pub trait Step: PartialOrd<Self> {
fn step(&self, by: &Self) -> Option<Self>;
fn steps_between(start: &Self, end: &Self, by: &Self) -> Option<usize>;
fn steps_between_by_one(start: &Self, end: &Self) -> Option<usize>;
fn is_negative(&self) -> bool;
fn replace_one(&mut self) -> Self;
fn replace_zero(&mut self) -> Self;
fn add_one(&self) -> Self;
fn sub_one(&self) -> Self;
}
Objects that can be stepped over in both directions.
The steps_between function provides a way to efficiently compare two Step objects.
fn step(&self, by: &Self) -> Option<Self>Steps self if possible.
fn steps_between(start: &Self, end: &Self, by: &Self) -> Option<usize>Returns the number of steps between two step objects. The count is inclusive of start and exclusive of end.
Returns None if it is not possible to calculate steps_between without overflow.
fn steps_between_by_one(start: &Self, end: &Self) -> Option<usize>Same as steps_between, but with a by of 1
fn is_negative(&self) -> boolTests whether this step is negative or not (going backwards)
fn replace_one(&mut self) -> SelfReplaces this step with 1, returning itself
fn replace_zero(&mut self) -> SelfReplaces this step with 0, returning itself
fn add_one(&self) -> SelfAdds one to this step, returning the result
fn sub_one(&self) -> SelfSubtracts one to this step, returning the result
impl Step for usizeimpl Step for u8impl Step for u16impl Step for u32impl Step for isizeimpl Step for i8impl Step for i16impl Step for i32impl Step for u64impl Step for i64impl Step for u128impl Step for i128
© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/iter/trait.Step.html