How would you create this construct?

[Chris Katko]

On Friday, 30 March 2018 at 03:14:42 UTC, Mike Parker wrote:
> On Friday, 30 March 2018 at 02:30:01 UTC, Chris Katko wrote:
>> [...]
>
> Something like this?
>
> =============
> import std.stdio;
>
> [...]

This is beautiful. I mean, the struct stuff looks 
complicated/non-intuitive at first, but it's all boilerplate.