Template: get function name

[novice3]

Hello.
I have wrapping Windows API functions, wich return 0 on success 
and erroro code on failure.

I copy wenforce template as:
```
private T denforce(T, S)(T value, lazy S msg = null, string file 
= __FILE__, size_t line = __LINE__)
{
   import core.sys.windows.winerror: NO_ERROR;
   import std.conv: to;
   if (value != NO_ERROR)
     throw new WindowsException(value, to!string(msg), file, line);
   return value;
}
```

and use it:
```
DhcpEnumServers(0, null, servers, null, 
null).denforce("DhcpEnumServers");
````

Then windows api - extern (Windows)DhcpEnumServers - return 
error, then Windows exception throwed with name of failed api 
"DhcpEnumServers".

Can we change template to avoid api name dublicate?
Can denforce template obtain "DhcpEnumServers" function name to 
format message "DhcpEnumServers api failed"?

Thanks.