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authorFelix S. Klock II <pnkfelix@pnkfx.org>2018-08-30 13:16:59 +0200
committerFelix S. Klock II <pnkfelix@pnkfx.org>2018-09-06 13:00:26 +0200
commit7834c2284801766f9925576e8f4d05d7cb7b23dd (patch)
treeb0676510293a1ab5317291bd79f4136754dae764 /src/test/ui/run-pass/methods/method-recursive-blanket-impl.rs
parent20ca02569ae3e1dc29962e92739fbab632abf241 (diff)
downloadrust-7834c2284801766f9925576e8f4d05d7cb7b23dd.tar.gz
rust-7834c2284801766f9925576e8f4d05d7cb7b23dd.zip
Migrated slew of run-pass tests to various subdirectories of `ui/run-pass/`.
Diffstat (limited to 'src/test/ui/run-pass/methods/method-recursive-blanket-impl.rs')
-rw-r--r--src/test/ui/run-pass/methods/method-recursive-blanket-impl.rs48
1 files changed, 48 insertions, 0 deletions
diff --git a/src/test/ui/run-pass/methods/method-recursive-blanket-impl.rs b/src/test/ui/run-pass/methods/method-recursive-blanket-impl.rs
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index 00000000000..6877bf376a6
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+++ b/src/test/ui/run-pass/methods/method-recursive-blanket-impl.rs
@@ -0,0 +1,48 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Test that we don't trigger on the blanket impl for all `&'a T` but
+// rather keep autoderefing and trigger on the underlying impl.  To
+// know not to stop at the blanket, we have to recursively evaluate
+// the `T:Foo` bound.
+
+// pretty-expanded FIXME #23616
+
+use std::marker::Sized;
+
+// Note: this must be generic for the problem to show up
+trait Foo<A> {
+    fn foo(&self, a: A);
+}
+
+impl Foo<u8> for [u8] {
+    fn foo(&self, a: u8) {}
+}
+
+impl<'a, A, T> Foo<A> for &'a T where T: Foo<A> {
+    fn foo(&self, a: A) {
+        Foo::foo(*self, a)
+    }
+}
+
+trait Bar {
+    fn foo(&self);
+}
+
+struct MyType;
+
+impl Bar for MyType {
+    fn foo(&self) {}
+}
+
+fn main() {
+    let mut m = MyType;
+    (&mut m).foo()
+}