New tests --- check that wf relation is being checked in various positions

Author: nikomatsakis

src/test/compile-fail/regions-wf-trait-object.rs

@@ -0,0 +1,21 @@
+// 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.t
+
+// Check that the explicit lifetime bound (`'b`, in this example) must
+// outlive all the superbound from the trait (`'a`, in this example).
+
+trait TheTrait<'t>: 't { }
+
+struct Foo<'a,'b> {
+        //~^ ERROR lifetime bound not satisfied
+    x: Box<TheTrait<'a>+'b>
+}
+
+fn main() { }

src/test/compile-fail/wf-array-elem-sized.rs

@@ -0,0 +1,21 @@
+// 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.
+
+// Check that array elemen types must be Sized. Issue #25692.
+
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+
+struct Foo { //~ WARN E0277
+    foo: [[u8]],
+}
+
+#[rustc_error]
+fn main() { } //~ ERROR compilation successful

src/test/compile-fail/wf-const-type.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.
+
+// Test that we check the types of constants are well-formed.
+
+#![feature(associated_type_defaults)]
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+
+struct IsCopy<T:Copy> { t: T }
+struct NotCopy;
+
+const FOO: IsCopy<Option<NotCopy>> = IsCopy { t: None };
+//~^ ERROR E0277
+
+#[rustc_error]
+fn main() { }

src/test/compile-fail/wf-enum-bound.rs

@@ -0,0 +1,26 @@
+// 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 check enum bounds for WFedness.
+
+#![feature(associated_type_defaults)]
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+
+trait ExtraCopy<T:Copy> { }
+
+enum SomeEnum<T,U> //~ WARN E0277
+    where T: ExtraCopy<U>
+{
+    SomeVariant(T,U)
+}
+
+#[rustc_error]
+fn main() { } //~ ERROR compilation successful

src/test/compile-fail/wf-enum-fields.rs

@@ -0,0 +1,32 @@
+// 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 check struct fields for WFedness.
+
+#![feature(associated_type_defaults)]
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+
+struct IsCopy<T:Copy> {
+    value: T
+}
+
+enum SomeEnum<A> {
+    SomeVariant(IsCopy<A>) //~ ERROR E0277
+}
+
+enum AnotherEnum<A> { //~ ERROR E0277
+    AnotherVariant {
+        f: IsCopy<A>
+    }
+}
+
+#[rustc_error]
+fn main() { }

src/test/compile-fail/wf-fn-where-clause.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.
+
+// Test that we check where-clauses on fn items.
+
+#![feature(associated_type_defaults)]
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+
+trait ExtraCopy<T:Copy> { }
+
+fn foo<T,U>() where T: ExtraCopy<U> //~ WARN E0277
+{
+}
+
+#[rustc_error]
+fn main() { } //~ ERROR compilation successful

src/test/compile-fail/wf-impl-associated-type-region.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.
+
+// Check that we require that associated types in an impl are well-formed.
+
+#![feature(rustc_attrs)]
+
+pub trait Foo<'a> {
+    type Bar;
+}
+
+impl<'a, T> Foo<'a> for T {
+    type Bar = &'a T; //~ WARN E0309
+}
+
+#[rustc_error]
+fn main() { } //~ ERROR compilation

src/test/compile-fail/wf-impl-associated-type-trait.rs

@@ -0,0 +1,33 @@
+// 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.
+
+// Check that we require that associated types in an impl are well-formed.
+
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+
+pub trait MyHash { }
+
+pub struct MySet<T:MyHash> {
+    data: Vec<T>
+}
+
+pub trait Foo {
+    type Bar;
+}
+
+impl<T> Foo for T {
+    type Bar = MySet<T>;
+    //~^ WARN the trait `MyHash` is not implemented for the type `T`
+}
+
+#[rustc_error]
+fn main() { } //~ ERROR compilation successful
+

src/test/compile-fail/wf-in-fn-arg.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.
+
+// Check that we enforce WF conditions also for argument types in fn items.
+
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+
+struct MustBeCopy<T:Copy> {
+    t: T
+}
+
+fn bar<T>(_: &MustBeCopy<T>) //~ ERROR E0277
+{
+}
+
+fn main() { }

src/test/compile-fail/wf-in-fn-ret.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.
+
+// Check that we enforce WF conditions also for return types in fn items.
+
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+
+struct MustBeCopy<T:Copy> {
+    t: T
+}
+
+fn bar<T>() -> MustBeCopy<T> //~ ERROR E0277
+{
+}
+
+fn main() { }

src/test/compile-fail/wf-in-fn-type-arg.rs

@@ -0,0 +1,22 @@
+// 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.
+
+// Check that we enforce WF conditions also for types in fns.
+
+struct MustBeCopy<T:Copy> {
+    t: T
+}
+
+struct Bar<T> {
+    // needs T: Copy
+    x: fn(MustBeCopy<T>) //~ ERROR E0277
+}
+
+fn main() { }

src/test/compile-fail/wf-in-fn-type-ret.rs

@@ -0,0 +1,22 @@
+// 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.
+
+// Check that we enforce WF conditions also for types in fns.
+
+struct MustBeCopy<T:Copy> {
+    t: T
+}
+
+struct Foo<T> {
+    // needs T: 'static
+    x: fn() -> MustBeCopy<T> //~ ERROR E0277
+}
+
+fn main() { }

src/test/compile-fail/wf-in-fn-type-static.rs

@@ -0,0 +1,32 @@
+// 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.
+
+// Check that we enforce WF conditions related to regions also for
+// types in fns.
+
+#![allow(dead_code)]
+#![feature(rustc_attrs)]
+
+struct MustBeCopy<T:Copy> {
+    t: T
+}
+
+struct Foo<T> { //~ WARN E0310
+    // needs T: 'static
+    x: fn() -> &'static T //~ WARN E0310
+}
+
+struct Bar<T> { //~ WARN E0310
+    // needs T: Copy
+    x: fn(&'static T) //~ WARN E0310
+}
+
+#[rustc_error]
+fn main() { } //~ ERROR compilation successful

src/test/compile-fail/wf-in-fn-where-clause.rs

@@ -0,0 +1,25 @@
+// 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.
+
+// Check that we enforce WF conditions also for where clauses in fn items.
+
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+
+trait MustBeCopy<T:Copy> {
+}
+
+fn bar<T,U>() //~ WARN E0277
+    where T: MustBeCopy<U>
+{
+}
+
+#[rustc_error]
+fn main() { } //~ ERROR compilation successful

src/test/compile-fail/wf-in-obj-type-static.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.
+
+// Check that we enforce WF conditions also for types in fns.
+
+#![feature(rustc_attrs)]
+#![allow(dead_code)]
+
+trait Object<T> { }
+
+struct MustBeCopy<T:Copy> {
+    t: T
+}
+
+struct Foo<T> { //~ WARN E0310
+    // needs T: 'static
+    x: Object<&'static T> //~ WARN E0310
+}
+
+#[rustc_error]
+fn main() { } //~ ERROR compilation successful