Lazydeed — a tiny crate that turns functions into lazy tasks

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A tiny crate that turns functions into lazy tasks.

Defer any function call — sync or async — until you're ready to run it. One attribute, and a task becomes just a value.

The idea is easy to grasp if you know async — the mechanics are very similar. The #[task] attribute rewrites the function so the call only captures the arguments and returns a task, while the function body is moved into run and executes there.

sync function → Task, run returns the value
async function → AsyncTask, run returns a Send future

Quick Start

use lazydeed::*;

#[task]
fn sum(x: i32, y: i32) -> i32 {
    x + y
}

let task = sum(1, 2); // nothing runs yet
// In this case, the function will be called and will output the number 3.
println!("{}", task.run());

Async works the same way: mark the function async, get an AsyncTask, and run returns a Send future to await on your own runtime.

Methods are not supported yet.

GitHub: GitHub - Honami333/Lazydeed: A tiny Rust crate that turns functions into lazy tasks: nothing runs until run() · GitHub
Crates.io: crates.io: Rust Package Registry
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Glad for any feedback and ideas.