mirror of https://github.com/rust-lang/rust
43 lines
681 B
Rust
43 lines
681 B
Rust
//@ run-pass
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#![allow(dead_code)]
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#![feature(specialization)] //~ WARN the feature `specialization` is incomplete
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// Make sure we *can* project non-defaulted associated types
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// cf ui/specialization/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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