Struct composable_allocators::Impossible

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pub struct Impossible(pub !);

Tuple Fields

0: !

Trait Implementations

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impl Allocator for Impossible

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fn allocate(&self, _layout: Layout) -> Result<NonNull<[u8 ]>, AllocError>

🔬 This is a nightly-only experimental API. (allocator_api)

Attempts to allocate a block of memory. Read more

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unsafe fn deallocate(&self, _ptr: NonNull<u8>, _layout: Layout)

🔬 This is a nightly-only experimental API. (allocator_api)

Deallocates the memory referenced by ptr. Read more

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unsafe fn grow(
 &self,
 _ptr: NonNull<u8>,
 _old_layout: Layout,
 _new_layout: Layout
) -> Result<NonNull<[u8 ]>, AllocError>

🔬 This is a nightly-only experimental API. (allocator_api)

Attempts to extend the memory block. Read more

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unsafe fn shrink(
 &self,
 _ptr: NonNull<u8>,
 _old_layout: Layout,
 _new_layout: Layout
) -> Result<NonNull<[u8 ]>, AllocError>

🔬 This is a nightly-only experimental API. (allocator_api)

Attempts to shrink the memory block. Read more

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fn allocate_zeroed(&self, layout: Layout) -> Result<NonNull<[u8 ]>, AllocError>

🔬 This is a nightly-only experimental API. (allocator_api)

Behaves like allocate, but also ensures that the returned memory is zero-initialized. Read more

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unsafe fn grow_zeroed(
 &self,
 ptr: NonNull<u8>,
 old_layout: Layout,
 new_layout: Layout
) -> Result<NonNull<[u8 ]>, AllocError>

🔬 This is a nightly-only experimental API. (allocator_api)

Behaves like grow, but also ensures that the new contents are set to zero before being returned. Read more

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fn by_ref(&self) -> &Self

🔬 This is a nightly-only experimental API. (allocator_api)

Creates a “by reference” adapter for this instance of Allocator. Read more

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impl Clone for Impossible

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fn clone(&self) -> Impossible

Returns a copy of the value. Read more

1.0.0 · source

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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impl Copy for Impossible

Auto Trait Implementations

impl RefUnwindSafe for Impossible

impl Send for Impossible

impl Sync for Impossible

impl Unpin for Impossible

impl UnwindSafe for Impossible

Blanket Implementations

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impl<T> Any for T where
T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Struct composable_allocators::Impossible

Tuple Fields

Trait Implementations

impl Allocator for Impossible

fn allocate(&self, _layout: Layout) -> Result<NonNull<[u8]>, AllocError>

unsafe fn deallocate(&self, _ptr: NonNull<u8>, _layout: Layout)

unsafe fn grow( &self, _ptr: NonNull<u8>, _old_layout: Layout, _new_layout: Layout) -> Result<NonNull<[u8]>, AllocError>

unsafe fn shrink( &self, _ptr: NonNull<u8>, _old_layout: Layout, _new_layout: Layout) -> Result<NonNull<[u8]>, AllocError>

fn allocate_zeroed(&self, layout: Layout) -> Result<NonNull<[u8]>, AllocError>

unsafe fn grow_zeroed( &self, ptr: NonNull<u8>, old_layout: Layout, new_layout: Layout) -> Result<NonNull<[u8]>, AllocError>

fn by_ref(&self) -> &Self

impl Clone for Impossible

fn clone(&self) -> Impossible

fn clone_from(&mut self, source: &Self)

impl Fallbackable for Impossible

unsafe fn has_allocated(&self, _ptr: NonNull<u8>, _layout: Layout) -> bool

fn allows_fallback(&self, _layout: Layout) -> bool

impl Copy for Impossible

Auto Trait Implementations

impl RefUnwindSafe for Impossible

impl Send for Impossible

impl Sync for Impossible

impl Unpin for Impossible

impl UnwindSafe for Impossible

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for T where U: From<T>,

fn into(self) -> U

impl<T> ToOwned for T where T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

fn allocate(&self, _layout: Layout) -> Result<NonNull<[u8 ]>, AllocError>

unsafe fn grow(
&self,
_ptr: NonNull<u8>,
_old_layout: Layout,
_new_layout: Layout
) -> Result<NonNull<[u8 ]>, AllocError>

unsafe fn shrink(
&self,
_ptr: NonNull<u8>,
_old_layout: Layout,
_new_layout: Layout
) -> Result<NonNull<[u8 ]>, AllocError>

fn allocate_zeroed(&self, layout: Layout) -> Result<NonNull<[u8 ]>, AllocError>

unsafe fn grow_zeroed(
&self,
ptr: NonNull<u8>,
old_layout: Layout,
new_layout: Layout
) -> Result<NonNull<[u8 ]>, AllocError>

impl<T> Any for T where
T: 'static + ?Sized,

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<T, U> Into<U> for T where
U: From<T>,

impl<T> ToOwned for T where
T: Clone,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,