Reading Standard Input

[Ali Çehreli]

On 01/23/2013 09:59 AM, Kenneth Sills wrote:

 > I'm having trouble with input. You see, I need
 > nonblocking (which I've set up) input that can read character by
 > character (so when the user presses r, it immediately takes it
 > in, not waiting for an enter) and I need to be able to see things
 > like arrow keys, shift keys, and control keys.

Not possible with standard input.

Standard input is a character stream that is bound to the program by the 
environment that has started the program. The program has been written 
in the D language (or C, etc.) but it has no control on how that 
character stream is filled in by the environment.

There isn't even the concept of a keyboard nor a monitor.

 > I know it's quite possible in C

It is exactly the same story in C. :) You must have been relying on 
special libraries.

 > but again, half the point of this project is
 > being pure D.So how would I go about implementing this?

You must use a library like ncurses, which is aware of the keyboard (or 
write one yourself. (I don't know how. :))).

I had captured some of these ideas here:

   http://ddili.org/ders/d.en/io.html

   http://ddili.org/ders/d.en/stream_redirect.html

Ali