On Tuesday, 16 December 2025 at 20:56:06 UTC, Richard (Rikki)
Andrew Cattermole wrote:
On 17/12/2025 9:48 AM, DLearner wrote:
I have a rather complicated string mixin defined and invoked
from within the same source file.
Which seems to work.
But when I move the mixin definition to a separate module, and
import that module into the original source file, the
compilation collapses complaining that array concatenation
requires the GC, which is not available with -betterC.
[...]
string genStuff(string val) {
return val ~ ";";
}
void myFunc() {
mixin(genStuff("this"));
}
```
This won't work without a way to mark `genStuff` as CTFE only.
Which doesn't exist currently.
Compiler has to know that a given execution context is CTFE
only otherwise disallowed.
1. Any proposals to mark a function as CTFE only?
2. Why (and I've now got this down to a cut-and-paste) is there
no problem if the mixin definition is in the main function, but
problem appears if the definition is moved to a separate module
(which is imported into the main function)?
DL
