46 lines
1.2 KiB
Rust
46 lines
1.2 KiB
Rust
// Copyright 2017 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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// check that derive on a packed struct does not call field
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// methods with a misaligned field.
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use std::mem;
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#[derive(Copy, Clone)]
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struct Aligned(usize);
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#[inline(never)]
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fn check_align(ptr: *const Aligned) {
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assert_eq!(ptr as usize % mem::align_of::<Aligned>(),
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0);
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}
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impl PartialEq for Aligned {
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fn eq(&self, other: &Self) -> bool {
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check_align(self);
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check_align(other);
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self.0 == other.0
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}
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}
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#[repr(packed)]
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#[derive(Copy, Clone, PartialEq)]
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struct Packed(Aligned, Aligned);
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#[derive(PartialEq)]
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#[repr(C)]
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struct Dealigned<T>(u8, T);
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fn main() {
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let d1 = Dealigned(0, Packed(Aligned(1), Aligned(2)));
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let ck = d1 == d1;
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assert!(ck);
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}
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