Add compile-fail tests for non-representable structs and enums

Author: isabelmu

src/test/compile-fail/issue-3008-1.rs

@@ -0,0 +1,15 @@
+// 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.
+
+enum foo { foo(bar) }
+enum bar { bar_none, bar_some(bar) } //~ ERROR illegal recursive enum type; wrap the inner value in a box to make it representable
+
+fn main() {
+}

src/test/compile-fail/issue-3008-2.rs

@@ -0,0 +1,17 @@
+// 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.
+
+enum foo { foo(bar) }
+struct bar { x: bar } //~ ERROR illegal recursive struct type; wrap the inner value in a box to make it representable
+//~^ ERROR this type cannot be instantiated without an instance of itself
+
+fn main() {
+}
+

src/test/compile-fail/issue-3008-3.rs

@@ -0,0 +1,15 @@
+// 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.
+
+enum E1 { V1(E2<E1>), }
+enum E2<T> { V2(E2<E1>), } //~ ERROR illegal recursive enum type; wrap the inner value in a box to make it representable
+
+fn main() {
+}

src/test/compile-fail/issue-3779.rs

@@ -0,0 +1,17 @@
+// 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.
+
+struct S { //~ ERROR illegal recursive struct type; wrap the inner value in a box to make it representable
+    element: Option<S>
+}
+
+fn main() {
+    let x = S { element: None };
+}