50 lines
1.0 KiB
Rust
50 lines
1.0 KiB
Rust
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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![feature(specialization)]
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// Make sure we *can* project non-defaulted associated types
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// cf compile-fail/specialization-default-projection.rs
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// First, do so without any use of specialization
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trait Foo {
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type Assoc;
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}
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impl<T> Foo for T {
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type Assoc = ();
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}
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fn generic_foo<T>() -> <T as Foo>::Assoc {
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()
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}
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// Next, allow for one layer of specialization
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trait Bar {
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type Assoc;
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}
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default impl<T> Bar for T {
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type Assoc = ();
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}
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impl<T: Clone> Bar for T {
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type Assoc = u8;
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}
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fn generic_bar_clone<T: Clone>() -> <T as Bar>::Assoc {
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0u8
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}
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fn main() {
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}
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