Treating a slice as an InputRange

[unleashy]

Hello,

I'm writing a small parser for a specific binary format. The 
format is parsed by way of a sequence of functions, each 
deserializing a small portion of the format into a D type such as 
int, double, string, etc., operating on a single InputRange. The 
problem is, if I pass a slice to each of these functions, the 
slice doesn't get mutated by the popFront function used in the 
functions, so something like this:

ubyte[] slice;
...
int a = readInt(slice);
double b = readDouble(slice);

Ends up failing, because readInt properly reads an int, but the 
slice is not mutated "outside" of itself, which means readDouble 
will not read from where readInt stopped, and instead read from 
the start of the slice, and failing because there is an int 
encoded there and not a double. Both functions' signatures are 
like this:

T readXXX(Range)(auto ref Range range) if (isInputRange!Range)

So my question is, is there a way to treat a slice strictly as an 
InputRange, so that it is mutated no matter what? Or is there 
another way to do what I'm trying to do?

I've worked around it using a "wrapper" InputRange struct, but I 
feel like there must be another way.

Thanks!