52 lines
1.0 KiB
Rust
52 lines
1.0 KiB
Rust
// check-pass
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// [next] compile-flags: -Zlower-impl-trait-in-trait-to-assoc-ty
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// revisions: current next
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#![feature(return_position_impl_trait_in_trait)]
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//~^ WARN the feature `return_position_impl_trait_in_trait` is incomplete
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struct TestA {}
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struct TestB {}
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impl TestTrait for TestA {
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type Output = ();
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}
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impl TestTrait for TestB {
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type Output = ();
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}
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trait TestTrait {
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type Output;
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}
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impl<A, B> TestTrait for GreeterOutput<A, B>
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where
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A: TestTrait<Output = ()>,
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B: TestTrait<Output = ()>,
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{
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type Output = ();
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}
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enum GreeterOutput<A, B>
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where
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A: TestTrait<Output = ()>,
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B: TestTrait<Output = ()>,
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{
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SayHello(A),
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SayGoodbye(B),
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}
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trait Greeter {
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fn test_func(&self, func: &str) -> impl TestTrait<Output = ()> {
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match func {
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"SayHello" => GreeterOutput::SayHello(TestA {}),
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"SayGoodbye" => GreeterOutput::SayGoodbye(TestB {}),
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_ => GreeterOutput::SayHello(TestA {}),
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}
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}
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}
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fn main() {
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println!("Hello, world!");
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}
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