stream == range ? [Sliding window]

[w0rp via Digitalmars-d]

I wonder if we even need something like popFrontN. Whenever I 
have wanted to read chunks at a time, like some data from a TCP 
socket, I have always specified a buffer size and tried to get as 
much data as I can fit into my buffer for each iteration. You can 
accomplish this with a range of chunks of data, like byChunk for 
a file, and then operate on the chunks instead of individual 
bytes.

If you are writing code where you just want to grab large chunks 
of data from a socket at a time, and you don't care about the 
rest of the code operating on characters, you can do this.

someSocket.byChunk(bufferSize).joiner.doSomething;

But then many ranges will already use an internal buffer, but 
present a range of bytes anyway.