early alpha of D REPL

[Asman01]

On Tuesday, 11 February 2014 at 04:46:41 UTC, Martin Nowak wrote:
> Barely running but already fun and a little useful.
>
> Example:
>
> D> import std.algorithm, std.array, std.file;
> => std
> D> auto name(T)(T t) {
>  |     return t.name;
>  | }
> => name
> D> dirEntries(".", SpanMode.depth).map!name.join(", ")
> => ./drepl_sandbox
> D>
>
> https://github.com/MartinNowak/drepl
> http://drepl.dawg.eu/

Very nice! thanks. I tried the following code but it print 
nothing:

auto twice = (int a) => 2*a;
twice(2);

What's wrong with that?