26 lines
760 B
Rust
26 lines
760 B
Rust
// Copyright 2017 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.
|
|
|
|
// This should never be allowed -- `foo.a` and `foo.b` are
|
|
// overlapping, so since `x` is not `mut` we should not permit
|
|
// reassignment.
|
|
|
|
union Foo {
|
|
a: u32,
|
|
b: u32,
|
|
}
|
|
|
|
unsafe fn overlapping_fields() {
|
|
let x: Foo;
|
|
x.a = 1; //~ ERROR
|
|
x.b = 22; //~ ERROR
|
|
}
|
|
|
|
fn main() { }
|