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Test null pointer optimization of Result<(), Error>

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David Tolnay 2019-10-08 13:02:09 -07:00
parent 63f14dbd49
commit 95e25cf787
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1 changed files with 5 additions and 0 deletions
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tests/test_repr.rs
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@ -13,6 +13,11 @@ fn test_error_size() {
assert_eq!(mem::size_of::<Error>(), mem::size_of::<usize>()); assert_eq!(mem::size_of::<Error>(), mem::size_of::<usize>());
} }
#[test]
fn test_null_pointer_optimization() {
assert_eq!(mem::size_of::<Result<(), Error>>(), mem::size_of::<usize>());
}
#[test] #[test]
fn test_autotraits() { fn test_autotraits() {
fn assert<E: Unpin + Send + Sync + 'static>() {} fn assert<E: Unpin + Send + Sync + 'static>() {}