a rust macro for asserting 2 numbers are approximately equal

This crate exports a macro for asserting that two numbers are approximately equal (1.0e-6, by default) to each other.

On panic, this macro will print the values of the expressions with their debug representations. You can optionally add an optional diff value. If you don't supply a diff value as an argument, 1.0e-6 is the default used.

To use this crate, add assert_approx_eq as a dependency of your Rust project.

Then, you can use the macro as follows:

use assert_approx_eq::assert_approx_eq;

let a = 3f64;
let b = 4f64;

assert_approx_eq!(a, b); // panics
assert_approx_eq!(a, b, 2f64); //does not panic
assert_approx_eq!(a, b, 1e-3f64); // panics

You can read documentation for how to use this crate on docs.rs or view the example.

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

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.