A tiny crate mimicking Elixir's pipe operator for Rust without macros.

Jonathan Kelley

Last update: Dec 6, 2022

Related tags

Miscellaneous pipette

Overview

Pipette

A small crate for using pipes in Rust.

use pipette::{Pipeline, pipe};

let input = 1;

let output = pipe((
    input
    |a| a * 2,
    |a| a * 3,
    |a| a * 4,
    |a| a * 5,
    |a| a * 6,
    |a| a * 7,
    |a| a * 8,
));

assert_eq!(output, 40_320);

Pipette is unique:

Supports polymorphic pipeline sizes
Integrates well with IDE
Does not require macros or custom traits

How to use Pipette

Pipette uses trait-based polymorphism (the Pipeline trait) to make it easy to assemble closure-based pipelines in Rust. A single pipeline may consist of up to 12 closures and does not require static typing (ie pipe3, pipe4, pipe5 etc.). Instead, the Pipeline trait will allow any tuple, calling compute any any size of pipeline.

fn add_one(a: i32) -> i32 {
    a + 1
}

let r0 = pipe((0, add_one, add_one));
let r1 = pipe((0, add_one, add_one, add_one));
let r2 = pipe((0, add_one, add_one, add_one, add_one));
let r3 = pipe((0, add_one, add_one, add_one, add_one, add_one));

// lazy pipeline
let add_three = (0, add_one, add_one, add_one);

add_three.compute();

License

This project is licensed under the MIT license.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in Pipette by you, shall be licensed as MIT, without any additional terms or conditions.

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Comments

why not use generic arrays?
thank you for great idea but I wonder why arrays are not used instead of tuple, does this implementation have an advantage? sample code :

pub fn pip<T, F, const N: usize>(init: T, funcs: [F; N]) -> T where F: FnOnce(T) -> T, { let mut r = init; for f in funcs { r = f(r) } r }
opened by robatipoor 1