Mixin and compile-time functions for code generation

[Cecil Ward]

I have a function that can be run at compile-time and which will 
be able to output code to be injected into the D source code 
stream. Can I get mixin whatever to do this for me? Mixin with a 
function that runs at compile-time and creates the required 
source ? Like D’s solution for a replacement for function-style C 
preprocessor macros ? - but far more advanced and capable ?

I need to re-read Ali Çehreli’s excellent book for the third time.