1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
// Copyright 2018 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.
#![feature(const_fn)]
type Field1 = i32;
type Field3 = i64;
union DummyUnion {
field1: Field1,
field3: Field3,
}
const UNION: DummyUnion = DummyUnion { field1: 1065353216 };
const FIELD3: Field3 = unsafe { UNION.field3 }; //~ ERROR this constant cannot be used
const FIELD_PATH: Struct = Struct { //~ ERROR this constant likely exhibits undefined behavior
a: 42,
b: unsafe { UNION.field3 },
};
struct Struct {
a: u8,
b: Field3,
}
const FIELD_PATH2: Struct2 = Struct2 { //~ ERROR this constant likely exhibits undefined behavior
b: [
21,
unsafe { UNION.field3 },
23,
24,
],
a: 42,
};
struct Struct2 {
b: [Field3; 4],
a: u8,
}
fn main() {
}
|