Template instance does not match template declaration

[Sergey]

On Friday, 15 August 2025 at 12:02:19 UTC, Marc wrote:
> Hello,
> I'm trying to declare a templated member function that takes a 
> value of size_t N. A simple example to reproduce what Im trying 
> to do is the following:
>
> ```d
> import std.stdio;
> void getCol(N: size_t)() {
>    return N;
> }
>
> void main() {
>    // Call
>    writeln(getCol!0());
> }
> ```
> I get the following error: `Error: template instance `getCol!0` 
> does not match template declaration `getCol(N : ulong)()`
>    writeln(getCol!0());
>            ^
> Error dmd failed with exit code 1.`
>
> Can anyone please help me getting it to work?

D doesn't use ":" for types
```d
import std;

size_t getCol(size_t N)() {
    return N;
}

void main() {
    // Call
    writeln(getCol!0());
}
```