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[rustc.git] / src / test / ui / lub-glb / old-lub-glb-hr-eq.rs

// 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() {}