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Clarify the guarantees of Vec::as_ptr and Vec::as_mut_ptr when there's no allocation

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This commit is contained in:
Giacomo Stevanato
2022-05-29 17:43:35 +02:00
parent 512a328e2f
commit 8ef2dd70e6
1 changed files with 4 additions and 2 deletions
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6
library/alloc/src/vec/mod.rs
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@@ -1107,7 +1107,8 @@ impl<T, A: Allocator> Vec<T, A> {
self self
} }
/// Returns a raw pointer to the vector's buffer. /// Returns a raw pointer to the vector's buffer, or a dangling raw pointer
/// valid for zero sized reads if the vector didn't allocate.
/// ///
/// The caller must ensure that the vector outlives the pointer this /// The caller must ensure that the vector outlives the pointer this
/// function returns, or else it will end up pointing to garbage. /// function returns, or else it will end up pointing to garbage.
@@ -1144,7 +1145,8 @@ impl<T, A: Allocator> Vec<T, A> {
ptr ptr
} }
/// Returns an unsafe mutable pointer to the vector's buffer. /// Returns an unsafe mutable pointer to the vector's buffer, or a dangling
/// raw pointer valid for zero sized reads if the vector didn't allocate.
/// ///
/// The caller must ensure that the vector outlives the pointer this /// The caller must ensure that the vector outlives the pointer this
/// function returns, or else it will end up pointing to garbage. /// function returns, or else it will end up pointing to garbage.