[Merged by Bors] - Add safe constructors for untyped pointers Ptr and PtrMut
#6539
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# Objective
Currently, `Ptr` and `PtrMut` can only be constructed via unsafe code. This means that downgrading a reference to an untyped pointer is very cumbersome, despite being a very simple operation.
## Solution
Define conversions for easily and safely constructing untyped pointers. This is the non-owned counterpart to `OwningPtr::make`.
Before:
```rust
let ptr = unsafe { PtrMut::new(NonNull::from(&mut value).cast()) };
```
After:
```rust
let ptr = PtrMut::from(&mut value);
```
Co-authored-by: Carter Anderson <[email protected]>
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Ptr and PtrMutPtr and PtrMut
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…gine#6539) # Objective Currently, `Ptr` and `PtrMut` can only be constructed via unsafe code. This means that downgrading a reference to an untyped pointer is very cumbersome, despite being a very simple operation. ## Solution Define conversions for easily and safely constructing untyped pointers. This is the non-owned counterpart to `OwningPtr::make`. Before: ```rust let ptr = unsafe { PtrMut::new(NonNull::from(&mut value).cast()) }; ``` After: ```rust let ptr = PtrMut::from(&mut value); ``` Co-authored-by: Carter Anderson <[email protected]>
alradish
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Jan 22, 2023
…gine#6539) # Objective Currently, `Ptr` and `PtrMut` can only be constructed via unsafe code. This means that downgrading a reference to an untyped pointer is very cumbersome, despite being a very simple operation. ## Solution Define conversions for easily and safely constructing untyped pointers. This is the non-owned counterpart to `OwningPtr::make`. Before: ```rust let ptr = unsafe { PtrMut::new(NonNull::from(&mut value).cast()) }; ``` After: ```rust let ptr = PtrMut::from(&mut value); ``` Co-authored-by: Carter Anderson <[email protected]>
ItsDoot
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Feb 1, 2023
…gine#6539) # Objective Currently, `Ptr` and `PtrMut` can only be constructed via unsafe code. This means that downgrading a reference to an untyped pointer is very cumbersome, despite being a very simple operation. ## Solution Define conversions for easily and safely constructing untyped pointers. This is the non-owned counterpart to `OwningPtr::make`. Before: ```rust let ptr = unsafe { PtrMut::new(NonNull::from(&mut value).cast()) }; ``` After: ```rust let ptr = PtrMut::from(&mut value); ``` Co-authored-by: Carter Anderson <[email protected]>
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Objective
Currently,
PtrandPtrMutcan only be constructed via unsafe code. This means that downgrading a reference to an untyped pointer is very cumbersome, despite being a very simple operation.Solution
Define conversions for easily and safely constructing untyped pointers. This is the non-owned counterpart to
OwningPtr::make.Before:
After: