Re: Is there a way to make a function parameter accept only values that can be checked at compile time?

[max haughton via Digitalmars-d-learn]

On Tuesday, 28 December 2021 at 21:19:29 UTC, rempas wrote:
I would like to know if that's possible. Actually I would like 
to do something like the following:

```
extern (C) void main() {
  void print_num(int num, comp_time_type int mul) {
    static if (is(mul == ten)) {
      printf("%d\n", num * 10);
    } else static if (is(mul == three)) {
      printf("%d\n", num * 3);
    } else {
      printf("%d\n", num);
    }
  }

  int multi = 211;
  print_num(10, 3);     // Ok, accept this
  print_num(10, multi); // Error, do not accept this
}
```

So I want to have "mul" only accept values that can be 
calculate at compile time so I can use it with things like 
"static if". Is this possible?

Why do you need this? What's wrong with a normal branch in this 
case.