Unhygienic2

A dead simple macro to erase macro hygiene. This stringifies the input, then reparses it in the caller's context.

First [unhygienic] based on [procmacrohack]. Since 1.45 Rust have native support #[procmacro]. Therefore, procmacro_hack isn't neeeded.

Example

```rust use unhygienic2::unhygienic;

macro_rules! declare { ($exp:expr) => { unhygienic! { fn func() -> i32 { let a = 5;

            $exp
        }
    }
}

}

declare!({ a + 1 });

fn main() { assert_eq!(func(), 6); } ```