Count macro

A macro to allow for compile time counting

How to use this

Every instance of _int_ will be replaced with either a literal or an ident.

count_macro::count will panic in debug mode if counter exceeds usize. If you wish to wrap to 0, please use count_macro::wrapping_count.

Ident to Literal

```rust

use count_macro::count;

let a = count!(vec![int, int, int]); assert_eq!(a, vec![0, 1, 2]);

```

Ident to ident

```rust

use count_macro::count;

count! { let aint = "Hello"; let aint = "World"; }

asserteq!(a0, "Hello"); asserteq!(a1, "World");

```

In macro

```rust

use count_macro::count;

macrorules! mymacro { ($($v:expr),*) => { count!{ $( let _ = $v; // Ignoring $v

            println!("{}", _int_);
        )*
    }
};

}

my_macro!('@', '@', '@', '@'); // Will print from 0 to 3

```