Macro qecs_core::qecs_newtype

macro_rules! qecs_newtype {
    ($(#[$mmm:meta])* pub type $ty:ident: $base:ty) => { ... };
    ($(#[$mmm:meta])* type $ty:ident: $base:ty) => { ... };
    ($($(#[$mmm:meta])* pub type $ty:ident: $base:ty;)+) => { ... };
    ($($(#[$mmm:meta])* type $ty:ident: $base:ty;)+) => { ... };
    (@impl_traits; $ty:ident; $base:ty) => { ... };
}