mirror of
https://github.com/rust-lang/rust.git
synced 2024-10-31 14:31:55 +00:00
46 lines
1.3 KiB
Rust
46 lines
1.3 KiB
Rust
// run-pass
|
|
// Test a ZST enum whose dicriminant is ~0i128. This caused an ICE when casting to an i32.
|
|
use std::hint::black_box;
|
|
|
|
#[derive(Copy, Clone)]
|
|
enum Nums {
|
|
NegOne = -1,
|
|
}
|
|
|
|
const NEG_ONE_I8: i8 = Nums::NegOne as i8;
|
|
const NEG_ONE_I16: i16 = Nums::NegOne as i16;
|
|
const NEG_ONE_I32: i32 = Nums::NegOne as i32;
|
|
const NEG_ONE_I64: i64 = Nums::NegOne as i64;
|
|
const NEG_ONE_I128: i128 = Nums::NegOne as i128;
|
|
|
|
fn test_as_arg(n: Nums) {
|
|
assert_eq!(-1i8, n as i8);
|
|
assert_eq!(-1i16, n as i16);
|
|
assert_eq!(-1i32, n as i32);
|
|
assert_eq!(-1i64, n as i64);
|
|
assert_eq!(-1i128, n as i128);
|
|
}
|
|
|
|
fn main() {
|
|
let kind = Nums::NegOne;
|
|
assert_eq!(-1i8, kind as i8);
|
|
assert_eq!(-1i16, kind as i16);
|
|
assert_eq!(-1i32, kind as i32);
|
|
assert_eq!(-1i64, kind as i64);
|
|
assert_eq!(-1i128, kind as i128);
|
|
|
|
assert_eq!(-1i8, black_box(kind) as i8);
|
|
assert_eq!(-1i16, black_box(kind) as i16);
|
|
assert_eq!(-1i32, black_box(kind) as i32);
|
|
assert_eq!(-1i64, black_box(kind) as i64);
|
|
assert_eq!(-1i128, black_box(kind) as i128);
|
|
|
|
test_as_arg(Nums::NegOne);
|
|
|
|
assert_eq!(-1i8, NEG_ONE_I8);
|
|
assert_eq!(-1i16, NEG_ONE_I16);
|
|
assert_eq!(-1i32, NEG_ONE_I32);
|
|
assert_eq!(-1i64, NEG_ONE_I64);
|
|
assert_eq!(-1i128, NEG_ONE_I128);
|
|
}
|