diff options
Diffstat (limited to 'src/test/run-pass/specialization/defaultimpl/projection.rs')
| -rw-r--r-- | src/test/run-pass/specialization/defaultimpl/projection.rs | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/test/run-pass/specialization/defaultimpl/projection.rs b/src/test/run-pass/specialization/defaultimpl/projection.rs new file mode 100644 index 00000000000..6a833ba6760 --- /dev/null +++ b/src/test/run-pass/specialization/defaultimpl/projection.rs @@ -0,0 +1,49 @@ +// 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. + +#![feature(specialization)] + +// Make sure we *can* project non-defaulted associated types +// cf compile-fail/specialization-default-projection.rs + +// First, do so without any use of specialization + +trait Foo { + type Assoc; +} + +impl<T> Foo for T { + type Assoc = (); +} + +fn generic_foo<T>() -> <T as Foo>::Assoc { + () +} + +// Next, allow for one layer of specialization + +trait Bar { + type Assoc; +} + +default impl<T> Bar for T { + type Assoc = (); +} + +impl<T: Clone> Bar for T { + type Assoc = u8; +} + +fn generic_bar_clone<T: Clone>() -> <T as Bar>::Assoc { + 0u8 +} + +fn main() { +} |
