projects / rustc.git / blame
| Commit | Line | Data |
|---|---|---|
| b7449926 | 1 | // run-pass |
| c34b1796 AL |
2 | // Issue 23030: Workaround overflowing discriminant |
| 3 | // with explicit assignments. | |
| 4 | ||
| 5 | // See also compile-fail/overflow-discrim.rs, which shows what | |
| 6 | // happens if you leave the OhNo explicit cases out here. | |
| 7 | ||
| 8 | use std::{i8,u8,i16,u16,i32,u32,i64,u64,isize,usize}; | |
| 9 | ||
| 10 | fn f_i8() { | |
| 11 | #[repr(i8)] | |
| 12 | enum A { | |
| 13 | Ok = i8::MAX - 1, | |
| 14 | Ok2, | |
| 15 | OhNo = i8::MIN, | |
| 16 | NotTheEnd = -1, | |
| 17 | Zero, | |
| 18 | } | |
| 19 | ||
| 20 | let _x = (A::Ok, A::Ok2, A::OhNo); | |
| 21 | let z = (A::NotTheEnd, A::Zero).1 as i8; | |
| 22 | assert_eq!(z, 0); | |
| 23 | } | |
| 24 | ||
| 25 | fn f_u8() { | |
| 26 | #[repr(u8)] | |
| 27 | enum A { | |
| 28 | Ok = u8::MAX - 1, | |
| 29 | Ok2, | |
| 30 | OhNo = u8::MIN, | |
| 31 | } | |
| 32 | ||
| 33 | let _x = (A::Ok, A::Ok2, A::OhNo); | |
| 34 | } | |
| 35 | ||
| 36 | fn f_i16() { | |
| 37 | #[repr(i16)] | |
| 38 | enum A { | |
| 39 | Ok = i16::MAX - 1, | |
| 40 | Ok2, | |
| 41 | OhNo = i16::MIN, | |
| 42 | NotTheEnd = -1, | |
| 43 | Zero, | |
| 44 | } | |
| 45 | ||
| 46 | let _x = (A::Ok, A::Ok2, A::OhNo); | |
| 47 | let z = (A::NotTheEnd, A::Zero).1 as i16; | |
| 48 | assert_eq!(z, 0); | |
| 49 | } | |
| 50 | ||
| 51 | fn f_u16() { | |
| 52 | #[repr(u16)] | |
| 53 | enum A { | |
| 54 | Ok = u16::MAX - 1, | |
| 55 | Ok2, | |
| 56 | OhNo = u16::MIN, | |
| 57 | } | |
| 58 | ||
| 59 | let _x = (A::Ok, A::Ok2, A::OhNo); | |
| 60 | } | |
| 61 | ||
| 62 | fn f_i32() { | |
| 63 | #[repr(i32)] | |
| 64 | enum A { | |
| 65 | Ok = i32::MAX - 1, | |
| 66 | Ok2, | |
| 67 | OhNo = i32::MIN, | |
| 68 | NotTheEnd = -1, | |
| 69 | Zero, | |
| 70 | } | |
| 71 | ||
| 72 | let _x = (A::Ok, A::Ok2, A::OhNo); | |
| 73 | let z = (A::NotTheEnd, A::Zero).1 as i32; | |
| 74 | assert_eq!(z, 0); | |
| 75 | } | |
| 76 | ||
| 77 | fn f_u32() { | |
| 78 | #[repr(u32)] | |
| 79 | enum A { | |
| 80 | Ok = u32::MAX - 1, | |
| 81 | Ok2, | |
| 82 | OhNo = u32::MIN, | |
| 83 | } | |
| 84 | ||
| 85 | let _x = (A::Ok, A::Ok2, A::OhNo); | |
| 86 | } | |
| 87 | ||
| 88 | fn f_i64() { | |
| 89 | #[repr(i64)] | |
| 90 | enum A { | |
| 91 | Ok = i64::MAX - 1, | |
| 92 | Ok2, | |
| 93 | OhNo = i64::MIN, | |
| 94 | NotTheEnd = -1, | |
| 95 | Zero, | |
| 96 | } | |
| 97 | ||
| 98 | let _x = (A::Ok, A::Ok2, A::OhNo); | |
| 99 | let z = (A::NotTheEnd, A::Zero).1 as i64; | |
| 100 | assert_eq!(z, 0); | |
| 101 | } | |
| 102 | ||
| 103 | fn f_u64() { | |
| 104 | #[repr(u64)] | |
| 105 | enum A { | |
| 106 | Ok = u64::MAX - 1, | |
| 107 | Ok2, | |
| 108 | OhNo = u64::MIN, | |
| 109 | } | |
| 110 | ||
| 111 | let _x = (A::Ok, A::Ok2, A::OhNo); | |
| 112 | } | |
| 113 | ||
| 114 | fn f_isize() { | |
| 115 | #[repr(isize)] | |
| 116 | enum A { | |
| 117 | Ok = isize::MAX - 1, | |
| 118 | Ok2, | |
| 119 | OhNo = isize::MIN, | |
| 120 | NotTheEnd = -1, | |
| 121 | Zero, | |
| 122 | } | |
| 123 | ||
| 124 | let _x = (A::Ok, A::Ok2, A::OhNo); | |
| 125 | let z = (A::NotTheEnd, A::Zero).1 as isize; | |
| 126 | assert_eq!(z, 0); | |
| 127 | } | |
| 128 | ||
| 129 | fn f_usize() { | |
| 130 | #[repr(usize)] | |
| 131 | enum A { | |
| 132 | Ok = usize::MAX - 1, | |
| 133 | Ok2, | |
| 134 | OhNo = usize::MIN, | |
| 135 | } | |
| 136 | ||
| 137 | let _x = (A::Ok, A::Ok2, A::OhNo); | |
| 138 | } | |
| 139 | ||
| 140 | fn main() { | |
| 141 | f_i8(); f_u8(); | |
| 142 | f_i16(); f_u16(); | |
| 143 | f_i32(); f_u32(); | |
| 144 | f_i64(); f_u64(); | |
| 145 | ||
| 146 | f_isize(); f_usize(); | |
| 147 | } |