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Change description from compiletest to regression test Co-authored-by: 许杰友 Jieyou Xu (Joe) <39484203+jieyouxu@users.noreply.github.com> Improve test name, location, and description Update tests/ui/impl-trait/impl-fn-rpit-opaque-107883.rs Co-authored-by: waffle <waffle.lapkin@gmail.com>
38 lines
648 B
Rust
38 lines
648 B
Rust
//@ check-pass
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// Regression test for <https;//github.com/rust-lang/rust/issues/107883>
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#![feature(impl_trait_in_fn_trait_return)]
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#![feature(unboxed_closures)] // only for `h`
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use std::fmt::Debug;
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fn f<T>() -> impl Fn(T) -> impl Debug {
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|_x| 15
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}
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fn g<T>() -> impl MyFn<(T,), Out = impl Debug> {
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|_x| 15
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}
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trait MyFn<T> {
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type Out;
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}
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impl<T, U, F: Fn(T) -> U> MyFn<(T,)> for F {
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type Out = U;
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}
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fn h<T>() -> impl Fn<(T,), Output = impl Debug> {
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|_x| 15
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}
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fn f_<T>() -> impl Fn(T) -> impl Debug {
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std::convert::identity(|_x| 15)
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}
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fn f__<T>() -> impl Fn(T) -> impl Debug {
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let r = |_x| 15;
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r
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}
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fn main() {}
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