Couldn't we use mixins in run-time?

[Kagamin]

On Wednesday, 21 April 2021 at 07:50:35 UTC, rempas wrote:
> I'm really wondering, what stops us about using mixins in 
> run-time? I'm really interested on learning how they work. For 
> my understating, the write the code for use in compile-time and 
> then the whole things is compiled. However, I'm really 
> wondering what stops us for writing the code and compiling it 
> at run-time like it's an interpreter.

rdmd does that, runs a program from source.