e5e5fb9d80
This intrinsic doesn't drop the value that is not selected so this is manually done in the public function that wraps the intrinsic.
23 lines
626 B
Rust
23 lines
626 B
Rust
#[test]
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fn select_unpredictable_drop() {
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use core::cell::Cell;
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struct X<'a>(&'a Cell<bool>);
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impl Drop for X<'_> {
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fn drop(&mut self) {
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self.0.set(true);
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}
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}
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let a_dropped = Cell::new(false);
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let b_dropped = Cell::new(false);
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let a = X(&a_dropped);
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let b = X(&b_dropped);
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assert!(!a_dropped.get());
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assert!(!b_dropped.get());
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let selected = core::hint::select_unpredictable(core::hint::black_box(true), a, b);
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assert!(!a_dropped.get());
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assert!(b_dropped.get());
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drop(selected);
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assert!(a_dropped.get());
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assert!(b_dropped.get());
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}
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