![Latest Version] ![Rustc Version nightly]

Provides truly zero-cost alternatives to Iterator::step_by for both incrementing and decrementing any type that satisfies RangeBounds<T: Copy + Default + Step>.

The assembly code generated for the two trait methods this crate implements, inc_by and dec_by, should in the overwhelming majority of cases be nearly or completely identical to the assembly code that would be generated for an incrementing "step"-based while loop or decrementing "step"-based while loop, respectively. If you come across a scenario where it is not, please feel free to open an issue about it.

Minimum supported Rust version: this is a nightly-only crate at the moment due to the use of the Step trait, which has not yet been stabilized.

#![no_std] compatibility: this crate is fully #![no_std] compatible by default.

A basic usage example:

```rust use staticstep::*;

// Apart from aiming to provide a properly-optimized Rust equivalent to the sort of C-style for-loop // that ends in i += number or i -= number as opposed to i++ or i--, this crate also aims to // (and does) support backwards ranges in a meaningful way that's logically equivalent to how // forwards ranges are generally dealt with in Rust.

fn main() { // Exclusive, so 48 is the last number printed. for i in (0..64).inc_by::<16>() { print!("{} ", i); } println!("");

// Inclusive, so 64 is the last number printed. for i in (0..=64).inc_by::<16>() { print!("{} ", i); } println!("");

// Exclusive, so 16 is the last number printed. for i in (64..0).dec_by::<16>() { print!("{} ", i); } println!("");

// Inclusive, so 0 is the last number printed. for i in (64..=0).dec_by::<16>() { print!("{} ", i); }

// Note that inc_by will always immediately return None if given a reverse range, while // dec_by will always immediately return None if given a "normal" forwards range. } ```

License:

Licensed under either the MIT license or version 2.0 of the Apache License. Your choice as to which! Any source code contributions will be dual-licensed in the same fashion.