Remove T: Sized on ptr::is_null()
#46094
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This reverts commit 604f049. This is purely a revert of cuviper's revert "Restore `T: Sized` on `ptr::is_null`". So double revert means this is code written by cuviper!
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@rfcbot fcp merge |
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🔔 This is now entering its final comment period, as per the review above. 🔔 |
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🔔 This is now entering its final comment period, as per the review above. 🔔 |
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Remove `T: Sized` on `ptr::is_null()` Originally from #44932 -- this is purely a revert of the last commit of that PR, which was removing some changes from the previous commits in the PR. So a revert of a revert means this is code written by @cuviper! @mikeyhew makes a compelling case in rust-lang/rfcs#433 (comment) for why this is the right way to implement `is_null` for trait objects. And the behavior for slices makes sense to me as well. ```diff impl<T: ?Sized> *const T { - pub fn is_null(self) -> bool where T: Sized; + pub fn is_null(self) -> bool; } impl<T: ?Sized> *mut T { - pub fn is_null(self) -> bool where T: Sized; + pub fn is_null(self) -> bool; }
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☀️ Test successful - status-appveyor, status-travis |
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This was already true, as we require rust-lang/rust#46094 to compile. This commit ensures that we test for this on CI so we know if this changes in the future.
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Originally from #44932 -- this is purely a revert of the last commit of that PR, which was removing some changes from the previous commits in the PR. So a revert of a revert means this is code written by @cuviper!
@mikeyhew makes a compelling case in rust-lang/rfcs#433 (comment) for why this is the right way to implement
is_nullfor trait objects. And the behavior for slices makes sense to me as well.impl<T: ?Sized> *const T { - pub fn is_null(self) -> bool where T: Sized; + pub fn is_null(self) -> bool; } impl<T: ?Sized> *mut T { - pub fn is_null(self) -> bool where T: Sized; + pub fn is_null(self) -> bool; }