31 lines
708 B
Rust
31 lines
708 B
Rust
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//@ edition: 2024
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//@ revisions: with_impl without_impl
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//@[with_impl] run-pass
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//! Sanity check that experimental new pattern typing rules work as expected with trait selection
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fn main() {
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fn generic<R: Ref>() -> (R, bool) {
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R::meow()
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}
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trait Ref: Sized {
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fn meow() -> (Self, bool);
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}
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#[cfg(with_impl)]
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impl Ref for &'static [(); 0] {
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fn meow() -> (Self, bool) {
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(&[], false)
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}
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}
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impl Ref for &'static mut [(); 0] {
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fn meow() -> (Self, bool) {
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(&mut [], true)
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}
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}
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let (&_, b) = generic(); //[without_impl]~ ERROR: the trait bound `&_: main::Ref` is not satisfied [E0277]
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assert!(!b);
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}
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