comments

1 files changed, 86 insertions, 0 deletions

diff --git a/tests/ui/coercion/trait-object-arrays-11205.rs b/tests/ui/coercion/trait-object-arrays-11205.rs
new file mode 100644
index 00000000000..45d69dce323
--- /dev/null
+++ b/tests/ui/coercion/trait-object-arrays-11205.rs
@@ -0,0 +1,86 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/11205
+
+//@ run-pass
+
+#![allow(dead_code)]
+
+trait Foo { fn dummy(&self) { } }
+impl Foo for isize {}
+fn foo(_: [&dyn Foo; 2]) {}
+fn foos(_: &[&dyn Foo]) {}
+fn foog<T>(_: &[T], _: &[T]) {}
+
+fn bar(_: [Box<dyn Foo>; 2]) {}
+fn bars(_: &[Box<dyn Foo+'static>]) {}
+
+fn main() {
+    let x: [&dyn Foo; 2] = [&1, &2];
+    foo(x);
+    foo([&1, &2]);
+
+    let r = &1;
+    let x: [&dyn Foo; 2] = [r; 2];
+    foo(x);
+    foo([&1; 2]);
+
+    let x: &[&dyn Foo] = &[&1, &2];
+    foos(x);
+    foos(&[&1, &2]);
+
+    let x: &[&dyn Foo] = &[&1, &2];
+    let r = &1;
+    foog(x, &[r]);
+
+    let x: [Box<dyn Foo>; 2] = [Box::new(1), Box::new(2)];
+    bar(x);
+    bar([Box::new(1), Box::new(2)]);
+
+    let x: &[Box<dyn Foo+'static>] = &[Box::new(1), Box::new(2)];
+    bars(x);
+    bars(&[Box::new(1), Box::new(2)]);
+
+    let x: &[Box<dyn Foo+'static>] = &[Box::new(1), Box::new(2)];
+    foog(x, &[Box::new(1)]);
+
+    struct T<'a> {
+        t: [&'a (dyn Foo+'a); 2]
+    }
+    let _n = T {
+        t: [&1, &2]
+    };
+    let r = &1;
+    let _n = T {
+        t: [r; 2]
+    };
+    let x: [&dyn Foo; 2] = [&1, &2];
+    let _n = T {
+        t: x
+    };
+
+    struct F<'b> {
+        t: &'b [&'b (dyn Foo+'b)]
+    }
+    let _n = F {
+        t: &[&1, &2]
+    };
+    let r = &1;
+    let r: [&dyn Foo; 2] = [r; 2];
+    let _n = F {
+        t: &r
+    };
+    let x: [&dyn Foo; 2] = [&1, &2];
+    let _n = F {
+        t: &x
+    };
+
+    struct M<'a> {
+        t: &'a [Box<dyn Foo+'static>]
+    }
+    let _n = M {
+        t: &[Box::new(1), Box::new(2)]
+    };
+    let x: [Box<dyn Foo>; 2] = [Box::new(1), Box::new(2)];
+    let _n = M {
+        t: &x
+    };
+}