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Root

miniextendr_api::gc_protect

Struct Root 

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pub struct Root<'a> {
    sexp: SEXP,
    _scope: PhantomData<&'a ProtectScope>,
}
Expand description

A rooted SEXP tied to the lifetime of a ProtectScope.

This type has no Drop. The scope owns unprotection responsibility. This makes Root cheap to move and copy (it’s just a pointer + lifetime).

§Lifetime

The 'a lifetime ties the root to its creating scope. The compiler ensures you cannot use the root after the scope has been dropped.

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§sexp: SEXP§_scope: PhantomData<&'a ProtectScope>

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impl<'a> Root<'a>

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pub fn get(&self) -> SEXP

Get the underlying SEXP.

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pub fn into_raw(self) -> SEXP

Consume the root and return the underlying SEXP.

The SEXP remains protected until the scope drops.

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impl<'a> Clone for Root<'a>

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fn clone(&self) -> Root<'a>

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl<'a> Deref for Root<'a>

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type Target = SEXP

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.
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impl<'a> Copy for Root<'a>

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impl<'a> TrivialClone for Root<'a>

Auto Trait Implementations§

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impl<'a> Freeze for Root<'a>

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impl<'a> !RefUnwindSafe for Root<'a>

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impl<'a> !Send for Root<'a>

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impl<'a> !Sync for Root<'a>

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impl<'a> Unpin for Root<'a>

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impl<'a> UnsafeUnpin for Root<'a>

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impl<'a> !UnwindSafe for Root<'a>

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,

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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,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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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> RClone for T
where T: Clone,

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fn clone(&self) -> T

Create a deep copy of this value.
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impl<T> RCopy for T
where T: Copy,

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fn copy(&self) -> T

Create a bitwise copy of this value. Read more
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fn is_copy(&self) -> bool

Check if this type implements Copy. Read more
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impl<P, T> Receiver for P
where P: Deref<Target = T> + ?Sized, T: ?Sized,

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type Target = T

🔬This is a nightly-only experimental API. (arbitrary_self_types)
The target type on which the method may be called.
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impl<T> SizeEq<Cell<T>> for T
where T: ?Sized,

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type CastFrom = CastFromWrapper

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impl<T> SizeEq<ManuallyDrop<T>> for T
where T: ?Sized,

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type CastFrom = CastFromWrapper

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impl<T> SizeEq<MaybeUninit<T>> for T

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type CastFrom = CastSizedExact

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impl<T> SizeEq<ReadOnly<T>> for T
where T: ?Sized,

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type CastFrom = CastFromReadOnly

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

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type CastFrom = IdCast

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impl<T> SizeEq<Unalign<T>> for T

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type CastFrom = CastFromWrapper

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impl<T> SizeEq<UnsafeCell<T>> for T
where T: ?Sized,

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type CastFrom = CastFromWrapper

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impl<T> SizeEq<Wrapping<T>> for T

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type CastFrom = CastFromWrapper

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impl<T> SizedTypeProperties for T

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#[doc(hidden)]
const SIZE: usize = _

🔬This is a nightly-only experimental API. (sized_type_properties)
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#[doc(hidden)]
const ALIGN: usize = _

🔬This is a nightly-only experimental API. (sized_type_properties)
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#[doc(hidden)]
const ALIGNMENT: Alignment = _

🔬This is a nightly-only experimental API. (ptr_alignment_type)
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#[doc(hidden)]
const IS_ZST: bool = _

🔬This is a nightly-only experimental API. (sized_type_properties)
true if this type requires no storage. false if its size is greater than zero. Read more
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#[doc(hidden)]
const LAYOUT: Layout = _

🔬This is a nightly-only experimental API. (sized_type_properties)
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#[doc(hidden)]
const MAX_SLICE_LEN: usize = _

🔬This is a nightly-only experimental API. (sized_type_properties)
The largest safe length for a [Self]. Read more
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impl<T> ToOwned for T
where T: Clone,

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

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impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

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impl<T> InvariantsEq<ManuallyDrop<T>> for T
where T: ?Sized,

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

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impl<T> InvariantsEq<Unalign<T>> for T

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impl<T> InvariantsEq<Wrapping<T>> for T

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impl<Src, Dst, A, SV, DV, R> MutationCompatible<Src, A, SV, DV, (BecauseRead, R)> for Dst
where A: Aliasing, SV: Validity, DV: Validity, Src: Read<A, R> + ?Sized, Dst: Read<A, R> + ?Sized,

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impl<Src, Dst, A, SV, DV> MutationCompatible<Src, A, SV, DV, BecauseInvariantsEq> for Dst
where A: Aliasing, SV: Validity, DV: Validity, Src: TransmuteFrom<Dst, DV, SV> + ?Sized, Dst: TransmuteFrom<Src, SV, DV> + InvariantsEq<Src> + ?Sized,

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impl<T> Read<Exclusive, BecauseExclusive> for T
where T: ?Sized,

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impl<T> TransmuteFrom<Cell<T>, Valid, Valid> for T
where T: ?Sized,

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impl<T> TransmuteFrom<ManuallyDrop<T>, Valid, Valid> for T
where T: ?Sized,

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impl<T> TransmuteFrom<ReadOnly<T>, Valid, Valid> for T
where T: ?Sized,

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impl<Src, Dst> TransmuteFrom<Src, Initialized, Initialized> for Dst
where Src: ?Sized, Dst: ?Sized,

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impl<Src, Dst, V> TransmuteFrom<Src, V, Uninit> for Dst
where V: Validity, Src: ?Sized, Dst: ?Sized,

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impl<Src, Dst> TransmuteFrom<Src, Valid, Initialized> for Dst
where Src: IntoBytes + ?Sized, Dst: ?Sized,

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impl<T> TransmuteFrom<Unalign<T>, Valid, Valid> for T

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impl<T> TransmuteFrom<UnsafeCell<T>, Valid, Valid> for T
where T: ?Sized,

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impl<T> TransmuteFrom<Wrapping<T>, Valid, Valid> for T

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impl<Src, Dst, A, SV, DV, C, R> TransmuteFromPtr<Src, A, SV, DV, C, R> for Dst
where A: Aliasing, SV: Validity, DV: Validity, C: CastExact<Src, Dst>, Dst: TransmuteFrom<Src, SV, DV> + TryTransmuteFromPtr<Src, A, SV, DV, C, R> + ?Sized, Src: ?Sized,

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impl<Src, Dst, SV, DV, A, C, R> TryTransmuteFromPtr<Src, A, SV, DV, C, (BecauseMutationCompatible, R)> for Dst
where A: Aliasing, SV: Validity, DV: Validity, Src: TransmuteFrom<Dst, DV, SV> + ?Sized, Dst: MutationCompatible<Src, A, SV, DV, R> + ?Sized, C: CastExact<Src, Dst>,

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Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 8 bytes