mirror of https://github.com/rust-lang/rust
52 lines
953 B
Rust
52 lines
953 B
Rust
//@ run-pass
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//@ edition:2021
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#![feature(noop_waker)]
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use std::future::Future;
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trait AsyncTrait {
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#[allow(async_fn_in_trait)]
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async fn default_impl() {
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assert!(false);
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}
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#[allow(async_fn_in_trait)]
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async fn call_default_impl() {
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Self::default_impl().await
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}
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}
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struct AsyncType;
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impl AsyncTrait for AsyncType {
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async fn default_impl() {
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// :)
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}
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}
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async fn async_main() {
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// Should not assert false
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AsyncType::call_default_impl().await;
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}
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// ------------------------------------------------------------------------- //
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// Implementation Details Below...
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use std::pin::pin;
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use std::task::*;
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fn main() {
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let mut fut = pin!(async_main());
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// Poll loop, just to test the future...
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let ctx = &mut Context::from_waker(Waker::noop());
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loop {
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match fut.as_mut().poll(ctx) {
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Poll::Pending => {}
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Poll::Ready(()) => break,
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}
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}
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}
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