Trait Step

pub trait Step: Sized {
    // Required methods
    fn next(&self) -> Option<Self>;
    fn next_by(&self, by: &Self) -> Option<Self>;
    fn prev(&self) -> Option<Self>;
    fn prev_by(&self, by: &Self) -> Option<Self>;
    fn steps_to(&self, value: &Self) -> Self;
}

Types that can be incremented or decremented by a unit value or a given value.

Required Methods

fn next(&self) -> Option<Self>

Return the next sequential value for the type

fn next_by(&self, by: &Self) -> Option<Self>

Return the value a given amount after the value

fn prev(&self) -> Option<Self>

Return the previous sequential value for the type

fn prev_by(&self, by: &Self) -> Option<Self>

Return the value a given amount before the value

fn steps_to(&self, value: &Self) -> Self

Return the steps to another value

The return value will be the number of steps between the two values (i.e. it will always be a positive number).

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 Step for i8

fn next(&self) -> Option<Self>

fn next_by(&self, by: &Self) -> Option<Self>

fn prev(&self) -> Option<Self>

fn prev_by(&self, by: &Self) -> Option<Self>

fn steps_to(&self, value: &Self) -> Self

impl Step for i16

fn next(&self) -> Option<Self>

fn next_by(&self, by: &Self) -> Option<Self>

fn prev(&self) -> Option<Self>

fn prev_by(&self, by: &Self) -> Option<Self>

fn steps_to(&self, value: &Self) -> Self

impl Step for i32

fn next(&self) -> Option<Self>

fn next_by(&self, by: &Self) -> Option<Self>

fn prev(&self) -> Option<Self>

fn prev_by(&self, by: &Self) -> Option<Self>

fn steps_to(&self, value: &Self) -> Self

impl Step for i64

fn next(&self) -> Option<Self>

fn next_by(&self, by: &Self) -> Option<Self>

fn prev(&self) -> Option<Self>

fn prev_by(&self, by: &Self) -> Option<Self>

fn steps_to(&self, value: &Self) -> Self

impl Step for isize

fn next(&self) -> Option<Self>

fn next_by(&self, by: &Self) -> Option<Self>

fn prev(&self) -> Option<Self>

fn prev_by(&self, by: &Self) -> Option<Self>

fn steps_to(&self, value: &Self) -> Self

impl Step for u8

fn next(&self) -> Option<Self>

fn next_by(&self, by: &Self) -> Option<Self>

fn prev(&self) -> Option<Self>

fn prev_by(&self, by: &Self) -> Option<Self>

fn steps_to(&self, value: &Self) -> Self

impl Step for u16

fn next(&self) -> Option<Self>

fn next_by(&self, by: &Self) -> Option<Self>

fn prev(&self) -> Option<Self>

fn prev_by(&self, by: &Self) -> Option<Self>

fn steps_to(&self, value: &Self) -> Self

impl Step for u32

fn next(&self) -> Option<Self>

fn next_by(&self, by: &Self) -> Option<Self>

fn prev(&self) -> Option<Self>

fn prev_by(&self, by: &Self) -> Option<Self>

fn steps_to(&self, value: &Self) -> Self

impl Step for u64

fn next(&self) -> Option<Self>

fn next_by(&self, by: &Self) -> Option<Self>

fn prev(&self) -> Option<Self>

fn prev_by(&self, by: &Self) -> Option<Self>

fn steps_to(&self, value: &Self) -> Self

impl Step for usize

fn next(&self) -> Option<Self>

fn next_by(&self, by: &Self) -> Option<Self>

fn prev(&self) -> Option<Self>

fn prev_by(&self, by: &Self) -> Option<Self>

fn steps_to(&self, value: &Self) -> Self

Implementors