mirror of https://github.com/rust-lang/rust
50 lines
953 B
Rust
50 lines
953 B
Rust
// Regression test for issue #83190, triggering an ICE in borrowck.
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//@ check-pass
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pub trait Any {}
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impl<T> Any for T {}
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pub trait StreamOnce {
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type Range;
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}
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pub trait Parser<Input>: Sized {
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type Output;
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type PartialState;
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fn map(self) -> Map<Self> {
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todo!()
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}
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}
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pub struct Map<P>(P);
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impl<I, P: Parser<I, Output = ()>> Parser<I> for Map<P> {
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type Output = ();
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type PartialState = P::PartialState;
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}
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struct TakeWhile1<Input>(Input);
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impl<I: StreamOnce> Parser<I> for TakeWhile1<I> {
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type Output = I::Range;
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type PartialState = ();
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}
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impl<I> TakeWhile1<I> {
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fn new() -> Self {
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todo!()
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}
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}
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impl<I, A: Parser<I>> Parser<I> for (A,) {
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type Output = ();
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type PartialState = Map<A::Output>;
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}
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pub fn metric_stream_parser<'a, I>() -> impl Parser<I, Output = (), PartialState = impl Any + 'a>
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where
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I: StreamOnce<Range = &'a [()]>,
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{
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(TakeWhile1::new(),).map()
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}
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fn main() {}
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