Implicit conversion from a base/array type

[Martijn Pot]

I tried something similar to (check first answer):
http://stackoverflow.com/questions/121162/what-does-the-explicit-keyword-in-c-mean

but I can't get it to work. But then again... I'm just starting 
with D.

It seems not to be supported:
http://forum.dlang.org/thread/teddgvbtmrxumffrhojh@forum.dlang.org#post-qxqdksfoamarwjtpjcfq:40forum.dlang.org