Struct extendr_api::prelude::Slice

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pub struct Slice {
    pub start: isize,
    pub end: Option<isize>,
    pub step: isize,
}
Expand description

A slice (range with step size).

end is an exclusive index. Negative start or end indexes are counted from the back of the axis. If end is None, the slice extends to the end of the axis.

See also the s![] macro.

§Examples

Slice::new(0, None, 1) is the full range of an axis. It can also be created with Slice::from(..). The Python equivalent is [:].

Slice::new(a, b, 2) is every second element from a until b. It can also be created with Slice::from(a..b).step_by(2). The Python equivalent is [a:b:2].

Slice::new(a, None, -1) is every element, from a until the end, in reverse order. It can also be created with Slice::from(a..).step_by(-1). The Python equivalent is [a::-1].

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§start: isize

start index; negative are counted from the back of the axis

§end: Option<isize>

end index; negative are counted from the back of the axis; when not present the default is the full length of the axis.

§step: isize

step size in elements; the default is 1, for every element.

Implementations§

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impl Slice

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pub fn new(start: isize, end: Option<isize>, step: isize) -> Slice

Create a new Slice with the given extents.

See also the From impls, converting from ranges; for example Slice::from(i..) or Slice::from(j..k).

step must be nonzero. (This method checks with a debug assertion that step is not zero.)

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pub fn step_by(self, step: isize) -> Slice

Create a new Slice with the given step size (multiplied with the previous step size).

step must be nonzero. (This method checks with a debug assertion that step is not zero.)

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impl Clone for Slice

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fn clone(&self) -> Slice

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Slice

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl From<Range<i32>> for Slice

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fn from(r: Range<i32>) -> Slice

Converts to this type from the input type.
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impl From<Range<isize>> for Slice

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fn from(r: Range<isize>) -> Slice

Converts to this type from the input type.
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impl From<Range<usize>> for Slice

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fn from(r: Range<usize>) -> Slice

Converts to this type from the input type.
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impl From<RangeFrom<i32>> for Slice

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fn from(r: RangeFrom<i32>) -> Slice

Converts to this type from the input type.
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impl From<RangeFrom<isize>> for Slice

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fn from(r: RangeFrom<isize>) -> Slice

Converts to this type from the input type.
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impl From<RangeFrom<usize>> for Slice

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fn from(r: RangeFrom<usize>) -> Slice

Converts to this type from the input type.
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impl From<RangeFull> for Slice

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fn from(_: RangeFull) -> Slice

Converts to this type from the input type.
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impl From<RangeInclusive<i32>> for Slice

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fn from(r: RangeInclusive<i32>) -> Slice

Converts to this type from the input type.
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impl From<RangeInclusive<isize>> for Slice

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fn from(r: RangeInclusive<isize>) -> Slice

Converts to this type from the input type.
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impl From<RangeInclusive<usize>> for Slice

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fn from(r: RangeInclusive<usize>) -> Slice

Converts to this type from the input type.
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impl From<RangeTo<i32>> for Slice

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fn from(r: RangeTo<i32>) -> Slice

Converts to this type from the input type.
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impl From<RangeTo<isize>> for Slice

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fn from(r: RangeTo<isize>) -> Slice

Converts to this type from the input type.
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impl From<RangeTo<usize>> for Slice

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fn from(r: RangeTo<usize>) -> Slice

Converts to this type from the input type.
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impl From<RangeToInclusive<i32>> for Slice

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fn from(r: RangeToInclusive<i32>) -> Slice

Converts to this type from the input type.
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impl From<RangeToInclusive<isize>> for Slice

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fn from(r: RangeToInclusive<isize>) -> Slice

Converts to this type from the input type.
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impl From<RangeToInclusive<usize>> for Slice

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fn from(r: RangeToInclusive<usize>) -> Slice

Converts to this type from the input type.
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impl From<Slice> for SliceInfoElem

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fn from(s: Slice) -> SliceInfoElem

Converts to this type from the input type.
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impl Hash for Slice

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fn hash<__H>(&self, state: &mut __H)
where __H: Hasher,

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for Slice

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fn eq(&self, other: &Slice) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for Slice

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impl Eq for Slice

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impl StructuralPartialEq for Slice

Auto Trait Implementations§

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impl Freeze for Slice

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impl RefUnwindSafe for Slice

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impl Send for Slice

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impl Sync for Slice

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impl Unpin for Slice

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impl UnwindSafe for Slice

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, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. 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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. 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<T> Boilerplate for T
where T: Copy + Send + Sync + Debug + PartialEq + 'static,