#conditional #assignment #lazy-evaluation

no-std conditional-assignment

This is a very simple, small crate to help make conditional assignments more ergonomic

2 unstable releases

0.2.0 Dec 30, 2023
0.1.0 Dec 25, 2023

#377 in No standard library

MIT/Apache

7KB

conditional-assignment

GitHub Workflow Status (with branch) Crates.io Crates.io (latest)

This is a very simple, small crate to help make conditional assignments more ergonomic.

Intent

The goal is to make the below look a little better.

let condition = 0 < 1;
let outcome = if condition {
    "true"
} else {
    "false"
};

Examples

Basic

Eager

use conditional_assignment::Pick;

let condition = 0 < 1;
let outcome = condition.pick("true", "false");

Lazy

use conditional_assignment::Pick;

let condition = 0 < 1;
let outcome = condition.pick_lazy(
    || {
        // This won't be evaluated and
        // panic when condition is false.
        assert!(condition);
        "true"
    },
    || {
        // This won't be evaluated and
        // panic when condition is true.
        assert!(!condition);
        "false"
    },
);

Minimum Supported Rust Version (MSRV)

According to cargo-msrv, the MSRV is 1.56.1. Given how simple this crate is, I wouldn't be surprised if the MSRV is lower, but I didn't check. Try it!

License

Licensed under either of

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

No runtime deps