48 lines
834 B
Rust
48 lines
834 B
Rust
//@ known-bug: #117392
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pub trait BorrowComposite {
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type Ref<'a>
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where
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Self: 'a;
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}
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impl BorrowComposite for () {
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type Ref<'a> = ();
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}
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pub trait Component<Args: BorrowComposite> {
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type Output;
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}
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impl<Args: BorrowComposite> Component<Args> for () {
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type Output = ();
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}
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struct Delay<Make> {
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_make: Make,
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}
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impl<
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Args: BorrowComposite,
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Make: for<'a> FnMut(Args::Ref<'a>) -> C,
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C: Component<Args>,
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> Component<Args> for Delay<Make>
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{
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type Output = C::Output;
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}
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pub fn delay<
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Args: BorrowComposite,
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Make: for<'a> FnMut(Args::Ref<'a>) -> C,
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C: Component<Args>,
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>(
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make: Make,
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) -> impl Component<Args, Output = C::Output> {
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Delay { _make: make }
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}
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pub fn crash() -> impl Component<(), Output = ()> {
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delay(|()| delay(|()| ()))
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}
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pub fn main() {}
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