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note about stack-allocated variables being allocated objects

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Ralf Jung
2019-08-05 18:41:33 +02:00
parent 4be0675589
commit aa72b1d3e3
1 changed files with 16 additions and 8 deletions
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src/libcore/ptr/mod.rs
+16 -8
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@@ -1120,7 +1120,8 @@ pub unsafe fn as_ref<'a>(self) -> Option<&'a T> {
/// Behavior:
///
/// * Both the starting and resulting pointer must be either in bounds or one
/// byte past the end of the same allocated object.
/// byte past the end of the same allocated object. Note that in Rust,
/// every (stack-allocated) variable is considered a separate allocated object.
///
/// * The computed offset, **in bytes**, cannot overflow an `isize`.
///
@@ -1223,7 +1224,8 @@ pub fn wrapping_offset(self, count: isize) -> *const T where T: Sized {
/// Behavior:
///
/// * Both the starting and other pointer must be either in bounds or one
/// byte past the end of the same allocated object.
/// byte past the end of the same allocated object. Note that in Rust,
/// every (stack-allocated) variable is considered a separate allocated object.
///
/// * The distance between the pointers, **in bytes**, cannot overflow an `isize`.
///
@@ -1338,7 +1340,8 @@ pub fn wrapping_offset_from(self, origin: *const T) -> isize where T: Sized {
/// Behavior:
///
/// * Both the starting and resulting pointer must be either in bounds or one
/// byte past the end of the same allocated object.
/// byte past the end of the same allocated object. Note that in Rust,
/// every (stack-allocated) variable is considered a separate allocated object.
///
/// * The computed offset, **in bytes**, cannot overflow an `isize`.
///
@@ -1395,7 +1398,8 @@ pub unsafe fn add(self, count: usize) -> Self
/// Behavior:
///
/// * Both the starting and resulting pointer must be either in bounds or one
/// byte past the end of the same allocated object.
/// byte past the end of the same allocated object. Note that in Rust,
/// every (stack-allocated) variable is considered a separate allocated object.
///
/// * The computed offset cannot exceed `isize::MAX` **bytes**.
///
@@ -1755,7 +1759,8 @@ pub unsafe fn as_ref<'a>(self) -> Option<&'a T> {
/// Behavior:
///
/// * Both the starting and resulting pointer must be either in bounds or one
/// byte past the end of the same allocated object.
/// byte past the end of the same allocated object. Note that in Rust,
/// every (stack-allocated) variable is considered a separate allocated object.
///
/// * The computed offset, **in bytes**, cannot overflow an `isize`.
///
@@ -1901,7 +1906,8 @@ pub unsafe fn as_mut<'a>(self) -> Option<&'a mut T> {
/// Behavior:
///
/// * Both the starting and other pointer must be either in bounds or one
/// byte past the end of the same allocated object.
/// byte past the end of the same allocated object. Note that in Rust,
/// every (stack-allocated) variable is considered a separate allocated object.
///
/// * The distance between the pointers, **in bytes**, cannot overflow an `isize`.
///
@@ -2005,7 +2011,8 @@ pub fn wrapping_offset_from(self, origin: *const T) -> isize where T: Sized {
/// Behavior:
///
/// * Both the starting and resulting pointer must be either in bounds or one
/// byte past the end of the same allocated object.
/// byte past the end of the same allocated object. Note that in Rust,
/// every (stack-allocated) variable is considered a separate allocated object.
///
/// * The computed offset, **in bytes**, cannot overflow an `isize`.
///
@@ -2062,7 +2069,8 @@ pub unsafe fn add(self, count: usize) -> Self
/// Behavior:
///
/// * Both the starting and resulting pointer must be either in bounds or one
/// byte past the end of the same allocated object.
/// byte past the end of the same allocated object. Note that in Rust,
/// every (stack-allocated) variable is considered a separate allocated object.
///
/// * The computed offset cannot exceed `isize::MAX` **bytes**.
///