Input timeout

[Josh]

On Tuesday, 14 May 2013 at 04:14:27 UTC, Ali Çehreli wrote:
> On 05/13/2013 08:50 PM, Josh wrote:
>> Is there a way in D to only accept input for a certain time, 
>> instead of
>> std.stdio.readln's behaviour? Something like "Press a key in 3 
>> seconds
>> to abort".
>>
>> Thanks
>>
>> Josh
>
> An unlikely solution is std.concurrency because it already has 
> a timeout facility:
>
> import std.stdio;
> import std.concurrency;
> import std.datetime;
> import std.string;
>
> void lineReader(Tid owner)
> {
>     while (true) {
>         string line = readln().chomp();
>         owner.send(line);
>     }
> }
>
> void main()
> {
>     spawn(&lineReader, thisTid);
>
>     while (true) {
>         auto received =
>             receiveTimeout(3.seconds,
>                            (string line) {
>                                writefln("Thanks for -->%s<--", 
> line);
>                            });
>
>         if (!received) {
>             writeln("Patiently waiting...");
>         }
>     }
> }
>
> Ali

Thanks Ali, that's almost what I need. Your answer requires the 
user to press enter to send the line. Would it be possible to 
have getch-like behaviour without using C, or would that be the 
only way?