Trait extendr_api::prelude::sparse::Index

pub trait Index:
    Seal
    + Debug
    + Not<Output = Self>
    + Add<Output = Self>
    + Sub<Output = Self>
    + AddAssign
    + SubAssign
    + Pod
    + Eq
    + Ord
    + Send
    + Sync {
    type FixedWidth: Index;
    type Signed: SignedIndex;

    // Provided methods
    fn truncate(value: usize) -> Self { ... }
    fn zx(self) -> usize { ... }
    fn canonicalize(slice: &[Self]) -> &[Self::FixedWidth] { ... }
    fn canonicalize_mut(slice: &mut [Self]) -> &mut [Self::FixedWidth] { ... }
    fn from_signed(value: Self::Signed) -> Self { ... }
    fn to_signed(self) -> Self::Signed { ... }
    fn sum_nonnegative(slice: &[Self]) -> Option<Self> { ... }
}

Trait for unsigned integers that can be indexed with.

Always smaller than or equal to usize.

Required Associated Types

type FixedWidth: Index

Equally-sized index type with a fixed size (no usize).

type Signed: SignedIndex

Equally-sized signed index type.

Provided Methods

fn truncate(value: usize) -> Self

Truncate value to type Self.

fn zx(self) -> usize

Zero extend self.

fn canonicalize(slice: &[Self]) -> &[Self::FixedWidth]

Convert a reference to a slice of Self to fixed width types.

fn canonicalize_mut(slice: &mut [Self]) -> &mut [Self::FixedWidth]

Convert a mutable reference to a slice of Self to fixed width types.

fn from_signed(value: Self::Signed) -> Self

Convert a signed value to an unsigned one.

fn to_signed(self) -> Self::Signed

Convert an unsigned value to a signed one.

fn sum_nonnegative(slice: &[Self]) -> Option<Self>

Sum values while checking for overflow.

Object Safety

This trait is not object safe.

Implementations on Foreign Types

impl Index for u32

type FixedWidth = u32

type Signed = i32

impl Index for u64

type FixedWidth = u64

type Signed = i64

impl Index for usize

type FixedWidth = u64

type Signed = isize

Implementors