Proof of concept for v2 - NO duplication, NO `static if` hell, NO difficulty with interoperability

[user1234]

On Sunday, 31 October 2021 at 01:59:38 UTC, Andrei Alexandrescu 
wrote:
> https://github.com/dlang/phobos/pull/8309
>
> Destroy!

Two questions, probably related to `canon`. I assume that two 
things are possible but I dont see how:

1. How does the module identifier part `v1` binds a current 
module name ?
For example the fact that `import std.v1.file` is the same as 
`import std.file`.

2. How does `v2` without actual `v2` module binds `v1` ?
For example `import std.v2.file` is the same as `import 
std.v1.file`, despite of no physical `std.v2.file` file (to pull 
v1).