40 lines
988 B
Rust
40 lines
988 B
Rust
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// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// compile-flags: -O
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#![allow(dead_code)]
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#[repr(C, u8)]
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enum ReprCu8 {
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A(u16),
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B,
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}
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#[repr(C)]
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struct ReprC {
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tag: u8,
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padding: u8,
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payload: u16,
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}
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fn main() {
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let r1 = ReprC { tag: 0, padding: 0, payload: 0 };
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let r2 = ReprC { tag: 0, padding: 1, payload: 1 };
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let t1: &ReprCu8 = unsafe { std::mem::transmute(&r1) };
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let t2: &ReprCu8 = unsafe { std::mem::transmute(&r2) };
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match (t1, t2) {
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(ReprCu8::A(_), ReprCu8::A(_)) => (),
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_ => assert!(false)
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};
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}
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