31 lines
694 B
Rust
31 lines
694 B
Rust
|
// See https://github.com/rust-lang/rust/issues/88470
|
||
|
|
//@ run-rustfix
|
||
|
|
//@ edition:2018
|
||
|
|
//@ check-pass
|
||
|
|
#![warn(rust_2021_prelude_collisions)]
|
||
|
|
#![allow(dead_code)]
|
||
|
|
#![allow(unused_imports)]
|
||
|
|
|
||
|
|
pub trait PyTryFrom<'v, T>: Sized {
|
||
|
|
fn try_from<V>(value: V) -> Result<&'v Self, T>;
|
||
|
|
}
|
||
|
|
|
||
|
|
pub trait PyTryInto<T>: Sized {
|
||
|
|
fn try_into(&self) -> Result<&T, i32>;
|
||
|
|
}
|
||
|
|
|
||
|
|
struct Foo;
|
||
|
|
|
||
|
|
impl<U> PyTryInto<U> for Foo
|
||
|
|
where
|
||
|
|
U: for<'v> PyTryFrom<'v, i32>,
|
||
|
|
{
|
||
|
|
fn try_into(&self) -> Result<&U, i32> {
|
||
|
|
U::try_from(self)
|
||
|
|
//~^ WARNING trait-associated function `try_from` will become ambiguous in Rust 2021
|
||
|
|
//~| this is accepted in the current edition (Rust 2018)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fn main() {}
|