/inheritance/multiple-inheritors.rs
@@ -0,0 +1,23 @@
+// run-pass
+#![allow(dead_code)]
+
+trait A { fn a(&self) -> isize; }
+trait B: A { fn b(&self) -> isize; }
+trait C: A { fn c(&self) -> isize; }
+
+struct S { bogus: () }
+
+impl A for S { fn a(&self) -> isize { 10 } }
+impl B for S { fn b(&self) -> isize { 20 } }
+impl C for S { fn c(&self) -> isize { 30 } }
+
+// Both B and C inherit from A
+fn f<T:B + C>(x: &T) {
+    assert_eq!(x.a(), 10);
+    assert_eq!(x.b(), 20);
+    assert_eq!(x.c(), 30);
+}
+
+pub fn main() {
+    f(&S { bogus: () })
+}