extendr_api::prelude::utils::constrained

Struct Idx

#[repr(transparent)]
pub struct Idx<'n, I>(Branded<'n, I>);
Expand description

I value smaller than the size corresponding to the lifetime 'n.

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§0: Branded<'n, I>

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impl<'n> Idx<'n, usize>

pub fn truncate<I>(self) -> Idx<'n, I>
where I: Index,

Truncate self to a smaller type I.

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impl<'n, I> Idx<'n, I>
where I: Index,

pub fn new_checked(idx: I, size: Size<'n>) -> Idx<'n, I>

Returns a new index after asserting that it’s bounded by size.

pub unsafe fn new_unchecked(idx: I, size: Size<'n>) -> Idx<'n, I>

Returns a new index without asserting that it’s bounded by size.

pub unsafe fn new_raw_unchecked(idx: I) -> Idx<'n, I>

Returns a new index without asserting that it’s bounded by the value tied to the lifetime 'n.

pub fn into_inner(self) -> I

Returns the unconstrained value.

pub fn zx(self) -> Idx<'n, usize>

Zero extend the value.

pub fn sx(self) -> !

Unimplemented: Sign extend the value.

pub fn to_inclusive(self) -> IdxInclusive<'n, I>

Returns the index, bounded inclusively by the value tied to 'n.

pub fn next(self) -> IdxInclusive<'n, I>

Returns the next index, bounded inclusively by the value tied to 'n.

pub fn from_slice_mut_checked<'a>( slice: &'a mut [I], size: Size<'n>, ) -> &'a mut [Idx<'n, I>]

Assert that the values of slice are all bounded by size.

pub unsafe fn from_slice_mut_unchecked<'a>( slice: &'a mut [I], ) -> &'a mut [Idx<'n, I>]

Assume that the values of slice are all bounded by the value tied to 'n.

pub fn from_slice_ref_checked<'a>( slice: &'a [I], size: Size<'n>, ) -> &'a [Idx<'n, I>]

Assert that the values of slice are all bounded by size.

pub unsafe fn from_slice_ref_unchecked<'a>(slice: &'a [I]) -> &'a [Idx<'n, I>]

Assume that the values of slice are all bounded by the value tied to 'n.

Trait Implementations§

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impl<'n, I> Clone for Idx<'n, I>
where I: Clone,

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fn clone(&self) -> Idx<'n, I>

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<I> Debug for Idx<'_, I>
where I: Debug,

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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<I> Deref for Idx<'_, I>

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type Target = I

The resulting type after dereferencing.
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fn deref(&self) -> &<Idx<'_, I> as Deref>::Target

Dereferences the value.
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impl<'n, T> Index<Idx<'n, usize>> for Array<'n, T>

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type Output = T

The returned type after indexing.
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fn index( &self, idx: Idx<'n, usize>, ) -> &<Array<'n, T> as Index<Idx<'n, usize>>>::Output

Performs the indexing (container[index]) operation. Read more
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impl<'n, T> IndexMut<Idx<'n, usize>> for Array<'n, T>

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fn index_mut( &mut self, idx: Idx<'n, usize>, ) -> &mut <Array<'n, T> as Index<Idx<'n, usize>>>::Output

Performs the mutable indexing (container[index]) operation. Read more
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impl<'n, I> Ord for Idx<'n, I>
where I: Ord,

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fn cmp(&self, other: &Idx<'n, I>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · Source§

fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized,

Restrict a value to a certain interval. Read more
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impl<'n, I> PartialEq for Idx<'n, I>
where I: PartialEq,

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fn eq(&self, other: &Idx<'n, I>) -> 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<'n, I> PartialOrd for Idx<'n, I>
where I: PartialOrd,

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fn partial_cmp(&self, other: &Idx<'n, I>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl<'n, I> Copy for Idx<'n, I>
where I: Copy,

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impl<'n, I> Eq for Idx<'n, I>
where I: Eq,

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impl<'n, I> StructuralPartialEq for Idx<'n, I>

Auto Trait Implementations§

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impl<'n, I> Freeze for Idx<'n, I>
where I: Freeze,

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impl<'n, I> RefUnwindSafe for Idx<'n, I>
where I: RefUnwindSafe,

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impl<'n, I> Send for Idx<'n, I>
where I: Send,

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impl<'n, I> Sync for Idx<'n, I>
where I: Sync,

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impl<'n, I> Unpin for Idx<'n, I>
where I: Unpin,

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impl<'n, I> UnwindSafe for Idx<'n, I>
where I: UnwindSafe,

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,