0 cost template instantiation

[jfondren]

On Thursday, 30 September 2021 at 01:44:57 UTC, jfondren wrote:
> 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.

Playing around with this, with a mock-up of your code, doesn't 
change object size at all.

Is the actual source available, that you're seeing this with?