Compile-time constness is waaay to strict!

[asd]

I've got D2 code:

> template ObjcMethodSelectorCheck(string sel, A...) {
>	const n = countMethodArguments(sel);

and: 

pure static uint countMethodArguments(string name) {		
		if (name.length == 0) return 0;
		if (name[0] == ':') return 1+countMethodArguments(name[1..$]);
		return countMethodArguments(name[1..$]);
	}

Original version of this method was pure too, but used count++. Fine, maybe compiler wasn't smart enough to understand that, but now I've rewritten it in purely functional style, and it's still not "constant" enough!

objc/method.d(54): Error: cannot evaluate countMethodArguments(ToSetterSelector) at compile time
objc/method.d(57): Error: expression 1u != countMethodArguments(ToSetterSelector) is not constant or does not evaluate to a bool