How can we call a func template instance using the Mars vendor already ?

[monkyyy]

On Thursday, 19 February 2026 at 15:37:42 UTC, user1234 wrote:
> Not very important but I'd like to know if it's possible... so 
> try this with DMD
>
> ```d
> module runnable;
>
> // The OK part
> int ok1(){return 1;}
> int ok2(){return 2;}
>
> void OK()
> {
>     ulong r;
>     asm
>     {
>         xor R8, R8;
>         call ok1;
>         add R8, RAX;
>         call ok2;
>         add R8, RAX;
>         mov r, R8;
>     }
>     assert(r == 3);
> }
>
> // The NG part
> int ng(int i)() => i;
> static foreach (i; 1..3)
>     alias T = ng!i;
>
> void NG()
> {
>     ulong r;
>     asm
>     {
>         xor R8, R8;
>         call _D8runnable__T2ngVii1ZQiFNaNbNiNfZi;
>         add R8, RAX;
>         call _D8runnable__T7ngVii2ZQnFNaNbNiNfZi;
>         add R8, RAX;
>         mov r, R8;
>     }
>     assert(r == 3);
> }
>
> int main()
> {
>     OK();
>     NG();
>     return 0;
> }
> ```
>
> so you'll get
>
>> Error: function `runnable.NG` label 
>> `_D8runnable__T2ngVii1ZQiFNaNbNiNfZi` is undefined
>> Error: function `runnable.NG` label 
>> `_D8runnable__T7ngVii2ZQnFNaNbNiNfZi` is undefined
>
> So to keep things simples the idea is to provide a valid 
> function identifier in the asm. I've used compiler explorer to 
> get the __valid__ mangled version 
> (https://godbolt.org/z/WYMqMhnWG). No luck.
>
> Is that even possible ?

I never had any luck meta programming asm blocks; I believe your 
best option is to mixin the whole block, in which case you cant 
call templates and I dont think mangled names is the right 
syntax. I believe youd have to give it a simple local name then 
call that `alias F1=ng!1;` `call F1;`

looking at my hotreload gist I got this sort of thing working:

```d
// The NG part
int ng(int i)(){return i;}
static foreach (i; 1..3)
     alias T = ng!i;
import std;
import core.stdc.stdlib;
import core.sys.posix.dlfcn;
void NG()
{
     auto 
f=cast(typeof(&ok1))dlsym(null,ng!2.mangleof);//"_D8runnable__T2ngVii1ZQiFNaNbNiNfZi");
     f().writeln;
}
```

Id suggest trying to go this direction 
https://gist.github.com/crazymonkyyy/e6edc498376da0501c851c8c339eba4b