Macro vec1

macro_rules! vec1 {
    () => { ... };
    ($first:expr $(, $item:expr)* , ) => { ... };
    ($first:expr $(, $item:expr)* ) => { ... };
}

A macro similar to vec! to create a Vec1.

If it is called with less then 1 element a compiler error is triggered (using compile_error to make sure you know what went wrong).