Trait SignedIndex 

pub trait SignedIndex:
    Seal
    + Debug
    + Neg<Output = Self>
    + Add<Output = Self>
    + Sub<Output = Self>
    + AddAssign
    + SubAssign
    + Pod
    + Eq
    + Ord
    + Send
    + Sync {
    const MAX: Self;

    // Required methods
    fn truncate(value: usize) -> Self;
    fn zx(self) -> usize;
    fn sx(self) -> usize;

    // Provided method
    fn sum_nonnegative(slice: &[Self]) -> Option<Self> { ... }
}

Trait for signed integers corresponding to the ones satisfying Index.

Always smaller than or equal to isize.

Required Associated Constants

const MAX: Self

Maximum representable value.

Required Methods

fn truncate(value: usize) -> Self

Truncate value to type Self.

fn zx(self) -> usize

Zero extend self.

fn sx(self) -> usize

Sign extend self.

Provided Methods

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

Sum nonnegative values while checking for overflow.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl SignedIndex for i32

Available on 32-bit or 64-bit or 128-bit only.

const MAX: Self = 2_147_483_647i32

fn truncate(value: usize) -> Self

fn zx(self) -> usize

fn sx(self) -> usize

impl SignedIndex for i64

Available on 64-bit or 128-bit only.

const MAX: Self = 9_223_372_036_854_775_807i64

fn truncate(value: usize) -> Self

fn zx(self) -> usize

fn sx(self) -> usize

impl SignedIndex for isize

const MAX: Self = 9_223_372_036_854_775_807isize

fn truncate(value: usize) -> Self

fn zx(self) -> usize

fn sx(self) -> usize

Implementors