Could someone please explain what is wrong with this code?
https://glot.io/snippets/fwxn2198kv
```d
import std.stdio;
struct Sample{
void function() func1;
void function() func2;
}
void noth(Sample smpl)() {
smpl.func1(); // Error: expression __lambda1 is not a valid
template value argument
smpl.func2(); // Error: expression __lambda2 is not a valid
template value argument
}
void main(){
enum s = Sample(
{writeln("Hello world1");},
{writeln("Hello world2");}
);
s.func1();
s.func2();
noth!(s)();
}
```
