Macro dot_generator::attr

macro_rules! attr {
    ($ik : ident $k : expr, $iv : ident $v : expr) => { ... };
    ($ik : ident $k : expr, $v : expr) => { ... };
    ($k : expr, $iv : ident $v : expr) => { ... };
    ($k : expr, $v : expr) => { ... };
}

represents an attribute in dot lang.

Example:

    fn attr_test() {
        use dot_generator::*;
        use dot_structures::*;

        assert_eq!(attr!("a","1"), Attribute(id!("a"), id!("1")));
        assert_eq!(attr!(html "a","1"), Attribute(id!(html "a"), id!("1")))
    }