| // Copyright 2015 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // Issue 23030: Workaround overflowing discriminant |
| // with explicit assignments. |
| |
| // See also compile-fail/overflow-discrim.rs, which shows what |
| // happens if you leave the OhNo explicit cases out here. |
| |
| use std::{i8,u8,i16,u16,i32,u32,i64,u64,isize,usize}; |
| |
| fn f_i8() { |
| #[repr(i8)] |
| enum A { |
| Ok = i8::MAX - 1, |
| Ok2, |
| OhNo = i8::MIN, |
| NotTheEnd = -1, |
| Zero, |
| } |
| |
| let _x = (A::Ok, A::Ok2, A::OhNo); |
| let z = (A::NotTheEnd, A::Zero).1 as i8; |
| assert_eq!(z, 0); |
| } |
| |
| fn f_u8() { |
| #[repr(u8)] |
| enum A { |
| Ok = u8::MAX - 1, |
| Ok2, |
| OhNo = u8::MIN, |
| } |
| |
| let _x = (A::Ok, A::Ok2, A::OhNo); |
| } |
| |
| fn f_i16() { |
| #[repr(i16)] |
| enum A { |
| Ok = i16::MAX - 1, |
| Ok2, |
| OhNo = i16::MIN, |
| NotTheEnd = -1, |
| Zero, |
| } |
| |
| let _x = (A::Ok, A::Ok2, A::OhNo); |
| let z = (A::NotTheEnd, A::Zero).1 as i16; |
| assert_eq!(z, 0); |
| } |
| |
| fn f_u16() { |
| #[repr(u16)] |
| enum A { |
| Ok = u16::MAX - 1, |
| Ok2, |
| OhNo = u16::MIN, |
| } |
| |
| let _x = (A::Ok, A::Ok2, A::OhNo); |
| } |
| |
| fn f_i32() { |
| #[repr(i32)] |
| enum A { |
| Ok = i32::MAX - 1, |
| Ok2, |
| OhNo = i32::MIN, |
| NotTheEnd = -1, |
| Zero, |
| } |
| |
| let _x = (A::Ok, A::Ok2, A::OhNo); |
| let z = (A::NotTheEnd, A::Zero).1 as i32; |
| assert_eq!(z, 0); |
| } |
| |
| fn f_u32() { |
| #[repr(u32)] |
| enum A { |
| Ok = u32::MAX - 1, |
| Ok2, |
| OhNo = u32::MIN, |
| } |
| |
| let _x = (A::Ok, A::Ok2, A::OhNo); |
| } |
| |
| fn f_i64() { |
| #[repr(i64)] |
| enum A { |
| Ok = i64::MAX - 1, |
| Ok2, |
| OhNo = i64::MIN, |
| NotTheEnd = -1, |
| Zero, |
| } |
| |
| let _x = (A::Ok, A::Ok2, A::OhNo); |
| let z = (A::NotTheEnd, A::Zero).1 as i64; |
| assert_eq!(z, 0); |
| } |
| |
| fn f_u64() { |
| #[repr(u64)] |
| enum A { |
| Ok = u64::MAX - 1, |
| Ok2, |
| OhNo = u64::MIN, |
| } |
| |
| let _x = (A::Ok, A::Ok2, A::OhNo); |
| } |
| |
| fn f_isize() { |
| #[repr(isize)] |
| enum A { |
| Ok = isize::MAX - 1, |
| Ok2, |
| OhNo = isize::MIN, |
| NotTheEnd = -1, |
| Zero, |
| } |
| |
| let _x = (A::Ok, A::Ok2, A::OhNo); |
| let z = (A::NotTheEnd, A::Zero).1 as isize; |
| assert_eq!(z, 0); |
| } |
| |
| fn f_usize() { |
| #[repr(usize)] |
| enum A { |
| Ok = usize::MAX - 1, |
| Ok2, |
| OhNo = usize::MIN, |
| } |
| |
| let _x = (A::Ok, A::Ok2, A::OhNo); |
| } |
| |
| fn main() { |
| f_i8(); f_u8(); |
| f_i16(); f_u16(); |
| f_i32(); f_u32(); |
| f_i64(); f_u64(); |
| |
| f_isize(); f_usize(); |
| } |