34 lines
674 B
Rust
34 lines
674 B
Rust
// run-pass
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use std::cell::Cell;
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use std::mem;
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struct Aligned<'a> {
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drop_count: &'a Cell<usize>
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}
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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<'a> Drop for Aligned<'a> {
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fn drop(&mut self) {
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check_align(self);
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self.drop_count.set(self.drop_count.get() + 1);
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}
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}
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#[repr(packed)]
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struct Packed<'a>(u8, Aligned<'a>);
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fn main() {
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let drop_count = &Cell::new(0);
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{
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let mut p = Packed(0, Aligned { drop_count });
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p.1 = Aligned { drop_count };
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assert_eq!(drop_count.get(), 1);
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}
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assert_eq!(drop_count.get(), 2);
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}
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