Auto merge of #26831 - arielb1:lifetime-fixes, r=nikomatsakis

r? @nikomatsakis

src/test/compile-fail/regions-static-bound.rs

@@ -0,0 +1,24 @@
+// Copyright 2015 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.
+
+fn static_id<'a,'b>(t: &'a ()) -> &'static ()
+    where 'a: 'static { t }
+fn static_id_indirect<'a,'b>(t: &'a ()) -> &'static ()
+    where 'a: 'b, 'b: 'static { t }
+fn static_id_wrong_way<'a>(t: &'a ()) -> &'static () where 'static: 'a {
+    t //~ ERROR cannot infer an appropriate lifetime
+}
+
+fn error(u: &(), v: &()) {
+    static_id(&u); //~ ERROR cannot infer an appropriate lifetime
+    static_id_indirect(&v); //~ ERROR cannot infer an appropriate lifetime
+}
+
+fn main() {}

src/test/run-pass/issue-26802.rs

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+// Copyright 2015 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.
+
+trait Foo<'a> {
+    fn bar<'b>(&self, x: &'b u8) -> u8 where 'a: 'b { *x+7 }
+}
+
+pub struct FooBar;
+impl Foo<'static> for FooBar {}
+fn test(foobar: FooBar) -> Box<Foo<'static>> {
+    Box::new(foobar)
+}
+
+fn main() {
+    assert_eq!(test(FooBar).bar(&4), 11);
+}

src/test/run-pass/regions-static-bound.rs

@@ -0,0 +1,28 @@
+// Copyright 2015 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.
+
+fn invariant_id<'a,'b>(t: &'b mut &'static ()) -> &'b mut &'a ()
+    where 'a: 'static { t }
+fn static_id<'a>(t: &'a ()) -> &'static ()
+    where 'a: 'static { t }
+fn static_id_indirect<'a,'b>(t: &'a ()) -> &'static ()
+    where 'a: 'b, 'b: 'static { t }
+fn ref_id<'a>(t: &'a ()) -> &'a () where 'static: 'a { t }
+
+static UNIT: () = ();
+
+fn main()
+{
+    let mut val : &'static () = &UNIT;
+    invariant_id(&mut val);
+    static_id(val);
+    static_id_indirect(val);
+    ref_id(val);
+}