mirror of https://github.com/rust-lang/rust
30 lines
468 B
Rust
30 lines
468 B
Rust
//@ run-pass
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#![allow(dead_code)]
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#![allow(deprecated)]
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use std::mem;
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enum Tag {
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TagInner(u64)
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}
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struct Rec {
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c8: u8,
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t: Tag
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}
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fn mk_rec() -> Rec {
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return Rec { c8:0, t:Tag::TagInner(0) };
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}
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fn is_u64_aligned(u: &Tag) -> bool {
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let p: usize = unsafe { mem::transmute(u) };
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let u64_align = std::mem::min_align_of::<u64>();
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return (p & (u64_align - 1)) == 0;
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}
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pub fn main() {
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let x = mk_rec();
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assert!(is_u64_aligned(&x.t));
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}
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