mirror of https://github.com/rust-lang/rust
35 lines
864 B
Rust
35 lines
864 B
Rust
//@ run-pass
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// Checks that struct-literal expression order-of-eval is as expected
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// even when no Drop-implementations are involved.
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use std::sync::atomic::{Ordering, AtomicUsize};
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struct W { wrapped: u32 }
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struct S { f0: W, _f1: i32 }
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pub fn main() {
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const VAL: u32 = 0x89AB_CDEF;
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let w = W { wrapped: VAL };
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let s = S {
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_f1: { event(0x01); 23 },
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f0: { event(0x02); w },
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};
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assert_eq!(s.f0.wrapped, VAL);
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let actual = event_log();
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let expect = 0x01_02;
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assert!(expect == actual,
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"expect: 0x{:x} actual: 0x{:x}", expect, actual);
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}
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static LOG: AtomicUsize = AtomicUsize::new(0);
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fn event_log() -> usize {
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LOG.load(Ordering::SeqCst)
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}
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fn event(tag: u8) {
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let old_log = LOG.load(Ordering::SeqCst);
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let new_log = (old_log << 8) + tag as usize;
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LOG.store(new_log, Ordering::SeqCst);
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}
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