mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-05 21:24:12 +00:00
28 lines
824 B
Rust
28 lines
824 B
Rust
// Test that we give a note when the old LUB/GLB algorithm would have
|
|
// succeeded but the new code (which requires equality) gives an
|
|
// error. However, now that we handle subtyping correctly, we no
|
|
// longer get an error, because we recognize these two types as
|
|
// equivalent!
|
|
//
|
|
// check-pass
|
|
|
|
fn foo(x: fn(&u8, &u8), y: for<'a> fn(&'a u8, &'a u8)) {
|
|
// The two types above are actually equivalent. With the older
|
|
// leak check, though, we didn't consider them as equivalent, and
|
|
// hence we gave errors. But now we've fixed that.
|
|
let z = match 22 {
|
|
0 => x,
|
|
_ => y,
|
|
};
|
|
}
|
|
|
|
fn foo_cast(x: fn(&u8, &u8), y: for<'a> fn(&'a u8, &'a u8)) {
|
|
let z = match 22 {
|
|
// No error with an explicit cast:
|
|
0 => x as for<'a> fn(&'a u8, &'a u8),
|
|
_ => y,
|
|
};
|
|
}
|
|
|
|
fn main() {}
|