Is it possible to do this with a template?

[rempas]

On Friday, 17 December 2021 at 08:44:39 UTC, Mitacha wrote:
>
> It isn't really about limitation of templates. You're trying to 
> use mixin template and it's main purpose is to inject 
> declarations. If you want to replace `is expression` with 
> template you could use something like this:
>
> ```d
> bool is_same(alias value, T)() {
>     return is(typeof(value) == T);
>     }
>
> void main() {
>     int value = 10;
>     static if (is_same!(value, int)) {
>         writeln("it is true!");
>     } else {
>         writeln("it is false!");
>     }
> }
> ```

Oh! That's nice! I didn't even knew it was possible to create 
template functions like this! Thanks!

> Personally, I don't see any benefit with replacing that kind of 
> `is expressions` with templates. Perhaps I'm missing something 
> :)

The benefits are typing less code and make it more readable and 
easy on the eyes ;)