Is this a new bug ?

[Newbie2019]

On Saturday, 20 July 2019 at 04:18:15 UTC, Adam D. Ruppe wrote:
> show me what you're doing now and I'll see which case it is. 
> Most the time I see these, the code is significantly simplified 
> and bugs fixed by removing the usages of these strings..

I want to do this in betterC:

template asPure(string P, alias Fn) if 
(isFunctionPointer!(typeof(&Fn))) {
	enum N = __traits(identifier, Fn);
	enum string asPure = "private alias " ~ N ~ "_P = " ~ 
typeof(&Fn).stringof ~ " pure;\n" ~ "__gshared immutable " ~ N ~ 
"_P " ~ P ~"= cast(" ~ N ~ "_P) &" ~ N ~ " ;" ;
}