Concerns about struct initialization

[Johannes Loher]

On Saturday, 22 December 2018 at 08:53:20 UTC, Dru wrote:
> 1)
> would like to override default copy initialization

In order to do this, you need to use a postblit 
(https://dlang.org/spec/struct.html#struct-postblit):

```
struct A {
     this(this) {
         writeln("postblit called");
     }
}

void main() {
     A a;
     A b = a; // prints "postblit called"
}
```

See also DIP1018 
(https://github.com/dlang/DIPs/blob/07da1f2cabc8b1bc3ad66034598a133e5ad13356/DIPs/DIP1018.md) which proposes that we switch to regular copy constructors for this.