Setting field of struct object

[Joel]

On Monday, 22 January 2024 at 08:27:36 UTC, Joel wrote:
> I've been watching a video (YouTube - "Pipeline-oriented 
> programming - Scott Wlaschin - NDC Porto 2023") with something 
> like the following code. This only sets the first method call, 
> so I'm wanting to know how to make this work, for the 
> subsequent methods.
>
> ```d
> import std;
>
> struct Person {
>     string name, email;
>     ulong age;
>     auto withName(string name) { this.name=name; return this; }
>     auto withEmail(string email) { this.email=email; return 
> this; }
>     auto withAge(ulong age) { this.age=age; return this; }
> }
>
> void main() {
>     Person p;
>     
> p.withName("Tom").withEmail("joelcnz at gmail.com").withAge(44);
>     writeln(p);
> }
> ```

I've lost interest in the video, looks like horrible syntax (F#).