Trait IndexLike 

pub trait IndexLike:
    KeyLike
    + PartialOrd
    + Ord {
    // Required methods
    fn from_usize(value: usize) -> Self;
    fn to_usize(&self) -> usize;
    fn invalid() -> Self;

    // Provided methods
    fn decr(&mut self) { ... }
    fn incr(&mut self) { ... }
    fn is_valid(&self) -> bool { ... }
}

A trait for anything we use as a zero-based index.

Required Methods

fn from_usize(value: usize) -> Self

Convert a usize to the index.

fn to_usize(&self) -> usize

Convert the index to a usize.

fn invalid() -> Self

The invalid (maximal) value.

Provided Methods

fn decr(&mut self)

Decrement the value.

fn incr(&mut self)

Increment the value.

fn is_valid(&self) -> bool

Is a valid value (not the maximal value).

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.

Implementors

impl IndexLike for MessageIndex