0 cost template instantiation

[jfondren]

On Thursday, 30 September 2021 at 01:09:47 UTC, Hipreme wrote:
> I have a template function that all it does is given a symbol, 
> it loads a dll for its type + its name:
>
> ```
> void loadSymbol(alias s, string symName = "")()
> {
> 	static if(symName == "")
> 		s = cast(typeof(s))_loadSymbol(_dll, (s.stringof~"\0").ptr);
> 	else
> 		s = cast(typeof(s))_loadSymbol(_dll, (symName~"\0").ptr);
> }
> ```

If symName is always a string literal, then you don't need to 
append a "\0"; string literals always have a trailing NUL after 
them, and they autoconvert to const(char)[] so you don't need the 
.ptr either.