Trait Index

pub trait Index:
    NativeType
    + AddAssign
    + Sub<Output = Self>
    + One
    + Num
    + CheckedAdd
    + PartialOrd
    + Ord {
    // Required methods
    fn to_usize(&self) -> usize;
    fn from_usize(index: usize) -> Option<Self>;
    fn from_as_usize(index: usize) -> Self;

    // Provided method
    fn range(start: usize, end: usize) -> Option<IndexRange<Self>> { ... }
}

Sealed trait describing the subset of NativeType (i32, i64, u32 and u64) that can be used to index a slot of an array.

Required Methods

fn to_usize(&self) -> usize

Convert itself to usize.

fn from_usize(index: usize) -> Option<Self>

Convert itself from usize.

fn from_as_usize(index: usize) -> Self

Convert itself from usize.

Provided Methods

fn range(start: usize, end: usize) -> Option<IndexRange<Self>>

An iterator from (inclusive) start to (exclusive) end.

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 Index for i8

fn to_usize(&self) -> usize

fn from_usize(value: usize) -> Option<Self>

fn from_as_usize(value: usize) -> Self

impl Index for i16

fn to_usize(&self) -> usize

fn from_usize(value: usize) -> Option<Self>

fn from_as_usize(value: usize) -> Self

impl Index for i32

fn to_usize(&self) -> usize

fn from_usize(value: usize) -> Option<Self>

fn from_as_usize(value: usize) -> Self

impl Index for i64

fn to_usize(&self) -> usize

fn from_usize(value: usize) -> Option<Self>

fn from_as_usize(value: usize) -> Self

impl Index for u8

fn to_usize(&self) -> usize

fn from_usize(value: usize) -> Option<Self>

fn from_as_usize(value: usize) -> Self

impl Index for u16

fn to_usize(&self) -> usize

fn from_usize(value: usize) -> Option<Self>

fn from_as_usize(value: usize) -> Self

impl Index for u32

fn to_usize(&self) -> usize

fn from_usize(value: usize) -> Option<Self>

fn from_as_usize(value: usize) -> Self

impl Index for u64

fn to_usize(&self) -> usize

fn from_usize(value: usize) -> Option<Self>

fn from_as_usize(value: usize) -> Self

Implementors