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// 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();
}