next!T

[Ali Çehreli via Digitalmars-d-learn]

On 05/25/2014 05:21 PM, Andrew Edwards wrote:
> Hello All,
>
> I wrote the following convenience functions to aid in my studies.
> Unfortunately, I'm using Java books (Ali I will get to yours soon
> enough) so the need was necessitated by the frequency of use in the
> examples. Would appreciate a sanity check. Is there something that I
> should be thinking about am obviously not? Comments/criticisms appreciated.
>
> ------------ io.d ------------
> module io;
>
> public import std.stdio;
>
> private string buffer;
>
> auto next(T)()
> {
>      import std.traits;
>      import std.conv;
>      import std.string;
>
>      if(buffer.length == 0)
>          buffer = stdin.readln;
>
>      static if (isSomeString!T) {
>          scope (exit) buffer = null;
>          return buffer.strip;
>      }
>      else {
>          scope (exit) buffer = buffer.strip;
>          return parse!T(buffer);
>      }
> }
>
> auto next(T)(string msg)
> {
>      if (msg != null)
>          msg.write;
>
>      return next!T;
> }
> ------------ End ------------
>
> Thanks,
> Andrew

Works like a charm here! :)

void main()
{
     auto s = next!string("What is your name? ");
     auto i = next!uint("Your age? ");
     auto a = next!string("Your address? ");
     auto arr = next!(string[])("Names of your children? ");

     writefln("%s year old %s lives in %s. Children: %s", i, s, a, arr);
}

Ali