Macro cargo_what::what

macro_rules! what {
    ($($args:expr),* $(,)*) => { ... };
}

This is the core what! macro.

It behaves similarly to todo!, passes all type-checks, and panics if executed.

fn hello() -> Result<(), Box<dyn Error>> {
    what!()
}

One difference from todo! is that what! also accepts arbitrary arguments, which can help reduce "unused variable" noise.

fn hello(a: usize, b: usize) -> usize {
    let c = a..b;
    what!(a, b, c)
}

See the crate-level documentation for more info on how you can show the type-info of what!s in a program.