Generator

generator is a toolchain-facing metaprogramming declaration: a generator module is invoked at compile time and injects members into target types according to its rules. It is meant for cases that auto-generate boilerplate; everyday business code never touches it.

Declaration Skeleton

generator module GenLib;
 
public generator Widget() target type
{
    generate() -> MemberList { /* called by the compiler; produces the member list */ }
}