mirror of
https://github.com/rust-lang/rust
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39 lines
613 B
Rust
39 lines
613 B
Rust
//@ revisions: current next
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//@[next] compile-flags: -Znext-solver
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//@[current] run-pass
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#![feature(precise_capturing)]
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trait Get {
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fn get(&mut self) -> u32;
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}
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impl Get for () {
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fn get(&mut self) -> u32 {
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0
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}
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}
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impl<T> Get for &mut T
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where
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T: Get,
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{
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fn get(&mut self) -> u32 {
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T::get(self) + 1
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}
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}
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fn foo(n: usize, m: &mut ()) -> impl Get + use<'_> {
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if n > 0 {
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let mut iter = foo(n - 1, m);
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//[next]~^ type annotations needed
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assert_eq!(iter.get(), 1);
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}
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m
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}
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fn main() {
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let g = foo(1, &mut ()).get();
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assert_eq!(g, 1);
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}
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