mirror of https://github.com/rust-lang/rust
28 lines
507 B
Rust
28 lines
507 B
Rust
//@ edition: 2021
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//@ check-pass
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//@ revisions: current next
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//@ ignore-compare-mode-next-solver (explicit revisions)
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//@[next] compile-flags: -Znext-solver
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#![feature(async_closure)]
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fn constrain<T: async FnOnce()>(t: T) -> T {
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t
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}
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fn call_once<T>(f: impl FnOnce() -> T) -> T {
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f()
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}
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async fn async_call_once<T>(f: impl async FnOnce() -> T) -> T {
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f().await
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}
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fn main() {
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let c = constrain(async || {});
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call_once(c);
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let c = constrain(async || {});
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async_call_once(c);
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}
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