Operate with void[]

[Sergey]

On Wednesday, 15 January 2014 at 03:11:27 UTC, Adam D. Ruppe 
wrote:
> On Wednesday, 15 January 2014 at 02:58:50 UTC, Sergey wrote:
>> And then back to void[] write to a file?
>
> That's done automatically - any array will implicitly cast to 
> const(void)[].
>
> If you're writing a function that can take any kind of data, 
> for example, std.file.write, it is nice to take a const void[] 
> since then you can pass anything to it:
>
> write("myfile", "a string"); // ok
> write("myfile", [0, 1, 2,3]); // ok
>
> and so on.
>
>
> Going from void[] to any other array requires a cast, since it 
> needs to know what kind of data you want to look at (void has 
> no meaning itself, so indexing it would be nonsense), but going 
> from something else to void happens implicitly.

So, please tell me how do I make replace:

//-------------
import std.stdio;
import std.file;
import std.array;


int main(){
	auto fl_txt = "E:/hosp/TMP/file.TXT";
	void[] str = std.file.read(fl_txt);
	ubyte[] pert = cast(ubyte[])str;	

	str2[0] = replace(pert, [9], [9,9,10]); // ?????????	

	std.file.write(fl_txt, pert);
	return 0;
}
//-------------