# collections of useful macros
## example
```rust
use useful_macro::macros::*;
let arg = args!();
println!("{:?}",arg);
let s = input!();
println!("{:?}",s);
let p = powf!(2.,2.);
println!("{:?}",p);
let s = split_to_vec!("aa.bb",".");
println!("{:?}",s);
```