rollup merge of #18506 : nikomatsakis/assoc-type-bounds

src/test/compile-fail/associated-types-unsized.rs

@@ -0,0 +1,24 @@
+// 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.
+
+#![feature(associated_types)]
+
+trait Get {
+    type Sized? Value;
+    fn get(&self) -> <Self as Get>::Value;
+}
+
+fn foo<T:Get>(t: T) {
+    let x = t.get(); //~ ERROR the trait `core::kinds::Sized` is not implemented
+}
+
+fn main() {
+}
+

src/test/compile-fail/variance-regions-direct.rs

@@ -14,7 +14,7 @@
 // Regions that just appear in normal spots are contravariant:
 
 #[rustc_variance]
-struct Test2<'a, 'b, 'c> { //~ ERROR regions=[[-, -, -];[];[]]
+struct Test2<'a, 'b, 'c> { //~ ERROR regions=[[-, -, -];[];[];[]]
     x: &'a int,
     y: &'b [int],
     c: &'c str
@@ -23,7 +23,7 @@ struct Test2<'a, 'b, 'c> { //~ ERROR regions=[[-, -, -];[];[]]
 // Those same annotations in function arguments become covariant:
 
 #[rustc_variance]
-struct Test3<'a, 'b, 'c> { //~ ERROR regions=[[+, +, +];[];[]]
+struct Test3<'a, 'b, 'c> { //~ ERROR regions=[[+, +, +];[];[];[]]
     x: extern "Rust" fn(&'a int),
     y: extern "Rust" fn(&'b [int]),
     c: extern "Rust" fn(&'c str),
@@ -32,7 +32,7 @@ struct Test3<'a, 'b, 'c> { //~ ERROR regions=[[+, +, +];[];[]]
 // Mutability induces invariance:
 
 #[rustc_variance]
-struct Test4<'a, 'b:'a> { //~ ERROR regions=[[-, o];[];[]]
+struct Test4<'a, 'b:'a> { //~ ERROR regions=[[-, o];[];[];[]]
     x: &'a mut &'b int,
 }
 
@@ -40,7 +40,7 @@ struct Test4<'a, 'b:'a> { //~ ERROR regions=[[-, o];[];[]]
 // contravariant context:
 
 #[rustc_variance]
-struct Test5<'a, 'b> { //~ ERROR regions=[[+, o];[];[]]
+struct Test5<'a, 'b> { //~ ERROR regions=[[+, o];[];[];[]]
     x: extern "Rust" fn(&'a mut &'b int),
 }
 
@@ -50,21 +50,21 @@ struct Test5<'a, 'b> { //~ ERROR regions=[[+, o];[];[]]
 // argument list occurs in an invariant context.
 
 #[rustc_variance]
-struct Test6<'a, 'b> { //~ ERROR regions=[[-, o];[];[]]
+struct Test6<'a, 'b> { //~ ERROR regions=[[-, o];[];[];[]]
     x: &'a mut extern "Rust" fn(&'b int),
 }
 
 // No uses at all is bivariant:
 
 #[rustc_variance]
-struct Test7<'a> { //~ ERROR regions=[[*];[];[]]
+struct Test7<'a> { //~ ERROR regions=[[*];[];[];[]]
     x: int
 }
 
 // Try enums too.
 
 #[rustc_variance]
-enum Test8<'a, 'b, 'c:'b> { //~ ERROR regions=[[+, -, o];[];[]]
+enum Test8<'a, 'b, 'c:'b> { //~ ERROR regions=[[+, -, o];[];[];[]]
     Test8A(extern "Rust" fn(&'a int)),
     Test8B(&'b [int]),
     Test8C(&'b mut &'c str),

src/test/compile-fail/variance-regions-indirect.rs

@@ -13,29 +13,29 @@
 // Try enums too.
 
 #[rustc_variance]
-enum Base<'a, 'b, 'c:'b, 'd> { //~ ERROR regions=[[+, -, o, *];[];[]]
+enum Base<'a, 'b, 'c:'b, 'd> { //~ ERROR regions=[[+, -, o, *];[];[];[]]
     Test8A(extern "Rust" fn(&'a int)),
     Test8B(&'b [int]),
     Test8C(&'b mut &'c str),
 }
 
 #[rustc_variance]
-struct Derived1<'w, 'x:'y, 'y, 'z> { //~ ERROR regions=[[*, o, -, +];[];[]]
+struct Derived1<'w, 'x:'y, 'y, 'z> { //~ ERROR regions=[[*, o, -, +];[];[];[]]
     f: Base<'z, 'y, 'x, 'w>
 }
 
 #[rustc_variance] // Combine - and + to yield o
-struct Derived2<'a, 'b:'a, 'c> { //~ ERROR regions=[[o, o, *];[];[]]
+struct Derived2<'a, 'b:'a, 'c> { //~ ERROR regions=[[o, o, *];[];[];[]]
     f: Base<'a, 'a, 'b, 'c>
 }
 
 #[rustc_variance] // Combine + and o to yield o (just pay attention to 'a here)
-struct Derived3<'a:'b, 'b, 'c> { //~ ERROR regions=[[o, -, *];[];[]]
+struct Derived3<'a:'b, 'b, 'c> { //~ ERROR regions=[[o, -, *];[];[];[]]
     f: Base<'a, 'b, 'a, 'c>
 }
 
 #[rustc_variance] // Combine + and * to yield + (just pay attention to 'a here)
-struct Derived4<'a, 'b, 'c:'b> { //~ ERROR regions=[[+, -, o];[];[]]
+struct Derived4<'a, 'b, 'c:'b> { //~ ERROR regions=[[+, -, o];[];[];[]]
     f: Base<'a, 'b, 'c, 'a>
 }
 

src/test/compile-fail/variance-trait-object-bound.rs

@@ -19,7 +19,7 @@ use std::mem;
 trait T { fn foo(); }
 
 #[rustc_variance]
-struct TOption<'a> { //~ ERROR regions=[[-];[];[]]
+struct TOption<'a> { //~ ERROR regions=[[-];[];[];[]]
     v: Option<Box<T + 'a>>,
 }