pub struct Ptr<'a>(_, _);
Expand description
Type-erased borrow of some unknown type chosen when constructing this type.
This type tries to act “borrow-like” which means that:
- It should be considered immutable: its target must not be changed while this pointer is alive.
- It must always points to a valid value of whatever the pointee type is.
- The lifetime
'a
accurately represents how long the pointer is valid for.
It may be helpful to think of this type as similar to &'a dyn Any
but without
the metadata and able to point to data that does not correspond to a Rust type.
Implementations§
§impl Ptr<'_>
impl Ptr<'_>
pub unsafe fn byte_offset(self, count: isize) -> Ptr<'_>
pub unsafe fn byte_offset(self, count: isize) -> Ptr<'_>
Calculates the offset from a pointer.
As the pointer is type-erased, there is no size information available. The provided
count
parameter is in raw bytes.
See also: ptr::offset
Safety
the offset cannot make the existing ptr null, or take it out of bounds for its allocation.
pub unsafe fn byte_add(self, count: usize) -> Ptr<'_>
pub unsafe fn byte_add(self, count: usize) -> Ptr<'_>
Calculates the offset from a pointer (convenience for .offset(count as isize)
).
As the pointer is type-erased, there is no size information available. The provided
count
parameter is in raw bytes.
See also: ptr::add
Safety
the offset cannot make the existing ptr null, or take it out of bounds for its allocation.
Trait Implementations§
Auto Trait Implementations§
impl<'a> RefUnwindSafe for Ptr<'a>
impl<'a> !Send for Ptr<'a>
impl<'a> !Sync for Ptr<'a>
impl<'a> Unpin for Ptr<'a>
impl<'a> UnwindSafe for Ptr<'a>
Blanket Implementations§
§impl<T, U> AsBindGroupShaderType<U> for Twhere
U: ShaderType,
&'a T: for<'a> Into<U>,
impl<T, U> AsBindGroupShaderType<U> for Twhere
U: ShaderType,
&'a T: for<'a> Into<U>,
§fn as_bind_group_shader_type(&self, _images: &RenderAssets<Image>) -> U
fn as_bind_group_shader_type(&self, _images: &RenderAssets<Image>) -> U
T
ShaderType
for self
. When used in AsBindGroup
derives, it is safe to assume that all images in self
exist. Read more§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere
T: Any,
§fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>
fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>
Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
. Read more§fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
. Read more§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
&Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s. Read more§fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
&mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s. Read more