anyinput: a macro for easier input of ArrayView1<T>

[CarlKCarlK]

Greetings,
I've just released anyinput , a crate that makes it easier to write functions that accept any string-, path-,iter-,array-, or 1-d ndarray-like thing. It is just syntactic sugar over the regular Rust syntax, but I hope that in some cases it is easier to remember and read.

Here is an example that shows how to apply ndarray functions such as mean to a Rust Vec<f32>.

use anyinput::anyinput;
use anyhow::Result;

#[anyinput]
fn any_mean(array: AnyNdArray<f32>) -> Result<f32, anyhow::Error> {
    if let Some(mean) = array.mean() {
        Ok(mean)
    } else {
        Err(anyhow::anyhow!("empty array"))
    }
}

// 'AnyNdArray' works with any 1-D array-like thing, but must be borrowed.
assert_eq!(any_mean(&vec![10.0, 20.0, 30.0, 40.0])?, 25.0);
assert_eq!(any_mean(&ndarray::array![10.0, 20.0, 30.0, 40.0])?, 25.0);

Behind the scenes, it is defining a generic type and a lifetime -- syntax you could write yourself but I find hard to remember.

• Carl