2 #![allow(stable_features)]
3 #![feature(core, core_intrinsics)]
6 use core::intrinsics::discriminant_value;
30 #[allow(unused_tuple_struct_fields)]
36 enum NullablePointer {
37 Something(#[allow(unused_tuple_struct_fields)] &'static u32),
41 static CONST : u32 = 0xBEEF;
55 assert_eq!(discriminant_value(&CLike1::A), 0isize);
56 assert_eq!(discriminant_value(&CLike1::B), 1);
57 assert_eq!(discriminant_value(&CLike1::C), 2);
58 assert_eq!(discriminant_value(&CLike1::D), 3);
60 assert_eq!(discriminant_value(&CLike2::A), 5isize);
61 assert_eq!(discriminant_value(&CLike2::B), 2);
62 assert_eq!(discriminant_value(&CLike2::C), 19);
63 assert_eq!(discriminant_value(&CLike2::D), 20);
65 assert_eq!(discriminant_value(&CLike3::A), 5i8);
66 assert_eq!(discriminant_value(&CLike3::B), 6);
67 assert_eq!(discriminant_value(&CLike3::C), -1);
68 assert_eq!(discriminant_value(&CLike3::D), 0);
70 assert_eq!(discriminant_value(&ADT::First(0,0)), 0isize);
71 assert_eq!(discriminant_value(&ADT::Second(5)), 1);
73 assert_eq!(discriminant_value(&NullablePointer::Nothing), 1isize);
74 assert_eq!(discriminant_value(&NullablePointer::Something(&CONST)), 0);
76 assert_eq!(discriminant_value(&10), 0u8);
77 assert_eq!(discriminant_value(&"test"), 0u8);
79 assert_eq!(discriminant_value(&Mixed::Unit), 3isize);
80 assert_eq!(discriminant_value(&Mixed::Tuple(5)), 2);
81 assert_eq!(discriminant_value(&Mixed::Struct{a: 7, b: 11}), 1);