Macro regexify 

macro_rules! regexify {
    ($name : ident {
        $($field : ident, $field_type : ty, $pattern : expr)*
    }) => { ... };
}

Create a struct with regex patterns and implements RegexStruct trait on it.

 regexify! ( Details {
 name, String, r"\w+"
 _w, String, r"\s+"
 age, i32, r"\d+"
 });