thanks!

[D] FFI Works in CTFE

how so?
IIRC can't use functions without source code in CTFE in D (such as printf etc)

stdc is built into the D standard library, printf works fine.

D:
dmd -o- main.d

void main(){
  import core.stdc.stdio;
  enum s=printf("hello\n");
}

Error: printf cannot be interpreted at compile time, because it has no available source code

/cc @9898287 happy to merge once you address that point

Ah, I see what you mean.

merged but fixed that comment i mentioned in 3ee5760 ; thanks!