2 #![feature(core_intrinsics)]
4 use std::intrinsics::discriminant_value;
22 for<'a> T: Fn(&'a isize),
24 let v: Vec<T> = Vec::new();
25 let _: u8 = discriminant_value(&v);
29 // check that we use `u8` as the discriminant value
30 // for everything that is not an enum.
31 check(discriminant_value(&true));
32 check(discriminant_value(&'a'));
33 check(discriminant_value(&7));
34 check(discriminant_value(&7.0));
35 check(discriminant_value(&Zst));
36 check(discriminant_value(&Struct { _a: 7 }));
37 check(discriminant_value(&Union { _a: 7 }));
38 check(discriminant_value(&[7, 77]));
39 check(discriminant_value(&(7 as *const ())));
40 check(discriminant_value(&(7 as *mut ())));
41 check(discriminant_value(&&7));
42 check(discriminant_value(&&mut 7));
43 check(discriminant_value(&check));
44 let fn_ptr: fn(u8) = check;
45 check(discriminant_value(&fn_ptr));
46 let hrtb: for<'a> fn(&'a str) -> &'a str = |x| x;
47 check(discriminant_value(&hrtb));
48 check(discriminant_value(&(7, 77, 777)));