syntax: Support parentheses around trait bounds

3 files changed, 59 insertions, 0 deletions

diff --git a/src/test/parse-fail/trait-object-bad-parens.rs b/src/test/parse-fail/trait-object-bad-parens.rs
new file mode 100644
index 00000000000..a44c0c3f32f
--- /dev/null
+++ b/src/test/parse-fail/trait-object-bad-parens.rs
@@ -0,0 +1,20 @@
+// Copyright 2017 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.
+
+// compile-flags: -Z parse-only -Z continue-parse-after-error
+
+fn main() {
+    let _: Box<((Copy)) + Copy>;
+    //~^ ERROR expected a path on the left-hand side of `+`, not `((Copy))`
+    let _: Box<(Copy + Copy) + Copy>;
+    //~^ ERROR expected a path on the left-hand side of `+`, not `( Copy + Copy)`
+    let _: Box<(Copy +) + Copy>;
+    //~^ ERROR expected a path on the left-hand side of `+`, not `( Copy)`
+}
diff --git a/src/test/parse-fail/trait-object-lifetime-parens.rs b/src/test/parse-fail/trait-object-lifetime-parens.rs
new file mode 100644
index 00000000000..6be62d966eb
--- /dev/null
+++ b/src/test/parse-fail/trait-object-lifetime-parens.rs
@@ -0,0 +1,18 @@
+// Copyright 2017 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.
+
+// compile-flags: -Z parse-only -Z continue-parse-after-error
+
+fn f<T: Copy + ('a)>() {} //~ ERROR parenthesized lifetime bounds are not supported
+
+fn main() {
+    let _: Box<Copy + ('a)>; //~ ERROR parenthesized lifetime bounds are not supported
+    let _: Box<('a) + Copy>; //~ ERROR expected type, found `'a`
+}
diff --git a/src/test/parse-fail/trait-object-trait-parens.rs b/src/test/parse-fail/trait-object-trait-parens.rs
new file mode 100644
index 00000000000..dc44f4f3fb1
--- /dev/null
+++ b/src/test/parse-fail/trait-object-trait-parens.rs
@@ -0,0 +1,21 @@
+// Copyright 2017 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.
+
+// compile-flags: -Z parse-only
+
+fn f<T: (Copy) + (?Sized) + (for<'a> Trait<'a>)>() {}
+
+fn main() {
+    let _: Box<(Copy) + (?Sized) + (for<'a> Trait<'a>)>;
+    let _: Box<(?Sized) + (for<'a> Trait<'a>) + (Copy)>;
+    let _: Box<(for<'a> Trait<'a>) + (Copy) + (?Sized)>;
+}
+
+FAIL //~ ERROR