Re: overloading a function taking a void[][]

[Timon Gehr]

Try this:
template digest(Hash) if(isDigest!Hash){
	digestType!Hash digest(Range)(Range data) if(!is(Range:void[][]) && 
isInputRange!Range && 
__traits(compiles,digest!Hash(ElementType!(Range).init))){
                //implementation detail
        }
	digestType!Hash digest()(scope const(void[])[] data...){ // templated 
as a workaround
                //implementation detail
        }
        // ... (maybe more overloads)
}