kvfmt

A helper macro for stringifying variables into a key=value style string

1 unstable release

0.1.5 Dec 10, 2019

MIT/Apache

5KB

kvfmt="valuable"

Latest Version Rust Documentation

This library provides a convenient macro generating structured logging-esque strings with a minimalistic syntax.

[dependencies]
kvfmt = "0.1"

Example

use kvfmt::kvfmt;

fn main() {
    let dir = "/var/log";
    let paths = vec!["dmesg", "syslog"];

    assert_eq!(
        "dir=/var/log paths=[\"dmesg\", \"syslog\"]",
        kvfmt!(dir, ?paths)
    );
}

Details

  • This macro supports any number of identifiers, optionally prefixed with a ? to indicate that it should be formatted with the Debug trait rather than the Display trait which is the default.
    • kvfmt!(dir)format!("dir={}", dir)
    • kvfmt!(?dir)format!("dir={:?}", dir)

License

Licensed under either of Apache License, Version 2.0 or MIT license at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this crate by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

Credits

A special thanks to Nika for helping me write the macro and David whose wonderful README style I continously steal for all of my projects.

No runtime deps