On Tue, 21 Jan 2014 08:59:28 GMT, Kai-Heng Feng wrote:
I came from C++ world,
I assumed that since Json is a struct, it should be default-initialized.
But in D world, struct is initialized by a factory function, am I right?
It is indeed default initialized (in contrast to C++, all values are default initialized in D unless = void; is used, not only struct types), but the default in this case was chosen to be Json.Type.undefined.
Another possibility to handle this transparently would be to let a member assignment such as j.id = ...; automatically set the type of j to object, but when initially writing this, I wanted to start with a rather strongly typed interface and evaluate more relaxed features later (because it's always easy to relax such restrictions, but not the other way around).