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>

Implementations§

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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.

Trait Implementations§

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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> Copy for Root<'a>

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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> TrivialClone for Root<'a>

Auto Trait Implementations§

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impl<'a> UnsafeUnpin 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 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> SizeHint for T
where T: ?Sized,

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default fn lower_bound(&self) -> usize

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

Returns a lower bound on the number of elements this container-like item contains. For example, an array [u8; 12] could return any value between 0 and 12 inclusively as a correct implementation. Read more

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default fn upper_bound(&self) -> Option<usize>

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

Returns an upper bound on the number of elements this container-like item contains if it can be determined, otherwise None. Read more

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final fn size_hint(&self) -> (usize, Option<usize>)

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

Returns an estimate for the number of elements this container like type contains. Read more

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