arr_ty

Macros for smart array initialization (best for trait object element types).

The author of this crate is not good at English.
Forgive me if the document is hard to read.

What is this?

This crate makes it a little bit smarter about initializing arrays whose element type is a trait object (just the author's personal feeling...).

let arr = arr_ty!(Box<dyn Any>; [
    Box::new(0),
    Box::new(false),
    Box::new("false")
]);

Without this crate, as far as the author knows, Rust (1.68.2) as of 2023 has the following unsmart code.

• Redundant...

let arr = [
    Box::new(0) as Box<dyn Any>,
    Box::new(false) as Box<dyn Any>,
    Box::new("false") as Box<dyn Any>
];

• Or no unity...

let arr = [
    Box::new(0) as Box<dyn Any>,
    Box::new(false),
    Box::new("false")
];

• Or manual counting...

let arr: [Box<dyn Any>; 3] = [
    Box::new(0),
    Box::new(false),
    Box::new("false")
];