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Rollup merge of #88565 - lqd:issue-83190, r=spastorino
Add regression test for issue 83190 Reduced from `bioyino-metric` by ````@hellow554```` and myself. Closes #83190. r? ````@spastorino````
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// check-pass | ||
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// Regression test for issue #83190, triggering an ICE in borrowck. | ||
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pub trait Any {} | ||
impl<T> Any for T {} | ||
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pub trait StreamOnce { | ||
type Range; | ||
} | ||
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pub trait Parser<Input>: Sized { | ||
type Output; | ||
type PartialState; | ||
fn map(self) -> Map<Self> { | ||
todo!() | ||
} | ||
} | ||
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pub struct Map<P>(P); | ||
impl<I, P: Parser<I, Output = ()>> Parser<I> for Map<P> { | ||
type Output = (); | ||
type PartialState = P::PartialState; | ||
} | ||
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struct TakeWhile1<Input>(Input); | ||
impl<I: StreamOnce> Parser<I> for TakeWhile1<I> { | ||
type Output = I::Range; | ||
type PartialState = (); | ||
} | ||
impl<I> TakeWhile1<I> { | ||
fn new() -> Self { | ||
todo!() | ||
} | ||
} | ||
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impl<I, A: Parser<I>> Parser<I> for (A,) { | ||
type Output = (); | ||
type PartialState = Map<A::Output>; | ||
} | ||
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pub fn metric_stream_parser<'a, I>() -> impl Parser<I, Output = (), PartialState = impl Any + 'a> | ||
where | ||
I: StreamOnce<Range = &'a [()]>, | ||
{ | ||
(TakeWhile1::new(),).map() | ||
} | ||
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fn main() {} |